FZUS53 KGRB 190455
NSHGRB

Nearshore Marine Forecast
National Weather Service Green Bay WI
1155 PM CDT Mon May 18 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ521-522-191000-
Green Bay south of line from Cedar River to Rock Island Passage
and north of a line from Oconto WI to Little Sturgeon Bay WI-
Green Bay south of line from Oconto WI to Little Sturgeon Bay WI-
1155 PM CDT Mon May 18 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL NOON CDT TUESDAY...
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT TUESDAY THROUGH
TUESDAY EVENING...

.REST OF TONIGHT...S wind 10 to 20 kts. Waves 2 ft or less.
Patchy dense fog. a chance of showers and a slight chance of
thunderstorms. 
.TUESDAY...SW wind 15 to 25 kts decreasing to 10 to 15 kts
mid-day, then veering W early in the afternoon. Waves 1 to 3 ft.
Patchy dense fog in the morning. a slight chance of showers in
the morning. 
.TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 ft or less. Mostly
cloudy. 
.WEDNESDAY...N wind 5 to 10 kts veering E early in the afternoon.
Waves 2 ft or less. Partly cloudy in the morning then clearing.  

$$

LMZ541-191000-
Rock Island Passage to Sturgeon Bay WI-
1155 PM CDT Mon May 18 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL NOON CDT TUESDAY...
...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING...

.REST OF TONIGHT...S wind 15 to 25 kts. Waves 2 to 4 ft building
to 4 to 7 ft after midnight. Patchy dense fog. a chance of
showers and a slight chance of thunderstorms. 
.TUESDAY...S wind 15 to 25 kts veering SW 10 to 15 kts mid-day,
then veering NW early in the afternoon. Waves 4 to 7 ft. Patchy
dense fog in the morning. a chance of showers. 
.TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 to 4 ft subsiding
to 1 to 3 ft after midnight. Mostly cloudy. 
.WEDNESDAY...N wind 10 to 15 kts veering E 5 to 10 kts early in
the afternoon. Waves 2 ft or less. Mostly sunny.  

$$

LMZ542-543-191000-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
1155 PM CDT Mon May 18 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL NOON CDT TUESDAY...
...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING...

.REST OF TONIGHT...S wind 15 to 25 kts. Waves 4 to 7 ft. Patchy
dense fog. a chance of showers and a slight chance of
thunderstorms. 
.TUESDAY...SW wind 15 to 25 kts veering W early in the afternoon.
Waves 4 to 7 ft. Patchy dense fog in the morning. a slight chance
of showers in the morning. 
.TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 1 to 3 ft. Mostly
cloudy. 
.WEDNESDAY...N wind 10 to 15 kts veering NE in the late morning
and afternoon. Waves 2 ft or less. Partly cloudy in the morning
then clearing.  

$$

See Lake Michigan Open Lake Forecast for Thursday through Saturday.

Wave height forecast is for ice free areas.