307
FZUS53 KDLH 030900
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
400 AM 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.

LSZ140-141-031615-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
400 AM CDT Wed Sep 3 2025

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

.TODAY...Northwest wind 20 to 25 knots with gusts to around
30 knots. Slight chance of rain showers early in the morning,
then chance of sprinkles late in the morning. Chance of rain
showers in the afternoon. Slight chance of waterspouts in the
afternoon. Waves 2 to 4 feet.
.TONIGHT...Northwest wind 20 to 25 knots. Slight chance of
waterspouts. Chance of rain showers. Waves 1 to 3 feet.
.THURSDAY...West wind 15 to 20 knots. Gusts up to 25 knots in the
late morning and afternoon. Slight chance of waterspouts through
the day. Chance of sprinkles through the day. 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 early
in the morning. Slight chance of waterspouts. Chance of rain
showers. Waves 1 to 3 feet.

$$

LSZ142-143-031615-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
400 AM CDT Wed Sep 3 2025

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

.TODAY...Northwest wind 15 to 20 knots with gusts to around
25 knots. Chance of sprinkles until late afternoon. Slight chance
of rain showers late in the afternoon. Slight chance of
waterspouts in the afternoon. Waves 1 to 2 feet.
.TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 25 knots
decreasing to 20 knots in the late evening and overnight. Slight
chance of waterspouts in the evening. Slight chance of rain
showers in the evening, then chance of sprinkles after midnight.
Waves 1 to 2 feet.
.THURSDAY...West wind 15 to 20 knots. Chance of sprinkles in the
morning. Slight chance of waterspouts in the afternoon. 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. Slight chance of waterspouts. Chance of rain showers.
Waves 1 to 2 feet.

$$

LSZ144-145-031615-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
400 AM CDT Wed Sep 3 2025

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

.TODAY...Northwest wind 15 to 20 knots. Gusts up to 25 knots
early in the morning then 25 knots late in the afternoon. Chance
of sprinkles in the morning, then chance of rain showers and
slight chance of thunderstorms in the afternoon. Slight chance of
waterspouts in the afternoon. Waves 1 to 3 feet.
.TONIGHT...Northwest wind 15 to 20 knots. Chance of rain showers
in the evening. Waves 1 to 3 feet.
.THURSDAY...West wind 15 to 20 knots. Slight chance of
waterspouts in the afternoon. Chance of rain showers in the
afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the
afternoon.
.THURSDAY NIGHT...West wind 10 to 15 knots becoming northwest
with gusts to around 20 knots in the late evening and overnight.
Slight chance of waterspouts through the night. Chance of rain
showers through the night. Waves 1 to 2 feet.

$$

LSZ146-031615-
Port Wing to Sand Island WI-
400 AM CDT Wed Sep 3 2025

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

.TODAY...Northwest wind 15 to 20 knots. Gusts up to 25 knots in
the morning then 25 knots late in the afternoon. Chance of
sprinkles in the morning, then chance of rain showers and slight
chance of thunderstorms in the afternoon. Slight chance of
waterspouts in the afternoon. Waves 2 to 4 feet.
.TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 25 knots in
the evening. Slight chance of waterspouts in the evening. Slight
chance of rain showers in the evening, then 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. Gusts up to 25 knots late in the morning
decreasing to 20 knots. Chance of sprinkles in the morning.
Slight chance of waterspouts in the afternoon. 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 25 knots after
midnight. Slight chance of waterspouts. Chance of rain showers.
Waves 1 to 3 feet subsiding to 1 to 2 feet in the late evening
and overnight.

$$

LSZ147-031615-
Sand Island to Bayfield WI-
400 AM CDT Wed Sep 3 2025

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

.TODAY...Northwest wind 15 to 20 knots. Gusts up to 30 knots
decreasing to 25 knots late in the morning, then then 25 knots
late in the afternoon. Chance of sprinkles in the morning, then
chance of rain showers and slight chance of thunderstorms in the
afternoon. Slight chance of waterspouts in the afternoon. Waves
3 to 5 feet.
.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 in the evening. Chance of sprinkles after
midnight. Waves 2 to 4 feet.
.THURSDAY...West wind 15 to 20 knots with gusts to around
25 knots easing to 5 to 15 knots with gusts to around 20 knots
early in the afternoon, then rising to 15 to 20 knots late in the
afternoon. Chance of sprinkles in the morning. Slight chance of
waterspouts in the afternoon. Waves 2 to 4 feet.
.THURSDAY NIGHT...West wind 15 to 20 knots easing to 5 to
10 knots with gusts to around 20 knots in the late evening and
early morning, then becoming northwest 15 to 20 knots with gusts
to around 25 knots early in the morning. Slight chance of
waterspouts. Chance of rain showers. Waves 1 to 3 feet.

$$

LSZ150-031615-
Outer Apostle Islands Beyond 5 NM from Mainland-
400 AM CDT Wed Sep 3 2025

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

.TODAY...Northwest wind 20 to 25 knots. Gusts up to 30 knots in
the morning. Slight chance of rain showers early in the morning,
then chance of sprinkles late in the morning. Chance of rain
showers in the afternoon. Slight chance of waterspouts in the
afternoon. Waves 4 to 6 feet. Waves occasionally to 8 feet.
.TONIGHT...Northwest wind 20 to 25 knots. Slight chance of
waterspouts. Chance of rain showers. Waves 3 to 5 feet. Waves
occasionally to 7 feet.
.THURSDAY...West wind 20 to 25 knots easing to 15 to 20 knots
late in the afternoon. Chance of sprinkles in the morning. Slight
chance of waterspouts in the afternoon. Waves 4 to 6 feet. Waves
occasionally to 7 feet.
.THURSDAY NIGHT...West wind 15 to 20 knots becoming northwest
early in the morning. Slight chance of waterspouts. Chance of
rain showers. Waves 1 to 3 feet subsiding to 1 to 2 feet in the
late evening and overnight.

$$

LSZ121-031615-
Chequamegon Bay-Bayfield to Oak Point WI-
400 AM CDT Wed Sep 3 2025

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

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

$$

LSZ148-031615-
Oak Point to Saxon Harbor WI-
400 AM CDT Wed Sep 3 2025

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

.TODAY...Northwest wind 20 to 25 knots. Gusts up to 30 knots
early in the morning. Chance of rain showers early in the
morning, then slight chance of rain showers late in the morning.
Chance of rain showers and slight chance of thunderstorms in the
afternoon. Slight chance of waterspouts in the afternoon. Waves
3 to 5 feet. Waves occasionally to 7 feet.
.TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 25 knots
until early morning. Slight chance of waterspouts. Chance of rain
showers. Waves 2 to 4 feet.
.THURSDAY...West wind 15 to 20 knots. Gusts up to 25 knots
decreasing to 20 knots in the afternoon. Chance of sprinkles in
the morning. Slight chance of waterspouts in the afternoon. Waves
2 to 4 feet subsiding to 1 to 3 feet in the afternoon.
.THURSDAY NIGHT...West wind 10 to 15 knots with gusts to around
20 knots becoming northwest with gusts to around 20 knots early
in the morning. Slight chance of waterspouts. Rain showers
likely. Waves 1 to 2 feet.

$$

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

Huyck