039
FZUS53 KDLH 200818
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
318 AM CDT Sun Apr 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.

LSZ140-141-201700-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
318 AM CDT Sun Apr 20 2025

.TODAY...East wind 5 to 10 knots. Mostly sunny. Waves 1 to
2 feet.
.TONIGHT...Northeast wind 10 to 15 knots with gusts to around
20 knots. Chance of rain and snow likely after midnight. Waves
1 to 3 feet.
.MONDAY...Northeast wind 15 to 20 knots becoming north late in
the afternoon. Gusts up to 25 knots. Rain and snow in the
morning, then rain likely and slight chance of snow in the
afternoon. Waves 2 to 4 feet.
.MONDAY NIGHT...Northwest wind 10 to 15 knots. Gusts up to
20 knots until early morning. Rain likely in the evening. Waves
1 to 3 feet.

Note...Wave height forecasts are for ice free areas.

$$

LSZ142-143-201700-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
318 AM CDT Sun Apr 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
MONDAY AFTERNOON...

.TODAY...East wind 10 to 15 knots with gusts to around 20 knots.
Mostly sunny. Waves 1 to 2 feet building to 1 to 3 feet late in
the afternoon.
.TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 20 knots
increasing to 25 knots early in the morning. Slight chance of
rain in the evening, then chance of rain and slight chance of
snow after midnight. Waves 1 to 3 feet building to 2 to 4 feet
after midnight.
.MONDAY...Northeast wind 15 to 20 knots with gusts to around
25 knots becoming north 5 to 10 knots with gusts to around
20 knots late in the afternoon. Snow in the morning. Rain through
the day. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the
afternoon.
.MONDAY NIGHT...Northwest wind 5 to 10 knots. Partly cloudy.
Waves 1 to 2 feet.

Note...Wave height forecasts are for ice free areas.

$$

LSZ144-145-201700-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
318 AM CDT Sun Apr 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH
MONDAY MORNING...

.TODAY...East wind 5 to 10 knots increasing to 15 to 20 knots
with gusts to around 25 knots this afternoon. Mostly sunny. Waves
1 to 2 feet building to 1 to 3 feet late in the afternoon.
.TONIGHT...Northeast wind 15 to 20 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 rain
in the evening, then rain after midnight. Waves 2 to 4 feet.
.MONDAY...Northeast wind 15 to 20 knots with gusts to around
25 knots becoming north 5 to 10 knots with gusts to around
20 knots late in the afternoon. Rain and snow in the morning,
then chance of rain in the afternoon. Waves 2 to 4 feet.
.MONDAY NIGHT...North wind 5 to 10 knots becoming northwest late
in the evening, then becoming west after midnight becoming south
early in the morning. Mostly clear. Waves 1 to 2 feet.

Note...Wave height forecasts are for ice free areas.

$$

LSZ146-201700-
Port Wing to Sand Island WI-
318 AM CDT Sun Apr 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
MONDAY AFTERNOON...

.TODAY...Southeast wind 5 knots becoming east late in the
morning, then becoming northeast 10 to 15 knots with gusts to
around 20 knots in the afternoon. Mostly sunny. Waves 1 to 2 feet
building to 1 to 3 feet late in the afternoon.
.TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 20 knots
early in the evening then 25 knots early in the morning. Chance
of rain in the evening, then rain after midnight. Waves 1 to
3 feet building to 2 to 4 feet after midnight.
.MONDAY...Northeast wind 15 to 20 knots with gusts to around
30 knots becoming north 5 to 10 knots with gusts to around
20 knots late in the afternoon. Rain and snow. Waves 3 to 5 feet.
.MONDAY NIGHT...West wind 5 to 10 knots becoming south early in
the morning. Partly cloudy. Waves 1 to 3 feet subsiding to 1 to
2 feet in the late evening and overnight.

Note...Wave height forecasts are for ice free areas.

$$

LSZ147-201700-
Sand Island to Bayfield WI-
318 AM CDT Sun Apr 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
MONDAY AFTERNOON...

