656 

FZUS51 KBOX 190206

CWFBOX



Coastal Waters Forecast for Massachusetts and Rhode Island

National Weather Service Boston/Norton MA

1005 PM EDT Mon May 18 2026



Coastal waters from the Merrimack River MA to Watch Hill RI out

to 60 NM



ANZ200-191500-

1005 PM EDT Mon May 18 2026



.Synopsis for Massachusetts and Rhode Island coastal waters...

Gusty SW winds will develop Tue. A strong cold front will cross the 

waters late Wed and Wed evening. Strong high pres builds over the Gt 

Lakes Thu and moves into the waters Fri. The high moves offshore by 

Sat as a frontal boundary approaches from the S.



$$



ANZ250-191500-

Coastal waters east of Ipswich Bay and the Stellwagen Bank

National Marine Sanctuary-

1005 PM EDT Mon May 18 2026



.OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas

2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at

8 seconds. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or

less. 

.TUE...SW winds 10 to 15 kt with gusts up to 20 kt, becoming S

15 to 20 kt with gusts up to 30 kt in the afternoon. Seas 2 to

4 ft. Wave Detail: SW 4 ft at 4 seconds and SE 2 ft at 9 seconds.

Patchy fog in the morning with vsby 1 to 3 NM. 

.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas

3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and SE 3 ft at

9 seconds. Patchy fog after midnight. 

.WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to

4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds.

A chance of showers in the afternoon. 

.WED NIGHT...W winds 10 to 15 kt, becoming NW after midnight.

Gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 2 ft at

4 seconds and SE 2 ft at 9 seconds. A chance of showers in the

evening. 

.THU AND THU NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt.

Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and N 3 ft at

5 seconds. 

.FRI...NE winds 5 to 10 kt. Seas around 2 ft. 

.FRI NIGHT THROUGH SAT NIGHT...E winds 5 to 10 kt. Seas 2 to

3 ft. A chance of showers.  



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ251-191500-

Massachusetts Bay and Ipswich Bay-

1005 PM EDT Mon May 18 2026



.OVERNIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:

SE 2 ft at 4 seconds and W 1 foot at 2 seconds. Patchy fog. 

.TUE...SW winds 10 to 15 kt. Gusts up to 25 kt in the afternoon.

Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at

4 seconds. 

.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas

2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at

9 seconds. 

.WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to

3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at

9 seconds. Showers likely in the afternoon. 

.WED NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas

around 2 ft. Wave Detail: NW 2 ft at 3 seconds and S 1 foot at

4 seconds. A chance of showers in the evening. 

.THU AND THU NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt.

Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and NE 1 foot

at 4 seconds. 

.FRI...E winds 5 to 10 kt. Seas 1 foot or less. 

.FRI NIGHT AND SAT...SW winds 5 to 10 kt, becoming E. Seas around

2 ft, then 1 foot or less. A chance of showers. 

.SAT NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Showers

likely.  



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ231-191500-

Cape Cod Bay-

1005 PM EDT Mon May 18 2026



.OVERNIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas around

2 ft. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at

3 seconds. Patchy fog. Vsby 1 NM or less, increasing to 1 to

3 NM. 

.TUE...SW winds 10 to15 kt, increasing to 15 to 20 kt in the

afternoon. Gusts up to 25 kt. Seas around 2 ft, building to 3 to

4 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and E

1 foot at 4 seconds, becoming SW 2 ft at 3 seconds and E 1 foot

at 4 seconds. Patchy fog in the morning with vsby 1 to 3 NM. 

.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas

2 to 4 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at

9 seconds. Patchy fog after midnight. 

.WED...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to

4 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at

10 seconds. Showers likely in the afternoon. 

.WED NIGHT...W winds 10 to 15 kt, becoming NW after midnight.

Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at

3 seconds and SW 2 ft at 3 seconds. A chance of showers in the

evening. 

.THU AND THU NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt.

Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds and S 1 foot

at 6 seconds. 

.FRI...E winds 5 to 10 kt. Seas 1 foot or less. 

.FRI NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. A chance

of showers. 

.SAT AND SAT NIGHT...E winds 5 to 10 kt. Seas 1 foot or less,

then around 2 ft. Showers likely.  



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ254-191500-

Coastal waters from Provincetown MA to Chatham MA to Nantucket MA

out 20 NM-

1005 PM EDT Mon May 18 2026



...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH

WEDNESDAY EVENING...



.OVERNIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to

3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 8 seconds.

Patchy fog. Vsby 1 NM or less. 

.TUE...SW winds 15 to 20 kt. Gusts up to 30 kt in the afternoon.

Seas 3 to 5 ft. Wave Detail: SW 5 ft at 5 seconds and SE 2 ft at

9 seconds. Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM

in the afternoon. 

.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas

4 to 6 ft. Wave Detail: SW 5 ft at 5 seconds and SE 2 ft at

9 seconds. Patchy fog. Vsby 1 NM or less. 

.WED...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to

6 ft. Wave Detail: SW 5 ft at 7 seconds and W 2 ft at 4 seconds.

Patchy fog in the morning. A chance of showers in the afternoon.

Vsby 1 NM or less in the morning. 

.WED NIGHT...W winds 15 to 20 kt, becoming NW 10 to 15 kt after

midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft

at 7 seconds and W 2 ft at 4 seconds. A chance of showers. 

.THU...N winds 10 to 15 kt. Gusts up to 20 kt in the morning.

Seas 2 to 4 ft. Wave Detail: S 3 ft at 7 seconds and N 2 ft at

4 seconds. A chance of showers in the morning. 

.THU NIGHT...S winds around 5 kt, becoming NW around 5 kt after

midnight. Seas 2 to 3 ft. 

.FRI...E winds around 5 kt. Seas 2 to 3 ft. 

.FRI NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of

showers. 

.SAT AND SAT NIGHT...E winds 5 to 10 kt, increasing to 10 to

15 kt. Seas 2 to 4 ft. Showers likely.  



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ255-191500-

Coastal Waters extending out to 25 NM South of Marthas Vineyard

and Nantucket-

1005 PM EDT Mon May 18 2026



...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH

WEDNESDAY EVENING...



.OVERNIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas 3 to

4 ft. Wave Detail: S 3 ft at 7 seconds and NW 2 ft at 4 seconds.

Patchy fog. Vsby 1 NM or less. 

.TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to

4 ft, building to 4 to 6 ft in the afternoon. Wave Detail: W 4 ft

at 6 seconds and SE 2 ft at 9 seconds, becoming W 5 ft at

5 seconds and SE 2 ft at 9 seconds. Patchy fog. Vsby 1 NM or

less,increasing to 1 to 3 NM in the afternoon. 

.TUE NIGHT...SW winds around 20 kt with gusts up to 25 kt. Seas

5 to 7 ft. Wave Detail: W 7 ft at 6 seconds and E 1 foot at

10 seconds. Patchy fog. Vsby 1 NM or less. 

.WED...SW winds around 20 kt with gusts up to 25 kt. Seas 5 to

6 ft. Wave Detail: W 6 ft at 6 seconds and E 1 foot at 9 seconds.

Patchy fog in the morning. A chance of showers in the afternoon.

Vsby 1 NM or less in the morning. 

.WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, becoming

NW 10 to 15 kt after midnight. Seas 4 to 6 ft. Wave Detail: W

6 ft at 6 seconds and N 2 ft at 2 seconds. Showers likely. 

.THU...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning.

Seas 2 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and N 2 ft at

4 seconds. A chance of showers in the morning. 

.THU NIGHT...SE winds 5 to 10 kt, becoming W after midnight. Seas

2 to 3 ft. 

.FRI...E winds 5 to 10 kt. Seas around 2 ft. 

.FRI NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. A chance of

showers. 

.SAT AND SAT NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt. Seas

2 to 4 ft. Showers likely.  



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ256-191500-

Coastal Waters from Montauk NY to Marthas Vineyard extending out

to 20 NM South of Block Island-

1005 PM EDT Mon May 18 2026



...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH

WEDNESDAY EVENING...



.OVERNIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas 3 to

4 ft. Wave Detail: SW 3 ft at 6 seconds and SE 2 ft at 8 seconds.

Patchy fog. Vsby 1 NM or less. 

.TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to

5 ft. Wave Detail: W 5 ft at 6 seconds and SE 2 ft at 9 seconds.

Patchy fog. Vsby 1 NM or less in the morning. 

.TUE NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas

5 to 7 ft. Wave Detail: W 7 ft at 7 seconds and E 2 ft at

10 seconds. Patchy fog. Vsby 1 NM or less. 

.WED...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to

6 ft. Wave Detail: SW 6 ft at 7 seconds and SE 2 ft at 9 seconds.

Patchy fog in the morning. A chance of showers in the afternoon.

Vsby 1 NM or less in the morning. 

.WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, becoming

NW 10 to 15 kt after midnight. Seas 4 to 6 ft. Wave Detail: SW

6 ft at 7 seconds and N 2 ft at 3 seconds. A chance of showers. 

.THU...N winds 10 to 15 kt, becoming E 5 to 10 kt in the

afternoon. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and

N 2 ft at 3 seconds. A chance of showers in the morning. 

.THU NIGHT...SE winds 5 to 10 kt, becoming NE after midnight.

Seas 2 to 3 ft. 

.FRI...E winds 5 to 10 kt. Seas around 2 ft. 

.FRI NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. A chance of

showers. 

.SAT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to

4 ft. Showers likely. 

.SAT NIGHT...E winds around 15 kt with gusts up to 20 kt. Seas

3 to 5 ft. Showers likely.  



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ232-191500-

Nantucket Sound-

1005 PM EDT Mon May 18 2026



.OVERNIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to

3 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at

3 seconds. Patchy fog. Vsby 1 NM or less. 

.TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to

4 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at

3 seconds. Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM

in the afternoon. 

.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas

3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot at

9 seconds. Patchy fog. Vsby 1 NM or less. 

.WED...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to

4ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at

9 seconds. Patchy fog in the morning. A chance of showers in the

afternoon. Vsby 1 to 3 NM in the morning. 

.WED NIGHT...W winds 15 to 20 kt, becoming NW 10 to 15 kt after

midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft

at 5 seconds and N 2 ft at 2 seconds. A chance of showers. 

.THU AND THU NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt.

Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SW 1 foot at

6 seconds. 

.FRI...E winds 5 to 10 kt. Seas around 2 ft. 

.FRI NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A chance of

showers. 

.SAT AND SAT NIGHT...E winds 5 to 10 kt, increasing to 10 to

15 kt. Seas around 2 ft. Showers likely. 



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ233-191500-

Vineyard Sound-

1005 PM EDT Mon May 18 2026



.OVERNIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to

3 ft. Wave Detail: S 3 ft at 7 seconds and W 1 foot at 3 seconds.

Patchy fog. Vsby 1 NM or less. 

.TUE...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the

afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: W 4 ft

at 5 seconds and E 1 foot at 3 seconds. Patchy fog in the morning

with vsby 1 NM or less. 

.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas

3 to 5 ft. Wave Detail: SW 5 ft at 5 seconds and E 1 foot at

8 seconds. Patchy fog. Vsby 1 NM or less. 

.WED...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to

5 ft. Wave Detail: SW 5 ft at 7 seconds and E 1 foot at

8 seconds. Patchy fog in the morning. A chance of showers in the

afternoon. Vsby 1 to 3 NM in the morning. 

.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming

NW after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at

7 seconds and NW 2 ft at 3 seconds. A chance of showers. 

.THU AND THU NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave

Detail: N 3 ft at 4 seconds and SW 3 ft at 7 seconds. 

.FRI...E winds 5 to 10 kt. Seas around 2 ft. 

.FRI NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of

showers. 

.SAT AND SAT NIGHT...E winds 10 to 15 kt. Seas around 2 ft.

Showers likely.  



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ234-191500-

Buzzards Bay-

1005 PM EDT Mon May 18 2026



.OVERNIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail:

W 2 ft at 3 seconds and S 2 ft at 7 seconds. Patchy fog. Vsby

1 NM or less. 

.TUE...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the

afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW

3 ft at 5 seconds and W 1 foot at 2 seconds. Patchy fog in the

morning with vsby 1 NM or less. 

.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas

3 to 4 ft. Wave Detail: S 3 ft at 6 seconds and SE 1 foot at

15 seconds. Patchy fog. Vsby 1 NM or less. 

.WED...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to

4 ft. Wave Detail: SW 4 ft at 5 seconds and S 2 ft at 8 seconds.

Patchy fog in the morning. Showers likely in the afternoon. Vsby

1 to 3 NM in the morning. 

.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming

NW after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at

7 seconds and N 2 ft at 2 seconds. A chance of showers in the

evening. 

