FZUS53 KDLH 240321
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
1021 PM CDT Sun Aug 23 2026

For waters within five nautical miles of shore on Lake Superior.         

Waves are the significant wave height - the average of the highest 
1/3 of the wave spectrum. Occasional wave height is the average of 
the highest 1/10 of the wave spectrum.

LSZ140-241000-
Grand Portage to Grand Marais MN-
1021 PM CDT Sun Aug 23 2026

.REST OF TONIGHT...Northwest wind 5 to 10 knots. Mostly clear.
Waves 1 foot or less. 
.MONDAY...North wind 5 to 10 knots becoming southwest in the
afternoon. Mostly sunny. Waves 1 foot or less. 
.MONDAY NIGHT...Southwest wind 5 to 10 knots. Mostly cloudy.
Waves 1 foot or less. 
.TUESDAY...Southeast wind 5 knots. Slight chance of rain showers
in the morning, then rain showers likely and chance of
thunderstorms in the afternoon. Waves 1 foot or less. 

$$

LSZ141-241000-
Grand Marais to Taconite Harbor MN-
1021 PM CDT Sun Aug 23 2026

.REST OF TONIGHT...Northwest wind 5 knots. Partly cloudy. Waves
1 foot or less. 
.MONDAY...North wind 5 knots early in the morning becoming
variable 10 knots or less, then becoming southwest 5 knots in the
afternoon. Mostly sunny. Waves 1 foot or less. 
.MONDAY NIGHT...Variable winds 10 knots or less. Mostly cloudy.
Waves 1 foot or less. 
.TUESDAY...Northeast wind 5 knots becoming southeast in the late
morning and afternoon. Chance of rain showers in the morning,
then rain showers likely and chance of thunderstorms in the
afternoon. Waves 1 foot or less. 

$$

LSZ142-241000-
Taconite Harbor to Silver Bay Harbor MN-
1021 PM CDT Sun Aug 23 2026

.REST OF TONIGHT...Northwest wind 5 knots in the late evening and
early morning becoming variable 10 knots or less. Partly cloudy.
Waves 1 foot or less. 
.MONDAY...Variable winds 10 knots or less. Mostly sunny. Waves
1 foot or less. 
.MONDAY NIGHT...Variable winds 10 knots or less. Slight chance of
rain showers after midnight. Waves 1 foot or less. 
.TUESDAY...Variable winds 10 knots or less becoming southeast
5 knots in the late morning and afternoon. Chance of rain showers
in the morning, then rain showers likely and chance of
thunderstorms in the afternoon. Waves 1 foot or less. 

$$

LSZ143-241000-
Silver Bay Harbor to Two Harbors MN-
1021 PM CDT Sun Aug 23 2026

.REST OF TONIGHT...North wind 5 knots late in the evening
becoming variable 10 knots or less. Partly cloudy in the late
evening and early morning then becoming mostly cloudy. Waves
1 foot or less. 
.MONDAY...Variable winds 10 knots or less becoming east 5 knots
in the afternoon. Partly sunny. Waves 1 foot or less. 
.MONDAY NIGHT...Northeast wind 5 knots. Slight chance of rain
showers after midnight. Waves 1 foot or less. 
.TUESDAY...Variable winds 10 knots or less becoming southeast
5 knots in the late morning and afternoon. Chance of rain showers
and slight chance of thunderstorms in the morning, then rain
showers likely and chance of thunderstorms in the afternoon.
Waves 1 foot or less. 

$$

LSZ144-241000-
Two Harbors to Duluth MN-
1021 PM CDT Sun Aug 23 2026

.REST OF TONIGHT...Northeast wind 5 knots in the late evening and
early morning becoming variable 10 knots or less. Partly cloudy
in the late evening and early morning then becoming mostly
cloudy. Waves 1 foot or less. 
.MONDAY...Variable winds 10 knots or less becoming east 5 to
10 knots in the late morning and afternoon. Mostly sunny. Waves
1 foot or less. 
.MONDAY NIGHT...Northeast wind 5 to 10 knots. Slight chance of
rain showers after midnight. Waves 1 foot or less. 
.TUESDAY...East wind 5 knots becoming south in the late morning
and afternoon. Chance of rain showers and slight chance of
thunderstorms in the morning, then rain showers likely and chance
of thunderstorms in the afternoon. Waves 1 foot or less. 

