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FZUS53 KDLH 201451
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
851 AM CST Thu Nov 20 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.

LSZ140-202300-
Grand Portage to Grand Marais MN-
851 AM CST Thu Nov 20 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON CST TODAY...

.REST OF TODAY...Southwest wind 15 to 20 knots becoming west
10 to 15 knots in the afternoon. Patchy fog early in the morning.
Chance of rain early in the morning. Waves 3 to 5 feet. Waves
occasionally to 7 feet.
.TONIGHT...West wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots early in the morning. Partly cloudy. Waves
1 to 2 feet.
.FRIDAY...Northwest wind 10 to 15 knots. Gusts up to 25 knots.
Sunny. Waves 1 to 2 feet.
.FRIDAY NIGHT...Northwest wind 5 to 10 knots becoming southwest
early in the morning. Partly cloudy. Waves 1 foot or less.

$$

LSZ141-202300-
Grand Marais to Taconite Harbor MN-
851 AM CST Thu Nov 20 2025

.REST OF TODAY...Southwest wind 10 to 15 knots becoming west 5 to
10 knots with gusts to around 20 knots in the afternoon. Patchy
fog early in the morning. Chance of rain and drizzle early in the
morning. Waves 1 to 3 feet.
.TONIGHT...West wind 10 to 15 knots with gusts to around
20 knots. Partly cloudy. Waves 1 to 2 feet.
.FRIDAY...Northwest wind 5 to 10 knots. Gusts up to 20 knots in
the morning. Sunny. Waves 1 to 2 feet.
.FRIDAY NIGHT...Northwest wind 5 knots in the evening becoming
variable 10 knots or less, then becoming southwest 5 knots early
in the morning. Partly cloudy. Waves 1 foot or less.

$$

LSZ142-202300-
Taconite Harbor to Silver Bay Harbor MN-
851 AM CST Thu Nov 20 2025

.REST OF TODAY...Southwest wind 5 to 10 knots becoming west with
gusts to around 20 knots in the afternoon. Patchy fog early in
the morning. Chance of drizzle early in the morning. Waves 1 to
2 feet.
.TONIGHT...West wind 5 to 10 knots with gusts to around 20 knots.
Mostly clear. Waves 1 foot or less.
.FRIDAY...Northwest wind 5 to 10 knots. Gusts up to 20 knots in
the morning. Sunny. Waves 1 foot or less.
.FRIDAY NIGHT...Northwest wind 5 knots early in the evening
becoming variable 10 knots or less, then becoming southwest
5 knots early in the morning. Partly cloudy. Waves 1 foot or
less.

$$

LSZ143-202300-
Silver Bay Harbor to Two Harbors MN-
851 AM CST Thu Nov 20 2025

.REST OF TODAY...Southwest wind 10 to 15 knots becoming west in
the afternoon. Patchy fog early in the morning. Chance of drizzle
early in the morning. Waves 1 to 2 feet.
.TONIGHT...West wind 10 to 15 knots. Gusts up to 20 knots in the
late evening and overnight. Mostly clear. Waves 1 to 2 feet.
.FRIDAY...Northwest wind 5 to 10 knots. Gusts up to 20 knots
early in the morning. Sunny. Waves 1 foot or less.
.FRIDAY NIGHT...Northwest wind 5 knots becoming southwest early
in the morning. Partly cloudy. Waves 1 foot or less.

$$

LSZ144-202300-
Two Harbors to Duluth MN-
851 AM CST Thu Nov 20 2025

.REST OF TODAY...Southwest wind 10 knots becoming west with gusts
to around 20 knots in the late morning and afternoon. Patchy fog
early in the morning. Chance of drizzle early in the morning.
Waves 1 to 2 feet.
.TONIGHT...West wind 10 to 15 knots. Gusts up to 20 knots in the
late evening and overnight. Partly cloudy. Waves 1 to 2 feet.
.FRIDAY...Northwest wind 5 to 10 knots. Sunny. Waves 1 foot or
less.
.FRIDAY NIGHT...Northwest wind 5 knots becoming southwest after
midnight. Partly cloudy. Waves 1 foot or less.

$$

LSZ145-202300-
Duluth MN to Port Wing WI-
851 AM CST Thu Nov 20 2025

.REST OF TODAY...Southwest wind 10 to 15 knots with gusts to
around 20 knots becoming west with gusts to around 20 knots in
the afternoon. Patchy fog early in the morning. Chance of drizzle
early in the morning. Slight chance of drizzle late in the
morning. Waves 1 to 2 feet.
.TONIGHT...West wind 10 to 15 knots with gusts to around
20 knots. Mostly cloudy in the evening then clearing. Waves 1 to
3 feet.
.FRIDAY...Northwest wind 10 to 15 knots easing to 5 knots in the
afternoon. Sunny. Waves 1 to 2 feet.
.FRIDAY NIGHT...West wind 5 knots becoming south after midnight.
Partly cloudy in the evening then becoming mostly cloudy. Waves
1 foot or less.