.THU AND THU NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave

Detail: N 2 ft at 3 seconds and SW 2 ft at 6 seconds. 

.FRI...E winds 5 to 10 kt. Seas 1 foot or less. 

.FRI NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A chance of

showers. 

.SAT AND SAT NIGHT...E winds 5 to 10 kt, increasing to 10 to

15 kt. Seas around 2 ft. Showers likely. 



Seas are reported as significant wave height, whichis the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ235-191500-

Rhode Island Sound-

1005 PM EDT Mon May 18 2026



.OVERNIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to

3 ft. Wave Detail: S 3 ft at 7 seconds and W 1 foot at 3 seconds.

Patchy fog. Vsby 1 NM or less. 

.TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to

5 ft. Wave Detail: SW 5 ft at 6 seconds and E 1 foot at

3 seconds. Patchy fog. Vsby 1 NM or less in the morning. 

.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas

4 to 6 ft. Wave Detail: SE 6 ft at 7 seconds and W 3 ft at

4 seconds. Patchy fog. Vsby 1 NM or less. 

.WED...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to

5 ft. Wave Detail: SW 5 ft at 7 seconds and SE 3 ft at 7 seconds.

Patchy fog in the morning. A chance of showers in the afternoon.

Vsby 1 to 3 NM in the morning. 

.WED NIGHT...W winds 15 to 20 kt, becoming NW 10 to 15 kt after

midnight. Seas 3 to 5 ft. Wave Detail: S 5 ft at 7 seconds and N

2 ft at 2 seconds. A chance of showers in the evening. 

.THU AND THU NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave

Detail: S 3 ft at 7 seconds and N 2 ft at 4 seconds. 

.FRI...E winds 5 to 10 kt. Seas around 2 ft. 

.FRI NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of

showers. 

.SAT AND SAT NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt. Seas

2 to 4 ft. Showers likely.  



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ237-191500-

Block Island Sound-

1005 PM EDT Mon May 18 2026



.OVERNIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S

2 ft at 7 seconds and W 1 foot at 3 seconds. Patchy fog. Vsby

1 NM or less. 

.TUE...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the

afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft

at 6 seconds and E 1 foot at 2 seconds. Patchy fog in the morning

with vsby 1 NM or less. 

.TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas

3 to 5 ft. Wave Detail: SW 5 ft at 7 seconds and W 2 ft at

4 seconds. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less

after midnight. 

.WED...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the

afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW

4 ft at 7 seconds and W 2 ft at 4 seconds. Showers likely in the

afternoon. 

.WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming

NW after midnight. Seas 2 to 4 ft. Wave Detail: S 4 ft at

7 seconds and W 2 ft at 4 seconds. A chance of showers in the

evening. 

.THU AND THU NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave

Detail: S 3 ft at 7 seconds and SE 2 ft at 9 seconds. 

.FRI...E winds 5 to 10 kt. Seas around 2 ft. 

.FRI NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. A chance of

showers. 

.SAT AND SAT NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt. Seas

2 to 4 ft. Showers likely.  



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ230-191500-

Boston Harbor-

1005 PM EDT Mon May 18 2026



.OVERNIGHT...SW winds 5 to 10 kt. Waves around 2 ft, then 1 foot

or less. 

.TUE...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.

Waves 1 foot or less, then around 2 ft in the afternoon. 

.TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves

around 2 ft. 

.WED...W winds 10 to 15 kt with gusts up to 20 kt. Waves around

2 ft. Showers likely in the afternoon. 

.WED NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt in the

evening. Waves around 2 ft. A chance of showers in the evening. 

.THU AND THU NIGHT...NW winds 10 to 15 kt. Waves around 2 ft. 

.FRI...E winds 5 to 10kt. Waves 1 foot or less. 

.FRI NIGHT AND SAT...SW winds 5 to 10 kt, becoming E. Waves

1 foot or less. A chance of showers. 

.SAT NIGHT...E winds 5 to 10 kt. Waves 1 foot or less. Showers

likely.  



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ236-191500-

Narragansett Bay-

1005 PM EDT Mon May 18 2026



.OVERNIGHT...S winds 5 to 10 kt. Waves around 2 ft. Patchy fog.

Vsby 1 NM or less. 

.TUE...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to

3 ft. Patchy fog in the morning with vsby 1 NM or less. 

.TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves

2 to 3 ft. Patchy fog after midnight. 

.WED...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the

afternoon. Gusts up to 25 kt. Waves 2 to 3 ft. Showers likely in

the afternoon. 

.WED NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt in the

evening. Waves 2 to 3 ft. A chance of showers in the evening. 

.THU AND THU NIGHT...NW winds 10 to 15 kt. Waves around 2 ft. 

.FRI...E winds 5 to 10 kt. Waves around 2 ft. 

.FRI NIGHT...S winds 5 to 10 kt. Waves around 2 ft. A chance of

showers. 

.SAT AND SAT NIGHT...E winds 5 to 10 kt. Waves 2 to 3 ft. Showers

likely.  



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ280-191500-

Ocean Waters from the Merrimack River to Plymouth from 40 to

60 NM-

1005 PM EDT Mon May 18 2026



.OVERNIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas

3 to 4 ft. Wave Detail: S 3 ft at 4 seconds and S 2 ft at

7 seconds. Patchy fog. Vsby 1 NM or less. 

.TUE...SW winds 15 to 20 kt. Gusts up to 20 kt, increasing to

30 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: SW 5 ft at

5 seconds and SE 2 ft at 9 seconds. Patchy fog in the morning

with vsby 1 to 3 NM. 

.TUE NIGHT...SW winds 20 to 25 kt, diminishing to 15 to 20 kt

after midnight. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: S

6 ft at 7 seconds. Patchy fog after midnight with vsby 1 to 3 NM.

.WED...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to

6 ft. Wave Detail: SW 5 ft at 7 seconds. A chance of showers in

the afternoon. 

.WED NIGHT...W winds around 15 kt, becoming NW after midnight.

Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: S 4 ft at

7 seconds and W 3 ft at 4 seconds. A chance of showers in the

evening. 

.THU AND THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt.

Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and SW 2 ft at

7 seconds. 

.FRI AND FRI NIGHT...NW winds 5 to 10 kt, becoming SW 10 to 15 kt

with gusts up to 20 kt. Seas around 2 ft. 

.SAT AND SAT NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. A chance

of showers.  



