589
FZUS53 KDLH 222037
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
337 PM CDT Fri Aug 22 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.

LSZ140-141-230415-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
337 PM CDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM CDT THIS EVENING
THROUGH SATURDAY EVENING...

.TONIGHT...Southwest wind 5 to 10 knots becoming west 10 to
15 knots with gusts to around 25 knots after midnight. Slight
chance of thunderstorms after midnight. Slight chance of rain
showers after midnight. Waves 1 to 2 feet.
.SATURDAY...West wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots in the late morning and afternoon. Chance
of sprinkles in the afternoon. Waves 1 to 3 feet.
.SATURDAY NIGHT...Northwest wind 10 to 15 knots with gusts to
around 20 knots. Partly cloudy in the evening then becoming
mostly cloudy. Waves 1 to 3 feet.
.SUNDAY...Northwest wind 15 to 20 knots with gusts to around
25 knots. Slight chance of rain showers in the morning, then
chance of rain showers in the afternoon. Waves 1 to 3 feet.

$$

LSZ142-143-230415-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
337 PM CDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM CDT THIS EVENING
THROUGH SATURDAY EVENING...

.TONIGHT...Southwest wind 5 to 10 knots becoming west 10 to
15 knots with gusts to around 25 knots late in the night. Partly
cloudy. Waves 1 foot or less.
.SATURDAY...West wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots in the late morning and early afternoon,
then increasing to 25 knots late in the afternoon. Chance of
sprinkles in the afternoon. Waves 1 to 2 feet.
.SATURDAY NIGHT...Northwest wind 10 to 15 knots with gusts to
around 20 knots. Chance of sprinkles in the evening. Waves 1 to
2 feet.
.SUNDAY...Northwest wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots in the late morning and afternoon. Slight
chance of rain showers in the afternoon. Waves 1 to 2 feet.

$$

LSZ144-145-230415-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
337 PM CDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM CDT THIS EVENING
THROUGH SATURDAY EVENING...

.TONIGHT...Southwest wind 5 to 10 knots becoming west 10 to
15 knots with gusts to around 20 knots after midnight. Partly
cloudy. Waves 1 to 2 feet.
.SATURDAY...West wind 10 to 15 knots with gusts to around
20 knots. Chance of sprinkles in the afternoon. Waves 1 to
3 feet.
.SATURDAY NIGHT...Northwest wind 10 to 15 knots with gusts to
around 20 knots. Partly cloudy in the evening then becoming
mostly cloudy. Waves 1 to 3 feet.
.SUNDAY...Northwest wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots in the afternoon. Slight chance of rain
showers in the afternoon. Waves 1 to 3 feet.

$$

LSZ146-230415-
Port Wing to Sand Island WI-
337 PM CDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM CDT THIS EVENING
THROUGH SATURDAY EVENING...

.TONIGHT...Southwest wind 10 knots becoming west with gusts to
around 20 knots in the late evening and early morning, then
rising to 15 to 20 knots with gusts to around 25 knots late in
the night. Partly cloudy. Waves 1 to 2 feet building to 1 to
3 feet late in the night.
.SATURDAY...West wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots in the late morning and afternoon. Slight
chance of rain showers in the afternoon. Waves 1 to 3 feet.
.SATURDAY NIGHT...Northwest wind 10 to 15 knots with gusts to
around 20 knots. Slight chance of rain showers. Waves 1 to
3 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 through the day. Waves 1 to 3 feet.

$$

LSZ147-230415-
Sand Island to Bayfield WI-
337 PM CDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM CDT THIS EVENING
THROUGH SATURDAY EVENING...

.TONIGHT...Southwest wind 10 to 15 knots becoming west 15 to
20 knots with gusts to around 25 knots after midnight. Mostly
clear. Waves 1 to 2 feet building to 1 to 3 feet late in the
night.
.SATURDAY...West wind 15 to 20 knots with gusts to around
25 knots easing to 10 to 15 knots with gusts to around 25 knots
in the afternoon. Slight chance of rain showers in the afternoon.
Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon.
.SATURDAY NIGHT...Northwest wind 10 to 15 knots. Gusts up to
25 knots decreasing to 20 knots in the late evening and
overnight. Slight chance of rain showers. Waves 1 to 3 feet.
.SUNDAY...Northwest wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots in the late morning and afternoon. Slight
chance of rain showers. Waves 1 to 3 feet.

$$

LSZ150-230415-
Outer Apostle Islands Beyond 5 NM from Mainland-
337 PM CDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM CDT THIS EVENING
THROUGH SATURDAY EVENING...

.TONIGHT...Southwest wind 10 to 15 knots with gusts to around
20 knots becoming west 15 to 20 knots with gusts to around
25 knots after midnight. Slight chance of showers and
thunderstorms early in the evening. Waves 1 to 3 feet building to
2 to 4 feet late in the night.
.SATURDAY...West wind 15 to 20 knots with gusts to around
25 knots. Slight chance of showers in the afternoon. Waves 2 to
4 feet.
.SATURDAY NIGHT...Northwest wind 15 to 20 knots with gusts to
around 25 knots. Slight chance of rain showers. Waves 2 to
4 feet.
.SUNDAY...Northwest wind 15 to 20 knots. Gusts up to 25 knots
decreasing to 20 knots late in the afternoon. Slight chance of
rain showers. Waves 2 to 4 feet. A small craft advisory may be
needed.

$$

LSZ121-230415-
Chequamegon Bay-Bayfield to Oak Point WI-
337 PM CDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM CDT THIS EVENING
THROUGH SATURDAY EVENING...

.TONIGHT...Southwest wind 5 to 10 knots becoming west 10 to
15 knots with gusts to around 20 knots after midnight. Mostly
clear. Waves 1 foot or less.
.SATURDAY...West wind 10 to 15 knots with gusts to around
20 knots. Slight chance of rain showers in the afternoon. Waves
1 foot or less.
.SATURDAY NIGHT...Northwest wind 10 to 15 knots with gusts to
around 20 knots. Slight chance of rain showers. Waves 1 foot or
less.
.SUNDAY...Northwest wind 10 to 15 knots with gusts to around
20 knots. Slight chance of rain showers in the morning, then
chance of rain showers and slight chance of thunderstorms in the
afternoon. Waves 1 foot or less.

$$

LSZ148-230415-
Oak Point to Saxon Harbor WI-
337 PM CDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM CDT THIS EVENING
THROUGH SATURDAY EVENING...

.TONIGHT...Southwest wind 10 to 15 knots with gusts to around
20 knots becoming west with gusts to around 20 knots late in the
night. Slight chance of showers and thunderstorms in the evening.
Waves 1 to 2 feet.
.SATURDAY...West wind 15 to 20 knots. Gusts up to 20 knots
increasing to 25 knots late in the afternoon. Slight chance of
rain showers in the afternoon. Waves 1 to 3 feet.
.SATURDAY NIGHT...Northwest wind 10 to 15 knots with gusts to
around 20 knots. Slight chance of rain showers through the night.
Waves 1 to 2 feet.
.SUNDAY...Northwest wind 10 to 15 knots with gusts to around
20 knots. Chance of rain showers through the day. Slight chance
of thunderstorms in the afternoon. Waves 1 to 3 feet.

$$

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

Huyck