109
FZUS53 KDLH 231508
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
1008 AM CDT Sat Aug 23 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.

LSZ140-141-232215-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
1008 AM CDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.REST OF TODAY...West wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots late. Chance of sprinkles in the
afternoon. Waves 1 to 2 feet.
.TONIGHT...Northwest wind 10 to 15 knots with gusts to around
25 knots. Slight chance of rain showers after midnight. Waves
1 to 2 feet.
.SUNDAY...Northwest wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots late in the afternoon. Slight chance of
rain showers through the day. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northwest wind 10 to 15 knots. Gusts up to
25 knots decreasing to 20 knots in the late evening and
overnight. Mostly cloudy in the evening then becoming partly
cloudy. Waves 1 to 2 feet.

$$

LSZ142-143-232215-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
1008 AM CDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.REST OF TODAY...West wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots early in the afternoon, then increasing to
25 knots late. Chance of sprinkles in the afternoon. Waves 1 to
2 feet.
.TONIGHT...Northwest wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots late in the evening, then increasing to
25 knots after midnight. Chance of sprinkles in the evening.
Slight chance of rain showers after midnight. Waves 1 to 2 feet.
.SUNDAY...Northwest wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots in the afternoon. Slight chance of rain
showers. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to
20 knots in the evening. Mostly cloudy in the evening then
becoming partly cloudy. Waves 1 foot or less.

$$

LSZ144-145-232215-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
1008 AM CDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.REST OF TODAY...Northwest wind 10 to 15 knots with gusts to
around 20 knots. Chance of sprinkles in the afternoon. Waves 1 to
3 feet.
.TONIGHT...Northwest wind 10 to 15 knots with gusts to around
25 knots. Mostly cloudy. Waves 1 to 2 feet.
.SUNDAY...Northwest wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots in the afternoon. Slight chance of rain
showers in the afternoon. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northwest wind 10 to 15 knots with gusts to
around 20 knots. Partly cloudy. Waves 1 to 2 feet.

$$

LSZ146-232215-
Port Wing to Sand Island WI-
1008 AM CDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.REST OF TODAY...West wind 15 to 20 knots with gusts to around
25 knots. Chance of sprinkles in the afternoon. Waves 1 to 3 feet
building to 2 to 4 feet in the afternoon.
.TONIGHT...Northwest wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots in the late evening and early morning,
then increasing to 25 knots early in the morning. Chance of
sprinkles in the evening. Slight chance of rain showers after
midnight. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late
evening and overnight.
.SUNDAY...Northwest wind 5 to 15 knots with gusts to around
25 knots rising to 15 to 20 knots with gusts to around 25 knots
late in the morning, then easing to 10 to 15 knots with gusts to
around 20 knots in the afternoon. Slight chance of rain showers
through the day. Waves 1 to 3 feet.
.SUNDAY NIGHT...Northwest wind 10 to 15 knots easing to 5 to
10 knots in the late evening and overnight. Gusts up to 20 knots.
Mostly cloudy in the evening then becoming partly cloudy. Waves
1 to 2 feet.

$$

LSZ147-232215-
Sand Island to Bayfield WI-
1008 AM CDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.REST OF TODAY...West wind 15 to 20 knots. Gusts up to 25 knots.
Chance of sprinkles in the afternoon. Waves 2 to 4 feet.
.TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 25 knots
decreasing to 20 knots after midnight, then increasing to
25 knots early in the morning. Chance of sprinkles in the
evening. Slight chance of showers and thunderstorms after
midnight. Waves 2 to 4 feet.
.SUNDAY...Northwest wind 15 to 20 knots. Gusts up to 25 knots
until late afternoon. Slight chance of showers and thunderstorms.
Waves 2 to 4 feet.
.SUNDAY NIGHT...Northwest wind 10 to 15 knots easing to 5 to
10 knots in the late evening and overnight. Gusts up to 20 knots.
Mostly cloudy in the evening then becoming partly cloudy. Waves
1 to 3 feet.

$$

LSZ150-232215-
Outer Apostle Islands Beyond 5 NM from Mainland-
1008 AM CDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.REST OF TODAY...West wind 15 to 20 knots with gusts to around
25 knots. Chance of sprinkles in the afternoon. Waves 3 to
5 feet.
.TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 25 knots in
the evening then 25 knots early in the morning. Chance of rain
showers in the evening. Slight chance of showers and
thunderstorms after midnight. Waves 3 to 5 feet.
.SUNDAY...Northwest wind 15 to 20 knots. Gusts up to 25 knots
until late afternoon. Chance of rain showers in the morning.
Slight chance of thunderstorms through the day. Slight chance of
rain showers in the afternoon. Waves 3 to 5 feet.
.SUNDAY NIGHT...Northwest wind 10 to 15 knots with gusts to
around 20 knots. Mostly cloudy in the evening then becoming
partly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet in the
late evening and overnight.

$$

LSZ121-232215-
Chequamegon Bay-Bayfield to Oak Point WI-
1008 AM CDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.REST OF TODAY...West wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots late. Chance of sprinkles in the
afternoon. Waves 1 to 2 feet.
.TONIGHT...Northwest wind 10 to 15 knots with gusts to around
20 knots. Chance of sprinkles in the evening. Waves 1 foot or
less.
.SUNDAY...Northwest wind 15 to 20 knots easing to 10 to 15 knots
in the afternoon. Gusts up to 20 knots increasing to 25 knots
late in the morning, then decreasing to 20 knots in the
afternoon. Chance of rain showers and slight chance of
thunderstorms. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northwest wind 10 to 15 knots. Gusts up to
20 knots early in the evening. Mostly cloudy in the evening then
becoming partly cloudy. Waves 1 foot or less.

$$

LSZ148-232215-
Oak Point to Saxon Harbor WI-
1008 AM CDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING...

.REST OF TODAY...West wind 15 to 20 knots. Gusts up to 20 knots
increasing to 25 knots late. Chance of sprinkles in the
afternoon. Waves 1 to 3 feet.
.TONIGHT...Northwest wind 10 to 15 knots with gusts to around
20 knots. Chance of rain showers in the evening. Slight chance of
showers and thunderstorms after midnight. Waves 1 to 3 feet.
.SUNDAY...Northwest wind 15 to 20 knots. Gusts up to 25 knots
late in the morning. Chance of rain showers and slight chance of
thunderstorms. Waves 1 to 3 feet building to 2 to 4 feet in the
late morning and afternoon.
.SUNDAY NIGHT...Northwest wind 10 to 15 knots with gusts to
around 20 knots easing to 5 to 10 knots after midnight. Mostly
cloudy in the evening then becoming partly cloudy. Waves 1 to
3 feet.

$$

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

BJH