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ281-191500-

Ocean Waters from Provincetown to Nantucket from 20 to 60 NM-

1005 PM EDT Mon May 18 2026



.OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas

3 to 4 ft. Wave Detail: S 3 ft at 6 seconds and SE 2 ft at

8 seconds. Patchy fog. Vsby 1 NM or less. 

.TUE...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to

6 ft. Wave Detail: W 6 ft at 5 seconds and SE 2 ft at 9 seconds.

Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM in the

afternoon. 

.TUE NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas

around 6 ft. Wave Detail: SW 6 ft at 6 seconds and SE 1 foot at

9 seconds. Patchy fog. Vsby 1 NM or less. 

.WED...SW winds around 20 kt with gusts up to 25 kt. Seas 5 to

6 ft. Wave Detail: W 6 ft at 6 seconds and SE 1 foot at

9 seconds. Patchy fog. A chance of showers in the afternoon. Vsby

1 NM or less, increasing to 1 to 3 NM in the afternoon. 

.WED NIGHT...SW winds 15 to 20 kt, becoming NW after midnight.

Gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: W 6 ft at

6 seconds and N 1 foot at 4 seconds. A chance of showers in the

evening, then showers likely after midnight. 

.THU...N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to

4 ft. Wave Detail: SW 4 ft at 7 seconds and N 3 ft at 5 seconds.

A chance of showers in the morning. 

.THU NIGHT...S winds around 5 kt, becoming NW around 5 kt after

midnight. Seas 2 to 4 ft. 

.FRI...NE winds around 5 kt. Seas 2 to 3 ft. 

.FRI NIGHT AND SAT...S winds 5 to 10 kt, becoming E. Seas 2 to

3 ft. A chance of showers. 

.SAT NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas

3 to 5 ft. Showers likely.  



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ282-191500-

Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM-

1005 PM EDT Mon May 18 2026



.OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas

3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at

9 seconds. Patchy fog. Vsby 1 NM or less. 

.TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to

6 ft. Wave Detail: W 5 ft at 6 seconds and SE 2 ft at 9 seconds.

Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM in the

afternoon. 

.TUE NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas

6 to 7 ft. Wave Detail: SW 7 ft at 7 seconds and SE 2 ft at

9 seconds. Patchy fog. Vsby 1 NM or less. 

.WED...SW winds around 20 kt with gusts up to 25 kt. Seas around

6 ft. Wave Detail: W 6 ft at 6 seconds and SE 2 ft at 9 seconds.

Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM in the

afternoon. 

.WED NIGHT...SW winds 15 to 20 kt, becoming NW 10 to 15 kt after

midnight. Gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: W 6 ft

at 6 seconds and N 2 ft at 2 seconds. A chance of showers in the

evening, then showers likely after midnight. 

.THU...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to

4 ft. Wave Detail: SW 4 ft at 7 seconds and N 2 ft at 4 seconds.

Showers likely in the morning. 

.THU NIGHT...E winds 5 to 10 kt, becoming NE after midnight. Seas

2 to 3 ft. 

.FRI...NE winds 5 to 10 kt. Seas 2 to 3 ft. 

.FRI NIGHT...SE winds around 5 kt. Seas around 2 ft. A chance of

showers. 

.SAT AND SAT NIGHT...E winds 10 to 15 kt with gusts up to 20 kt.

Seas 3 to 5 ft. Showers likely.  



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



ANZ283-191500-

Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM-

1005 PM EDT Mon May 18 2026



.OVERNIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas

3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at

9 seconds. Patchy fog, then patchy dense fog. Vsby 1 NM or less. 

.TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to

6 ft. Wave Detail: W 5 ft at 6 seconds and SE 2 ft at 9 seconds.

Patchy fog. Vsby 1 NM or less in the morning. 

.TUE NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas

5 to 7 ft. Wave Detail: W 7 ft at 6 seconds and SE 2 ft at

10 seconds. Patchy fog. Vsby 1 NM or less. 

.WED...SW winds around 20 kt with gusts up to 30 kt. Seas 5 to

6 ft. Wave Detail: W 6 ft at 7 seconds and SE 2 ft at 9 seconds.

Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM in the

afternoon. 

.WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, becoming

NW 10 to 15 kt after midnight. Seas 4 to 6 ft. Wave Detail: SW

6 ft at 7 seconds and N 2 ft at 3 seconds. A chance of showers in

the evening, then showers likely after midnight. 

.THU...N winds 10 to 15 kt, becoming NE 5 to 10 kt in the

afternoon. Gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW

4 ft at 6 seconds and N 2 ft at 4 seconds. Showers likely in the

morning. 

.THU NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas

2 to 3 ft. 

.FRI...E winds 5 to 10 kt. Seas around 2 ft. 

.FRI NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. A chance of

showers. 

.SAT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to

5 ft. Showers likely. 

.SAT NIGHT...E winds 15 to 20 kt. Seas 4 to 6 ft. Showers likely.

 



Seas are reported as significant wave height, which is the

average of the highest third of the waves. Individual wave

heights may be more than twice the significant wave height.



$$



For the latest updates...please visit our webpage at

www.weather.gov/boston



You can follow us on Facebook at

www.facebook.com/us.nationalweatherservice.boston.gov



You can follow us on Twitter at

@NWSBoston








748 

FZUS52 KKEY 190226

CWFKEY



Coastal Waters Forecast for the Florida Keys

National Weather Service Key West FL

1026 PM EDT Mon May 18 2026



Florida Bay, Hawk Channel and Straits of Florida from Ocean Reef

to south of Dry Tortugas, and the extreme southeastern Gulf of

America, including The Florida Keys National Marine Sanctuary



Seas are given as significant wave height, which is the average

height of the highest 1/3 of the waves. Individual waves may be

more than twice the significant wave height.



Wave Detail will include details about the period and direction

of origin for the highest energy waves. Long-period swells coming

from a different direction than the wind would be included in the

Wave Detail.



GMZ005-191430-

Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas

1026 PM EDT Mon May 18 2026



.SYNOPSIS...Surface high pressure centered north of Bermuda will 

continue to promote moderate to fresh east to southeast breezes 

through the next couple of days. Highest breezes will prevail 

through Tuesday evening. Breezes then undergo a very slow 

slackening process before the weekend with peaks expected during 

the evenings and lulls during the day. Rain and thunder chances 

will remain above normal through much of the week.



The Approximate Shoreward Edge of the Gulf Stream as of May 12... 