$$

LSZ145-241000-
Duluth MN to Port Wing WI-
1021 PM CDT Sun Aug 23 2026

.REST OF TONIGHT...East wind 5 to 10 knots becoming south after
midnight, then becoming variable 10 knots or less toward
daybreak. Partly cloudy. Waves 1 foot or less. 
.MONDAY...Variable winds 10 knots or less becoming northeast 5 to
10 knots in the late morning and afternoon. Mostly sunny. Waves
1 foot or less. 
.MONDAY NIGHT...East wind 5 to 10 knots. Slight chance of rain
showers after midnight. Waves 1 foot or less. 
.TUESDAY...South wind 5 knots becoming southwest in the
afternoon. Chance of rain showers and slight chance of
thunderstorms in the morning, then rain showers likely and chance
of thunderstorms in the afternoon. Waves 1 foot or less. 

$$

LSZ146-241000-
Port Wing to Sand Island WI-
1021 PM CDT Sun Aug 23 2026

.REST OF TONIGHT...Southeast wind 5 knots becoming northwest
after midnight, then becoming variable 10 knots or less toward
daybreak. Partly cloudy. Waves 1 foot or less. 
.MONDAY...Variable winds 10 knots or less becoming northeast
5 knots in the afternoon. Mostly sunny. Waves 1 foot or less. 
.MONDAY NIGHT...East wind 5 knots in the evening becoming
variable 10 knots or less. Partly cloudy in the evening then
becoming mostly cloudy. Waves 1 foot or less. 
.TUESDAY...South wind 5 knots becoming northeast late in the
afternoon. Slight chance of showers and thunderstorms in the
morning, then rain showers likely and chance of thunderstorms in
the afternoon. Waves 1 foot or less. 

$$

LSZ147-241000-
Sand Island to Bayfield WI-
1021 PM CDT Sun Aug 23 2026

.REST OF TONIGHT...South wind 5 knots late in the evening
becoming variable 10 knots or less. Partly cloudy. Waves 1 foot
or less. 
.MONDAY...Variable winds 10 knots or less becoming northeast
5 knots early in the afternoon, then becoming east late in the
afternoon. Mostly sunny. Waves 1 foot or less. 
.MONDAY NIGHT...Southeast wind 5 knots. Partly cloudy in the
evening then becoming mostly cloudy. Waves 1 foot or less. 
.TUESDAY...South wind 5 knots becoming east late in the
afternoon. Slight chance of rain showers in the morning, then
rain showers likely and chance of thunderstorms in the afternoon.
Waves 1 foot or less. 

$$

LSZ150-241000-
Outer Apostle Islands Beyond 5 NM from Mainland-
1021 PM CDT Sun Aug 23 2026

.REST OF TONIGHT...South wind 5 knots becoming northwest after
midnight. Mostly clear. Waves 1 foot or less. 
.MONDAY...North wind 5 knots becoming southeast late in the
afternoon. Mostly sunny. Waves 1 foot or less. 
.MONDAY NIGHT...Southeast wind 5 knots. Partly cloudy in the
evening then becoming mostly cloudy. Waves 1 foot or less. 
.TUESDAY...South wind 5 knots becoming southeast late in the
afternoon. Slight chance of rain showers in the morning, then
rain showers likely and chance of thunderstorms in the afternoon.
Waves 1 foot or less. 

$$

LSZ121-241000-
Chequamegon Bay-Bayfield to Oak Point WI-
1021 PM CDT Sun Aug 23 2026

.REST OF TONIGHT...Variable winds 10 knots or less. Partly
cloudy. Waves 1 foot or less. 
.MONDAY...Variable winds 10 knots or less becoming east 5 knots
in the afternoon. Mostly sunny. Waves 1 foot or less. 
.MONDAY NIGHT...East wind 5 knots in the evening becoming
variable 10 knots or less, then becoming south 5 knots early in
the morning. Partly cloudy in the evening then becoming mostly
cloudy. Waves 1 foot or less. 
.TUESDAY...South wind 5 to 10 knots. Slight chance of rain
showers in the morning. Rain showers likely and chance of
thunderstorms in the afternoon. Waves 1 foot or less. 

$$

LSZ148-241000-
Oak Point to Saxon Harbor WI-
1021 PM CDT Sun Aug 23 2026

.REST OF TONIGHT...Variable winds 10 knots or less becoming
southwest 5 knots after midnight. Mostly clear. Waves 1 foot or
less. 
.MONDAY...West wind 5 knots early in the morning becoming
variable 10 knots or less, then becoming east 5 knots in the
afternoon. Mostly sunny. Waves 1 foot or less. 
.MONDAY NIGHT...East wind 5 knots becoming south after midnight.
Partly cloudy. Waves 1 foot or less. 
.TUESDAY...South wind 5 to 10 knots. Slight chance of rain
showers in the morning. Rain showers likely and chance of
thunderstorms in the afternoon. Waves 1 foot or less. 

$$

Graphical marine forecasts are available online at: 
weather.gov/greatlakes 

WFO DLH