.TODAY...South wind 5 knots becoming east 10 to 15 knots with
gusts to around 20 knots in the afternoon. Mostly sunny. Waves
1 to 2 feet.
.TONIGHT...East wind 15 to 20 knots. Gusts up to 20 knots early
in the evening then 25 knots early in the morning. Chance of rain
in the evening, then rain and slight chance of snow after
midnight. Waves 1 to 2 feet building to 1 to 3 feet early in the
morning.
.MONDAY...Northeast wind 15 to 20 knots with gusts to around
30 knots becoming north 10 to 15 knots with gusts to around
20 knots late in the afternoon. Rain and snow. Waves 3 to 5 feet.
Waves occasionally to 7 feet.
.MONDAY NIGHT...West wind 5 to 10 knots becoming southwest early
in the morning. Partly cloudy. Waves 1 to 3 feet subsiding to
1 to 2 feet in the late evening and overnight.

Note...Wave height forecasts are for ice free areas.

$$

LSZ121-201700-
Chequamegon Bay-Bayfield to Oak Point WI-
318 AM CDT Sun Apr 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
MONDAY AFTERNOON...

.TODAY...South wind 5 to 10 knots becoming east with gusts to
around 20 knots in the afternoon. Mostly sunny. Waves 1 to
2 feet.
.TONIGHT...Northeast wind 5 to 10 knots with gusts to around
20 knots rising to 15 to 20 knots with gusts to around 25 knots
early in the morning. Chance of rain in the evening, then rain
after midnight. Waves 1 to 2 feet.
.MONDAY...North wind 15 to 20 knots with gusts to around 25 knots
easing to 10 to 15 knots with gusts to around 20 knots late in
the afternoon. Rain and snow. Waves 1 to 2 feet.
.MONDAY NIGHT...Northwest wind 5 to 10 knots becoming southwest
after midnight. Partly cloudy. Waves 1 foot or less.

Note...Wave height forecasts are for ice free areas.

$$

LSZ148-201700-
Oak Point to Saxon Harbor WI-
318 AM CDT Sun Apr 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
MONDAY AFTERNOON...

.TODAY...South wind 5 to 10 knots becoming east 10 to 15 knots
with gusts to around 20 knots in the afternoon. Mostly sunny.
Waves 1 to 3 feet.
.TONIGHT...East wind 15 to 20 knots. Gusts up to 20 knots early
in the evening then 25 knots early in the morning. Chance of rain
in the evening, then rain after midnight. Waves 1 to 3 feet.
.MONDAY...Northeast wind 15 to 20 knots with gusts to around
30 knots becoming north 10 to 15 knots with gusts to around
25 knots late in the afternoon. Rain in the morning. Snow through
the day. Rain likely in the afternoon. Waves 4 to 6 feet. Waves
occasionally to 8 feet.
.MONDAY NIGHT...Northwest wind 5 to 10 knots becoming southwest
after midnight. Rain likely in the evening. Waves 3 to 5 feet
subsiding to 1 to 3 feet after midnight. A small craft advisory
may be needed.

Note...Wave height forecasts are for ice free areas.

$$

LSZ150-201700-
Outer Apostle Islands Beyond 5 NM from Mainland-
318 AM CDT Sun Apr 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
MONDAY AFTERNOON...

.TODAY...South wind 5 to 10 knots becoming east 10 to 15 knots
with gusts to around 20 knots in the afternoon. Mostly sunny.
Waves 1 to 3 feet.
.TONIGHT...East wind 15 to 20 knots. Gusts up to 20 knots in the
evening then 25 knots early in the morning. Chance of rain in the
evening, then rain after midnight. Waves 1 to 3 feet.
.MONDAY...Northeast wind 20 to 25 knots with gusts to around
30 knots becoming north 10 to 15 knots with gusts to around
25 knots late in the afternoon. Rain and snow. Waves 4 to 7 feet.
Waves occasionally to 9 feet.
.MONDAY NIGHT...Northwest wind 10 to 15 knots. Partly cloudy.
Waves 3 to 5 feet subsiding to 1 to 3 feet after midnight. A
small craft advisory may be needed.

Note...Wave height forecasts are for ice free areas.

$$

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

Melde