35 NM South of Dry Tortugas Light...on Loggerhead Key.

 9 NM South of Cosgrove Shoal Light...off the Marquesas Keys.

 6 NM South of Sand Key Light...off Key West.

 7 NM South of Looe Key...off Big Pine Key.

 6 NM Southeast of Sombrero Key Light...off Marathon.

 6 NM Southeast of Alligator Reef Light...off Islamorada.

 4 NM Southeast of Molasses Reef Light...off Key Largo.  

 3 NM Southeast of Carysfort Reef Light...off Ocean Reef.



Gulf Stream Information Courtesy of the National Weather Service in 

Key West based on products from NASA SPoRT and RTOFS.



$$



GMZ031-191430-

Florida Bay including Barnes Sound, Blackwater Sound, and

Buttonwood Sound-

1026 PM EDT Mon May 18 2026



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.OVERNIGHT...East winds 15 to 20 knots. Bay waters choppy. A 

chance of showers with a slight chance of thunderstorms. 

.TUESDAY...East winds 15 to 20 knots early, decreasing to near 15

knots. Bay waters choppy, becoming a moderate chop. A chance of 

showers with a slight chance of thunderstorms. 

.TUESDAY NIGHT...East winds near 15 knots. Bay waters a moderate

chop. A chance of showers with a slight chance of thunderstorms. 

.WEDNESDAY AND WEDNESDAY NIGHT...East winds 10 to 15 knots. Bay 

waters a light to moderate chop. A slight chance of showers and 

thunderstorms.

.THURSDAY...East winds 10 to 15 knots, decreasing to near 10 knots.

Bay waters a light to moderate chop, becoming a light chop. A 

slight chance of showers and thunderstorms. 

.THURSDAY NIGHT...East winds 5 to 10 knots. Bay waters smooth to

a light chop. A slight chance of showers. 

.FRIDAY...East to southeast winds 5 to 10 knots. Bay waters

smooth to a light chop. A slight chance of showers and

thunderstorms. 

.FRIDAY NIGHT...East to southeast winds near 10 knots. Bay waters

a light chop. A slight chance of showers. 

.SATURDAY...Southeast winds near 10 knots. Bay waters a light

chop. A chance of showers with a slight chance of thunderstorms. 

.SATURDAY NIGHT...East to southeast winds 10 to 15 knots. Bay

waters a light to moderate chop. A chance of showers with a

slight chance of thunderstorms. 



$$



GMZ032-035-191430-

Bayside and Gulfside from Craig Key to west end of Seven Mile

Bridge-

Gulf of America from west end of Seven Mile Bridge to Halfmoon

Shoal out to 5 Fathoms-

1026 PM EDT Mon May 18 2026



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.OVERNIGHT...East winds 15 to 20 knots. Seas 2 to 3 feet. 

Nearshore waters choppy. A chance of showers with a slight chance 

of thunderstorms. 

.TUESDAY...East winds 15 to 20 knots, decreasing to near 15 

knots. Seas around 2 feet, except 2 to 3 feet west of the 

Marquesas Keys. Nearshore waters choppy, becoming a moderate 

chop. A chance of showers with a slight chance of thunderstorms. 

.TUESDAY NIGHT...East winds near 15 knots. Seas subsiding to 1 to

2 feet. Nearshore waters a moderate chop. A chance of showers 

with a slight chance of thunderstorms.

.WEDNESDAY AND WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 

1 to 2 feet. Nearshore waters a light to moderate chop. A chance 

of showers with a slight chance of thunderstorms.

.THURSDAY...East winds near 10 knots. Seas 1 to 2 feet. Nearshore

waters a light chop. A slight chance of showers and

thunderstorms. 

.THURSDAY NIGHT...East to southeast winds 5 to 10 knots. Seas

around 1 foot. Nearshore waters smooth to a light chop. A slight 

chance of showers. 

.FRIDAY AND FRIDAY NIGHT...East to southeast winds 5 to 10 knots.

Seas around 1 foot. Nearshore waters smooth to a light chop. A 

slight chance of showers and thunderstorms.

.SATURDAY...Southeast winds near 10 knots. Seas around 1 foot. 

Nearshore waters a light chop. A slight chance of showers and 

thunderstorms.

.SATURDAY NIGHT...East to southeast winds increasing to 10 to 15 

knots. Seas building to 1 to 2 feet. Nearshore waters becoming a 

light to moderate chop. A chance of showers with a slight chance 

of thunderstorms. 



$$



GMZ042>044-191430-

Hawk Channel from Ocean Reef to Craig Key out to the reef-

Hawk Channel from Craig Key to west end of Seven Mile Bridge out

to the reef-

Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal

out to the reef-

1026 PM EDT Mon May 18 2026



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.OVERNIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet,

occasionally to 5 feet. Nearshore waters choppy. A chance of

showers with a slight chance of thunderstorms. 

.TUESDAY...East winds 15 to 20 knots. Seas 2 to 4 feet, 

occasionally to 5 feet. Nearshore waters a moderate chop. A chance

of showers with a slight chance of thunderstorms. 

.TUESDAY NIGHT...East winds 15 to 20 knots, decreasing to near 15

knots. Seas 2 to 3 feet. Nearshore waters choppy, becoming a

moderate chop. A chance of showers with a slight chance of 

thunderstorms. 

.WEDNESDAY...East winds 10 to 15 knots. Seas 1 to 2 feet, except 2

to 3 feet west of the Marquesas Keys. Nearshore waters a light to

moderate chop. A chance of showers with a slight chance of 

thunderstorms. 

.WEDNESDAY NIGHT...East winds near 15 knots, decreasing to 10 to 

15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of the 

Marquesas Keys. Nearshore waters a moderate chop, becoming a light

to moderate chop. A slight chance of showers and thunderstorms. 

.THURSDAY...East winds near 10 knots. Seas 1 to 2 feet. Nearshore

waters a light chop. A slight chance of showers and

thunderstorms. 

.THURSDAY NIGHT...East to southeast winds near 10 knots. Seas 1 

to 2 feet. Nearshore waters a light chop. A slight chance of 

showers.

.FRIDAY...East to southeast winds 5 to 10 knots. Seas around 1

foot. Nearshore waters smooth to a light chop. A slight chance of

showers and thunderstorms. 

.FRIDAY NIGHT...East to southeast winds near 10 knots. Seas 

around 1 foot, except building to 1 to 2 feet west of the

Marquesas Keys. Nearshore waters a light chop. A slight chance of

showers and thunderstorms.

.SATURDAY...East to southeast winds near 10 knots. Seas 1 to

2 feet. Nearshore waters a light chop. A slight chance of showers

and thunderstorms. 

