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FZUS53 KDLH 202111
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
311 PM 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.

LSZ140-210500-
Grand Portage to Grand Marais MN-
311 PM CST Thu Nov 20 2025

.TONIGHT...West wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots late in the night. 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.
.SATURDAY...Southwest wind 10 to 15 knots. Gusts up to 20 knots
in the late morning and afternoon. Slight chance of snow in the
morning. Slight chance of rain through the day. Waves 1 to
3 feet.

$$

LSZ141-210500-
Grand Marais to Taconite Harbor MN-
311 PM CST Thu Nov 20 2025

.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. Mostly clear in the evening then becoming mostly
cloudy. Waves 1 foot or less.
.SATURDAY...Southwest wind 5 to 10 knots. Mostly cloudy. Waves
1 foot or less.

$$

LSZ142-210500-
Taconite Harbor to Silver Bay Harbor MN-
311 PM CST Thu Nov 20 2025

.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.
.SATURDAY...Southwest wind 5 knots becoming west late in the
afternoon. Mostly cloudy. Waves 1 foot or less.

$$

LSZ143-210500-
Silver Bay Harbor to Two Harbors MN-
311 PM CST Thu Nov 20 2025

.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. Gusts up to 20 knots
early 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 west 5 knots
after midnight becoming southwest. Mostly clear in the evening
then becoming mostly cloudy. Waves 1 foot or less.
.SATURDAY...Southwest wind 5 to 10 knots becoming west late in
the afternoon. Partly sunny. Waves 1 foot or less.

$$

LSZ144-210500-
Two Harbors to Duluth MN-
311 PM CST Thu Nov 20 2025

.TONIGHT...West wind 10 to 15 knots. Gusts up to 20 knots in the
late evening and overnight. Mostly cloudy early in the evening
then clearing. 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. Mostly clear in the evening then becoming mostly
cloudy. Waves 1 foot or less.
.SATURDAY...Southwest wind 5 to 10 knots becoming west late in
the afternoon. Mostly cloudy in the morning then becoming mostly
sunny. Waves 1 foot or less.

$$

LSZ145-210500-
Duluth MN to Port Wing WI-
311 PM CST Thu Nov 20 2025

.TONIGHT...West wind 10 to 15 knots with gusts to around
20 knots. Mostly cloudy early 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...Northwest wind 5 knots becoming south after
midnight. Mostly clear in the evening then becoming mostly
cloudy. Waves 1 foot or less.
.SATURDAY...Southwest wind 5 to 10 knots. Mostly cloudy in the
morning then becoming mostly sunny. Waves 1 foot or less.

$$

LSZ146-210500-
Port Wing to Sand Island WI-
311 PM CST Thu Nov 20 2025

.TONIGHT...West wind 10 to 15 knots with gusts to around
20 knots. Mostly cloudy early in the evening then becoming partly
cloudy. 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
3 feet subsiding to 1 to 2 feet in the late morning and
afternoon.
.FRIDAY NIGHT...Northwest wind 5 knots early in the evening
becoming variable 10 knots or less, then becoming southwest
5 knots after midnight. Mostly clear in the evening then becoming
mostly cloudy. Waves 1 foot or less.
.SATURDAY...South wind 5 to 10 knots becoming southwest in the
afternoon. Mostly cloudy. Waves 1 foot or less.

$$

LSZ147-210500-
Sand Island to Bayfield WI-
311 PM CST Thu Nov 20 2025

.TONIGHT...West wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots late in the night. Mostly cloudy early in
the evening then becoming partly cloudy. Waves 1 to 3 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 late in the afternoon. Sunny. Waves
1 to 3 feet subsiding to 1 to 2 feet in the late morning and
afternoon.
.FRIDAY NIGHT...West wind 5 knots becoming southwest after
midnight. Partly cloudy. Waves 1 foot or less.
.SATURDAY...Southwest wind 5 to 10 knots. Mostly cloudy. Waves
1 foot or less.

$$

LSZ150-210500-
Outer Apostle Islands Beyond 5 NM from Mainland-
311 PM CST Thu Nov 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM CST THIS EVENING
THROUGH FRIDAY MORNING...

.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.
.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 afternoon.
.FRIDAY NIGHT...Northwest wind 5 knots becoming southwest after
midnight. Partly cloudy in the evening then becoming mostly
cloudy. Waves 1 foot or less.
.SATURDAY...Southwest wind 5 to 10 knots. Mostly cloudy. Waves
1 foot or less.

$$

LSZ121-210500-
Chequamegon Bay-Bayfield to Oak Point WI-
311 PM CST Thu Nov 20 2025

.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.
.SATURDAY...Southwest wind 5 to 10 knots. Partly sunny. Waves
1 foot or less.

$$

LSZ148-210500-
Oak Point to Saxon Harbor WI-
311 PM CST Thu Nov 20 2025

.TONIGHT...West wind 10 to 15 knots with gusts to around
20 knots. Mostly cloudy until early morning 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 early in the
morning. Partly cloudy. Waves 1 foot or less.
.SATURDAY...Southwest wind 5 to 10 knots. Mostly cloudy. Waves
1 foot or less.

$$

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

WFO DLH