$$

LSZ146-202300-
Port Wing to Sand Island WI-
851 AM CST Thu Nov 20 2025

.REST OF TODAY...Southwest wind 10 to 15 knots becoming west
late. Gusts up to 20 knots. Patchy fog early in the morning.
Chance of drizzle early in the morning. Waves 1 to 3 feet.
.TONIGHT...West wind 10 to 15 knots with gusts to around
20 knots. Mostly cloudy in the evening then clearing. Waves 1 to
2 feet building to 2 to 4 feet in the late evening and overnight.
.FRIDAY...Northwest wind 10 to 15 knots with gusts to around
20 knots easing to 5 knots in the afternoon. Sunny. Waves 1 to
2 feet.
.FRIDAY NIGHT...Northwest wind 5 knots becoming southwest after
midnight. Partly cloudy in the evening then becoming mostly
cloudy. Waves 1 foot or less.

$$

LSZ147-202300-
Sand Island to Bayfield WI-
851 AM CST Thu Nov 20 2025

.REST OF TODAY...Southwest wind 10 to 15 knots becoming west in
the afternoon. Gusts up to 20 knots. Patchy fog early in the
morning. Chance of drizzle early in the morning. Waves 1 to
2 feet building to 1 to 3 feet in the late morning and afternoon.
.TONIGHT...West wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots early in the morning. Mostly cloudy in the
evening then clearing. Waves 1 to 3 feet building to 2 to 4 feet
in the late evening and overnight. A small craft advisory may be
needed.
.FRIDAY...Northwest wind 10 to 15 knots with gusts to around
20 knots easing to 5 knots late in the afternoon. Sunny. Waves
1 to 3 feet.
.FRIDAY NIGHT...Northwest wind 5 knots becoming southwest after
midnight. Partly cloudy. Waves 1 foot or less.

$$

LSZ150-202300-
Outer Apostle Islands Beyond 5 NM from Mainland-
851 AM CST Thu Nov 20 2025

.REST OF TODAY...Southwest wind 15 to 20 knots becoming west in
the afternoon. Patchy fog early in the morning. Chance of rain
and drizzle early in the morning. Slight chance of rain and
drizzle late in the morning. Waves 2 to 4 feet.
.TONIGHT...West wind 15 to 20 knots. Gusts up to 20 knots
increasing to 25 knots after midnight. Mostly cloudy in the
evening then becoming partly cloudy. Waves 3 to 5 feet. A small
craft advisory may be needed.
.FRIDAY...Northwest wind 10 to 15 knots. Gusts up to 20 knots in
the morning. Mostly sunny. Waves 2 to 4 feet subsiding to 1 to
3 feet in the late morning and afternoon.
.FRIDAY NIGHT...Northwest wind 5 knots becoming southwest after
midnight. Partly cloudy. Waves 1 foot or less.

$$

LSZ121-202300-
Chequamegon Bay-Bayfield to Oak Point WI-
851 AM CST Thu Nov 20 2025

.REST OF TODAY...Southwest wind 5 knots rising to 10 to 15 knots
with gusts to around 20 knots late in the morning, then becoming
west 5 to 10 knots with gusts to around 20 knots in the
afternoon. Chance of drizzle early in the morning. Waves 1 foot
or less.
.TONIGHT...West wind 10 to 15 knots with gusts to around
20 knots. Mostly cloudy in the evening then becoming partly
cloudy. Waves 1 foot or less.
.FRIDAY...Northwest wind 5 to 10 knots. Sunny. Waves 1 foot or
less.
.FRIDAY NIGHT...West wind 5 knots becoming southwest after
midnight. Partly cloudy. Waves 1 foot or less.

$$

LSZ148-202300-
Oak Point to Saxon Harbor WI-
851 AM CST Thu Nov 20 2025

.REST OF TODAY...Southwest wind 10 to 15 knots with gusts to
around 20 knots becoming west with gusts to around 20 knots in
the afternoon. Patchy fog early in the morning. Chance of drizzle
early in the morning. Waves 1 to 2 feet.
.TONIGHT...West wind 10 to 15 knots with gusts to around
20 knots. Mostly cloudy in the evening then becoming partly
cloudy. Waves 1 to 2 feet.
.FRIDAY...Northwest wind 10 to 15 knots with gusts to around
20 knots easing to 5 knots late in the afternoon. Mostly sunny.
Waves 1 to 2 feet.
.FRIDAY NIGHT...West wind 5 knots becoming southwest after
midnight. Partly cloudy. Waves 1 foot or less.

$$

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

WFO DLH