.SATURDAY NIGHT...East to southeast winds 10 to 15 knots. Seas

1 to 2 feet. Nearshore waters a light to moderate chop. A chance

of showers with a slight chance of thunderstorms. 



$$



GMZ052>055-072>075-191430-

Straits of Florida from Ocean Reef to Craig Key out 20 NM-

Straits of Florida from Craig Key to west end of Seven Mile

Bridge out 20 NM-

Straits of Florida from west end of Seven Mile Bridge to south of

Halfmoon Shoal out 20 NM-

Straits of Florida from Halfmoon Shoal to 20 NM west of Dry

Tortugas out 20 NM-

Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out-

Straits of Florida from Craig Key to west end of Seven Mile

Bridge 20 to 60 NM out-

Straits of Florida from west end of Seven Mile Bridge to south of

Halfmoon Shoal 20 to 60 NM out-

Straits of Florida from Halfmoon Shoal to 20 NM west of Dry

Tortugas 20 to 60 NM out-

1026 PM EDT Mon May 18 2026



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.OVERNIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet, 

occasionally to 8 feet. Wave Detail: East 6 feet at 6 seconds. A 

chance of showers with a slight chance of thunderstorms. 

.TUESDAY...East winds 15 to 20 knots. Seas 3 to 5 feet, 

occasionally to 6 feet. Wave Detail: East 5 feet at 6 seconds. A 

chance of showers with a slight chance of thunderstorms. 

.TUESDAY NIGHT...East winds 15 to 20 knots, decreasing to near 15

knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: 

East 4 feet at 5 seconds. A chance of showers with a slight chance

of thunderstorms. 

.WEDNESDAY...East winds near 15 knots. Seas 3 to 4 feet, 

occasionally to 5 feet. A slight chance of showers and 

thunderstorms. 

.WEDNESDAY NIGHT...East winds near 15 knots, decreasing to 10 to 

15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A slight 

chance of showers and thunderstorms. 

.THURSDAY...East winds 10 to 15 knots. Seas 2 to 4 feet,

occasionally to 5 feet. A slight chance of showers and 

thunderstorms.

.THURSDAY NIGHT...East to southeast winds near 10 knots. Seas 2 

to 3 feet. A slight chance of showers and thunderstorms. 

.FRIDAY...East to southeast winds near 10 knots. Seas around 2 

feet. A slight chance of showers. 

.FRIDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 2 to

3 feet. A slight chance of showers and thunderstorms.

.SATURDAY...East to southeast winds near 10 knots. Seas 1 to

2 feet. A slight chance of showers and thunderstorms. 

.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet. A

chance of showers with a slight chance of thunderstorms. 



$$



GMZ033-034-191430-

Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM

out and beyond 5 fathoms-

Gulf of America including Dry Tortugas and Rebecca Shoal Channel-

1026 PM EDT Mon May 18 2026



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.OVERNIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet,

occasionally to 5 feet. Wave Detail: East 4 feet at 5 seconds. A

chance of showers with a slight chance of thunderstorms. 

.TUESDAY...East winds 15 to 20 knots early, decreasing to near 15

knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: 

East 3 feet at 5 seconds. A chance of showers with a slight chance

of thunderstorms. 

.TUESDAY NIGHT...East winds near 15 knots, decreasing to 10 to 15

knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 4 seconds. A

chance of showers with a slight chance of thunderstorms. 

.WEDNESDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. A

slight chance of showers and thunderstorms. 

.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet. A

slight chance of showers and thunderstorms. 

.THURSDAY...East winds 10 to 15 knots, decreasing to 5 to 10 

knots. Seas 1 to 2 feet. A slight chance of showers and 

thunderstorms. 

.THURSDAY NIGHT...East winds 5 to 10 knots. Seas 1 to 2 feet. A

slight chance of showers and thunderstorms. 

.FRIDAY...East to southeast winds near 5 knots. Seas 1 to 2 feet.

A slight chance of showers and thunderstorms. 

.FRIDAY NIGHT AND SATURDAY...East to southeast winds near 10 

knots. Seas 1 to 2 feet. A slight chance of showers and 

thunderstorms.

.SATURDAY NIGHT...East to southeast winds 10 to 15 knots. Seas

around 2 feet. A chance of showers and thunderstorms. 



$$






184 

FZUS56 KLOX 190259

CWFLOX



Coastal Waters Forecast for California

National Weather Service Los Angeles/Oxnard CA

759 PM PDT Mon May 18 2026



Point Piedras Blancas to San Mateo Point CA out 60 NM including the

Channel Islands National Marine Sanctuary



...See weather.gov/marine/wavedetail for more info on the new Wave

Detail format...



PZZ600-191800-

759 PM PDT Mon May 18 2026



.Synopsis for the southern California coast and Santa Barbara

Channel including the Channel Islands National Marine Sanctuary

and National Park...at 02Z or 7 PM PDT, a 1033 mb high was centered

about 1000 NM W of San Fransisco, CA, and a 1007 mb low was located

in central California.



$$



PZZ645-191800-

Point Piedras Blancas to Point Sal westward out to 10 NM-

759 PM PDT Mon May 18 2026



.TONIGHT...NW wind 10 to 15 kt, becoming 5 to 10 kt after midnight.

Seas 5 to 7 ft. Wave Detail: N 2 ft at 10 seconds, NW 6 ft at

11 seconds and S 2 ft at 15 seconds. 

.TUE...NW wind 5 to 10 kt, becoming W 10 to 15 kt in the afternoon.

Seas 5 to 7 ft. Wave Detail: NW 6 ft at 11 seconds and S 2 ft at

16 seconds. 

.TUE NIGHT...W wind 15 to 20 kt, becoming NW 5 to 10 kt after

midnight. Seas 5 to 7 ft. Wave Detail: NW 6 ft at 13 seconds and S

2 ft at 16 seconds. 

.WED...NW wind 5 to 10 kt, becoming 10 to 20 kt with gusts to 25 kt 

in the afternoon. Seas 4 to 6 ft. Wave Detail: NW 5 ft at 13 seconds

and S 2 ft at 15 seconds. 

.WED NIGHT...NW wind 10 to 20 kt in the evening, becoming light. 

Seas 4 to 6 ft. Wave Detail: N 2 ft at 3 seconds, NW 5 ft at 12 

seconds and S 2 ft at 14 seconds. Patchy fog. 

