541
FZUS53 KDLH 031954
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
254 PM CDT Wed Sep 3 2025

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.

LSZ140-141-040415-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
254 PM CDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...

.TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 30 knots
decreasing to 25 knots in the late evening and overnight. Slight
chance of waterspouts. Chance of rain showers. Waves 1 to 3 feet.
.THURSDAY...West wind 15 to 20 knots with gusts to around
25 knots. Slight chance of waterspouts in the morning. Chance of
rain showers in the morning. Waves 1 to 3 feet.
.THURSDAY NIGHT...West wind 10 to 15 knots with gusts to around
25 knots becoming northwest with gusts to around 20 knots early
in the morning. Slight chance of rain showers through the night.
Waves 1 to 3 feet subsiding to 1 to 2 feet in the late evening
and overnight.
.FRIDAY...Northwest wind 15 to 20 knots. Gusts up to 25 knots
increasing to 30 knots in the afternoon. Slight chance of rain
showers. Waves 1 to 2 feet building to 2 to 4 feet in the late
morning and afternoon. A small craft advisory may be needed.

$$

LSZ142-143-040415-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
254 PM CDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...

.TONIGHT...Northwest wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots in the late evening and overnight. Slight
chance of waterspouts early in the evening. Slight chance of rain
showers early in the evening, then chance of rain showers late in
the evening. Chance of sprinkles after midnight. Waves 1 to
2 feet.
.THURSDAY...West wind 10 to 15 knots with gusts to around
20 knots. Chance of sprinkles in the morning. Waves 1 to 2 feet.
.THURSDAY NIGHT...West wind 10 to 15 knots with gusts to around
20 knots becoming northwest with gusts to around 20 knots after
midnight. Chance of rain showers through the night. Waves 1 to
2 feet.
.FRIDAY...West wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots in the late morning and afternoon. Mostly
cloudy. Waves 1 to 2 feet.

$$

LSZ144-145-040415-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
254 PM CDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...

.TONIGHT...Northwest wind 10 to 15 knots with gusts to around
20 knots. Slight chance of rain showers early in the evening,
then chance of sprinkles in the late evening and overnight. Waves
1 to 3 feet.
.THURSDAY...West wind 15 to 20 knots. Mostly sunny. Waves 1 to
3 feet.
.THURSDAY NIGHT...West wind 10 to 15 knots with gusts to around
20 knots becoming northwest with gusts to around 20 knots in the
late evening and overnight. Rain showers likely in the evening,
then slight chance of rain showers after midnight. Waves 1 to
3 feet.
.FRIDAY...West wind 15 to 20 knots with gusts to around 25 knots.
Mostly cloudy. Waves 1 to 3 feet building to 2 to 4 feet in the
late morning and afternoon.

$$

LSZ146-040415-
Port Wing to Sand Island WI-
254 PM CDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...

.TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 25 knots
early in the evening. Slight chance of waterspouts early in the
evening. Slight chance of rain showers in the evening. Chance of
sprinkles after midnight. Waves 2 to 4 feet.
.THURSDAY...West wind 15 to 20 knots easing to 10 to 15 knots in
the afternoon. Mostly sunny. Waves 2 to 4 feet.
.THURSDAY NIGHT...West wind 10 to 15 knots with gusts to around
20 knots becoming northwest with gusts to around 20 knots after
midnight. Rain showers likely in the evening, then chance of rain
showers after midnight. Waves 2 to 4 feet subsiding to 1 to
2 feet in the late evening and overnight.
.FRIDAY...Northwest wind 5 to 15 knots becoming west 15 to
20 knots in the late morning and early afternoon, then easing to
5 to 15 knots late in the afternoon. Gusts up to 25 knots. Mostly
cloudy. Waves 2 to 4 feet. A small craft advisory may be needed.

$$

LSZ147-040415-
Sand Island to Bayfield WI-
254 PM CDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...

.TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 25 knots
early in the evening. Slight chance of waterspouts in the
evening. Slight chance of waterspouts late in the night. Chance
of rain showers in the evening, then slight chance of rain
showers after midnight. Chance of sprinkles late in the night.
Waves 2 to 4 feet.
.THURSDAY...West wind 15 to 20 knots. Chance of sprinkles in the
morning. Waves 2 to 4 feet.
.THURSDAY NIGHT...West wind 10 to 15 knots with gusts to around
20 knots becoming northwest with gusts to around 20 knots after
midnight. Rain showers likely in the evening, then chance of rain
showers after midnight. Waves 2 to 4 feet subsiding to 1 to
3 feet in the late evening and overnight.
.FRIDAY...West wind 15 to 20 knots with gusts to around 25 knots.
Mostly cloudy. Waves 2 to 4 feet. A small craft advisory may be
needed.

$$

LSZ150-040415-
Outer Apostle Islands Beyond 5 NM from Mainland-
254 PM CDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...

.TONIGHT...Northwest wind 15 to 20 knots with gusts to around
25 knots. Slight chance of waterspouts through the night. Chance
of rain showers in the evening. Slight chance of rain showers
after midnight, then chance of sprinkles late in the night. Waves
4 to 6 feet. Waves occasionally to 8 feet.
.THURSDAY...West wind 15 to 20 knots. Gusts up to 25 knots.
Chance of sprinkles in the morning. Chance of rain showers in the
afternoon. Waves 3 to 5 feet. Waves occasionally to 7 feet.
.THURSDAY NIGHT...West wind 15 to 20 knots with gusts to around
25 knots becoming northwest 10 to 15 knots with gusts to around
20 knots early in the morning. Chance of rain showers. Waves 2 to
4 feet subsiding to 1 to 3 feet after midnight. A small craft
advisory may be needed.
.FRIDAY...Northwest wind 15 to 20 knots with gusts to around
25 knots. Slight chance of rain showers in the morning. Waves
3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory
may be needed.

$$

LSZ121-040415-
Chequamegon Bay-Bayfield to Oak Point WI-
254 PM CDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...

.TONIGHT...Northwest wind 10 to 15 knots with gusts to around
20 knots. Slight chance of waterspouts through the night. Chance
of rain showers in the evening. Slight chance of rain showers
after midnight, then chance of sprinkles late in the night. Waves
1 to 2 feet.
.THURSDAY...West wind 10 to 15 knots with gusts to around
20 knots. Chance of sprinkles in the morning. Waves 1 foot or
less.
.THURSDAY NIGHT...Southwest wind 10 to 15 knots with gusts to
around 20 knots becoming northwest with gusts to around 20 knots
after midnight. Rain showers likely. Waves 1 foot or less.
.FRIDAY...West wind 15 to 20 knots. Gusts up to 20 knots
increasing to 25 knots in the late morning and afternoon. Mostly
cloudy. Waves 1 to 2 feet.

$$

LSZ148-040415-
Oak Point to Saxon Harbor WI-
254 PM CDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...

.TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 25 knots in
the evening. Slight chance of waterspouts through the night.
Chance of rain showers until early morning. Chance of sprinkles
late in the night. Waves 3 to 5 feet.
.THURSDAY...West wind 15 to 20 knots. Chance of sprinkles in the
morning. Waves 2 to 4 feet subsiding to 1 to 2 feet late in the
afternoon.
.THURSDAY NIGHT...Southwest wind 10 to 15 knots with gusts to
around 20 knots becoming northwest with gusts to around 20 knots
after midnight. Rain showers likely. Waves 1 to 2 feet.
.FRIDAY...West wind 15 to 20 knots. Gusts up to 20 knots
increasing to 25 knots in the late morning and afternoon. Chance
of rain showers in the morning. Waves 1 to 3 feet building to
2 to 4 feet in the late morning and afternoon.

$$

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

JDS