.THU...Light winds, becoming W 5 to 10 kt in the afternoon. Seas

4 to 6 ft. Wave Detail: NW 5 ft at 11 seconds and S 2 ft at

13 seconds. Patchy fog in the morning. 

.THU NIGHT...NW wind 5 to 10 kt in the evening, becoming light.

Seas 4 to 6 ft. Wave Detail: NW 5 ft at 11 seconds and S 2 ft at

14 seconds. 

.FRI...Light winds. Seas 3 to 5 ft. Wave Detail: NW 4 ft at

10 seconds and S 2 ft at 13 seconds. 

.FRI NIGHT...Light winds. Seas 3 to 4 ft. Wave Detail: NW 4 ft at

10 seconds and S 2 ft at 13 seconds. 

.SAT...Light winds. Seas 3 to 4 ft. Wave Detail: NW 3 ft at

10 seconds and S 2 ft at 16 seconds. 

.SAT NIGHT...Light winds. Seas 3 to 4 ft. Wave Detail: NW 3 ft at

10 seconds and SW 2 ft at 14 seconds. 



$$



PZZ670-191800-

Point Piedras Blancas to Point Sal from 10 to 60 NM-

759 PM PDT Mon May 18 2026



...SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM PDT TUESDAY...



.TONIGHT...NW wind 15 to 25 kt, becoming 10 to 20 kt late. Seas 7 

to 9 ft. Wave Detail: NW 8 ft at 10 seconds and S 2 ft at 14 

seconds. 

.TUE...NW wind 10 to 20 kt. Seas 8 to 9 ft. Wave Detail: NW 9 ft at

11 seconds and S 2 ft at 15 seconds. 

.TUE NIGHT...NW wind 10 to 20 kt. Seas 7 to 9 ft. Wave Detail: NW

2 ft at 5 seconds, NW 8 ft at 14 seconds and S 2 ft at 14 seconds. 

.WED...NW wind 10 to 20 kt. Seas 7 to 8 ft. Wave Detail: NW 2 ft at

9 seconds, NW 7 ft at 13 seconds and S 2 ft at 14 seconds. 

.WED NIGHT...NW wind 10 to 20 kt. Seas 7 to 8 ft. Wave Detail: NW

2 ft at 5 seconds, NW 7 ft at 12 seconds and S 2 ft at 14 seconds.

Patchy fog. 

.THU...NW wind 10 to 20 kt. Seas 7 to 8 ft. Wave Detail: NW 8 ft at

10 seconds and S 2 ft at 13 seconds. Patchy fog in the morning. 

.THU NIGHT...NW wind 10 to 15 kt. Seas 6 to 8 ft. Wave Detail: NW

2 ft at 6 seconds, NW 7 ft at 11 seconds and S 2 ft at 13 seconds. 

.FRI...NW wind 5 to 10 kt in the morning, becoming light. Seas 5 to

7 ft. Wave Detail: NW 6 ft at 10 seconds and S 2 ft at 14 seconds. 

.FRI NIGHT...Light winds. Seas 5 to 6 ft. Wave Detail: NW 6 ft at

10 seconds and S 3 ft at 15 seconds. 

.SAT...Light winds. Seas 5 to 6 ft. Wave Detail: NW 5 ft at

10 seconds and S 3 ft at 17 seconds. 

.SAT NIGHT...Light winds. Seas 4 to 5 ft. Wave Detail: NW 5 ft at

9 seconds and S 2 ft at 14 seconds. 



$$PZZ673-191800-

Waters from Pt. Sal to Santa Cruz Island CA and westward 60 nm

including San Miguel and Santa Rosa Islands-

759 PM PDT Mon May 18 2026



...SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM PDT TUESDAY...



.TONIGHT...NW wind 10 to 20 kt with gusts to 25 kt, becoming 10 to

20 kt late. Seas 6 to 9 ft. Wave Detail: NW 8 ft at 10 seconds and 

S 2 ft at 15 seconds. 

.TUE...N wind 10 to 20 kt, becoming NW 10 to 15 kt in the

afternoon. Seas 6 to 9 ft. Wave Detail: NW 8 ft at 11 seconds and S

2 ft at 15 seconds. 

.TUE NIGHT...NW wind 10 to 15 kt. Seas 6 to 8 ft. Wave Detail: NW

2 ft at 2 seconds, NW 8 ft at 12 seconds and S 2 ft at 14 seconds.

Patchy fog after midnight. 

.WED...NW wind 10 to 20 kt. Seas 6 to 8 ft. Wave Detail: NW 2 ft at

9 seconds, NW 7 ft at 13 seconds and S 2 ft at 14 seconds. Patchy

fog in the morning. 

.WED NIGHT...NW wind 10 to 20 kt. Seas 6 to 7 ft. Wave Detail: NW

2 ft at 6 seconds, NW 6 ft at 12 seconds and S 2 ft at 14 seconds.

Patchy fog. 

.THU...NW wind 10 to 15 kt. Seas 6 to 8 ft. Wave Detail: NW 2 ft at

6 seconds, NW 7 ft at 11 seconds and S 2 ft at 13 seconds. Patchy

fog. 

.THU NIGHT...NW wind 10 to 20 kt. Seas 5 to 7 ft. Wave Detail: NW

2 ft at 5 seconds, NW 6 ft at 11 seconds and S 2 ft at 13 seconds. 

.FRI...NW wind 10 to 15 kt, becoming 5 to 10 kt in the afternoon.

Seas 5 to 7 ft. Wave Detail: NW 2 ft at 6 seconds, NW 6 ft at

10 seconds and S 2 ft at 14 seconds. 

.FRI NIGHT...NW wind 5 to 10 kt. Seas 4 to 6 ft. Wave Detail: NW

5 ft at 10 seconds and S 3 ft at 17 seconds. 

.SAT...Light winds. Seas 4 to 6 ft. Wave Detail: NW 5 ft at

10 seconds and S 3 ft at 17 seconds. 

.SAT NIGHT...W wind 5 to 10 kt in the evening, becoming light. Seas

4 to 5 ft. Wave Detail: NW 4 ft at 9 seconds and SW 2 ft at

14 seconds. 



$$



PZZ676-191800-

Outer waters from Santa Cruz Island to San Clemente Island to 60 NM

offshore including San Nicolas and Santa Barbara Islands-

759 PM PDT Mon May 18 2026



...SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM PDT TUESDAY...



.TONIGHT...NW wind 15 to 25 kt, becoming W 10 to 20 kt after

midnight. Seas 5 to 7 ft. Wave Detail: NW 2 ft at 7 seconds, NW

6 ft at 11 seconds and S 2 ft at 15 seconds. 

.TUE...E wind 5 to 10 kt, becoming W in the afternoon. Seas 4 to

6 ft. Wave Detail: NW 5 ft at 11 seconds and S 2 ft at 14 seconds. 

.TUE NIGHT...NW wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: NW

5 ft at 11 seconds and S 2 ft at 14 seconds. Patchy fog after

midnight. 

.WED...W wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: NW 2 ft at

5 seconds, NW 5 ft at 13 seconds and S 2 ft at 13 seconds. Patchy

fog in the morning. 

.WED NIGHT...NW wind 10 to 20 kt. Seas 5 to 7 ft. Wave Detail: NW

2 ft at 5 seconds, NW 5 ft at 12 seconds and S 2 ft at 13 seconds.

Patchy fog. 

.THU...NW wind 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: NW 2 ft at

5 seconds, NW 5 ft at 12 seconds and S 2 ft at 13 seconds. Patchy

fog in the morning. 

.THU NIGHT...NW wind 10 to 20 kt. Seas 4 to 6 ft. Wave Detail: NW

2 ft at 5 seconds, NW 5 ft at 11 seconds and S 2 ft at 14 seconds. 

.FRI...NW wind 10 to 15 kt, becoming W 5 to 10 kt in the afternoon.

Seas 4 to 6 ft. Wave Detail: NW 2 ft at 6 seconds, NW 5 ft at

10 seconds and S 2 ft at 13 seconds. 

.FRI NIGHT...W wind 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: NW

4 ft at 10 seconds and S 2 ft at 13 seconds. 

.SAT...Light winds, becoming W 5 to 10 kt in the afternoon. Seas

3 to 5 ft. Wave Detail: NW 3 ft at 10 seconds and S 2 ft at

16 seconds. 

.SAT NIGHT...W wind 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: NW

3 ft at 10 seconds and S 2 ft at 14 seconds. 



$$



PZZ650-191800-

East Santa Barbara Channel from Pt. Conception to Pt. Mugu CA

including Santa Cruz Island-

759 PM PDT Mon May 18 2026



.TONIGHT...W wind 10 to 20 kt, becoming NE 10 to 15 kt after

midnight. Seas 2 to 4 ft. Wave Detail: NW 2 ft at 6 seconds andW

3 ft at 10 seconds. 

.TUE...Light winds, becoming W 10 to 15 kt in the afternoon. Seas

2 to 3 ft. Wave Detail: W 3 ft at 10 seconds. 

.TUE NIGHT...W wind 10 to 20 kt, becoming NW 10 to 15 kt after

midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 10 seconds. 

.WED...SE wind 5 to 10 kt, becoming SW in the afternoon. Seas 2 to

3 ft. Wave Detail: W 2 ft at 12 seconds. Patchy fog in the morning.

.WED NIGHT...W wind 10 to 15 kt, becoming E 5 to 10 kt after

midnight. Seas 2 to 4 ft. Wave Detail: NW 2 ft at 6 seconds and W

3 ft at 11 seconds. Patchy fog. 

.THU...E wind 5 to 10 kt, becoming SW 10 to 15 kt in the afternoon.

Seas 2 to 3 ft. Wave Detail: W 2 ft at 10 seconds. Patchy fog in

the morning. 

.THU NIGHT...W wind 10 to 20 kt, becoming 15 to 20 kt after

midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and W

2 ft at 9 seconds. 

.FRI...Light winds, becoming SW 5 to 10 kt in the afternoon. Seas

2 to 3 ft. Wave Detail: W 2 ft at 8 seconds.

.FRI NIGHT...W wind 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft

at 9 seconds. 

.SAT...Light winds, becoming SW 5 to 10 kt in the afternoon. Seas

2 ft. Wave Detail: W 2 ft at 9 seconds. 

.SAT NIGHT...W wind 5 to 10 kt. Seas 2 ft. 



$$



PZZ655-191800-

Inner waters from Point Mugu to San Mateo Pt. CA including Santa

Catalina and Anacapa Islands-

759 PM PDT Mon May 18 2026



.TONIGHT...W wind 10 to 15 kt, becoming SE 5 to 10 kt after 

midnight. Seas 2 to 4 ft. Wave Detail: W 3 ft at 9 seconds and S 2 

ft at 15 seconds. 

.TUE...Light winds, becoming W 10 to 20 kt in the afternoon. Seas

2 to 3 ft. Wave Detail: W 2 ft at 9 seconds and S 2 ft at

14 seconds. 

.TUE NIGHT...W wind 10 to 20 kt, becoming SW 5 to 10 kt after

midnight. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 5 seconds, W 2 ft

at 9 seconds and S 2 ft at 14 seconds. Patchy fog after midnight. 

.WED...SE wind 5 to 10 kt, becoming SW in the afternoon. Seas 2 to

3 ft. Wave Detail: W 2 ft at 10 seconds and S 2 ft at 13 seconds.

Patchy fog in the morning. 

.WED NIGHT...SW wind 5 to 10 kt, becoming SE after midnight. Seas

2 to 3 ft. Wave Detail: W 2 ft at 5 seconds, W 2 ft at 11 seconds

and S 2 ft at 13 seconds. Patchy fog. 

.THU...SE wind 5 to 10 kt, becoming SW in the afternoon. Seas 2 to

3 ft. Wave Detail: W 2 ft at 8 seconds and S 2 ft at 14 seconds.

Patchy fog in the morning. 

.THU NIGHT...W wind 10 to 15 kt in the evening, becoming light.

Seas 2 to 4 ft. Wave Detail: W 2 ft at 5 seconds, W 2 ft at

9 seconds and S 2 ft at 13 seconds. 

.FRI...Light winds, becoming SW 10 to 15 kt in the afternoon. Seas

2 to 3 ft. Wave Detail: W 2 ft at 6 seconds and S 2 ft at

13 seconds. 

.FRI NIGHT...W wind 10 to 15 kt in the evening, becoming light.

Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and S 2 ft at

13 seconds. 

.SAT...Light winds, becoming W 10 to 15 kt in the afternoon. Seas

2 to 3 ft. Wave Detail: S 2 ft at 13 seconds. 

.SAT NIGHT...W wind 10 to 20 kt, becoming 5 to 10 kt after

midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and S

2 ft at 13 seconds. 



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www.weather.gov/losangeles