818
FZUS53 KDLH 200239
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
939 PM CDT Sat Apr 19 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.

LSZ140-141-201015-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
939 PM CDT Sat Apr 19 2025

.REST OF TONIGHT...West wind 5 to 10 knots becoming north after
midnight, then becoming east toward daybreak. Mostly clear. Waves
1 foot or less.
.SUNDAY...Southeast wind 5 to 10 knots. Mostly sunny. Waves
1 foot or less.
.SUNDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to
20 knots in the evening then 20 knots early in the morning.
Chance of rain and slight chance of snow after midnight. Waves
1 to 3 feet.
.MONDAY...Northeast wind 15 to 20 knots becoming north 10 to
15 knots late in the afternoon. Snow likely in the morning. Rain
likely through the day. Slight chance of snow in the afternoon.
Waves 2 to 4 feet.

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

$$

LSZ142-143-201015-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
939 PM CDT Sat Apr 19 2025

.REST OF TONIGHT...East wind 5 knots late in the evening becoming
variable 10 knots or less. Mostly clear. Waves 1 foot or less.
.SUNDAY...East wind 10 to 15 knots with gusts to around 20 knots.
Mostly sunny. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northeast wind 15 to 20 knots. 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...North wind 10 to 15 knots. Gusts up to 20 knots until
late afternoon. Slight chance of snow in the morning. Rain likely
through the day. Waves 2 to 4 feet subsiding to 1 to 3 feet late
in the afternoon.

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

$$

LSZ144-145-201015-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
939 PM CDT Sat Apr 19 2025

.REST OF TONIGHT...Southeast wind 5 knots becoming east toward
daybreak. Mostly clear. Waves 1 foot or less.
.SUNDAY...East wind 10 to 15 knots with gusts to around 20 knots.
Mostly sunny. Waves 1 to 3 feet.
.SUNDAY NIGHT...Northeast wind 15 to 20 knots. Chance of rain in
the evening, then rain likely and slight chance of snow after
midnight. Waves 2 to 4 feet. A small craft advisory may be
needed.
.MONDAY...Northeast wind 15 to 20 knots with gusts to around
25 knots becoming north 5 to 10 knots late in the afternoon. Rain
likely and slight chance of snow in the morning, then chance of
rain in the afternoon. Waves 2 to 4 feet. A small craft advisory
may be needed.

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

$$

LSZ146-201015-
Port Wing to Sand Island WI-
939 PM CDT Sat Apr 19 2025

.REST OF TONIGHT...South wind 5 knots late in the evening
becoming variable 10 knots or less. Mostly clear. Waves 1 foot or
less.
.SUNDAY...Southeast wind 5 knots becoming northeast 10 to
15 knots with gusts to around 20 knots in the late morning and
afternoon. Mostly sunny. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northeast wind 15 to 20 knots. Chance of rain in
the evening, then rain likely 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 becoming north 10 to
15 knots with gusts to around 20 knots in the late morning and
afternoon. Snow likely in the morning. Rain likely through the
day. Waves 3 to 5 feet. A small craft advisory may be needed.

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

$$

LSZ147-201015-
Sand Island to Bayfield WI-
939 PM CDT Sat Apr 19 2025

.REST OF TONIGHT...South wind 5 knots. Clear. Waves 1 foot or
less.
.SUNDAY...South wind 5 knots becoming east in the afternoon.
Mostly sunny. Waves 1 to 2 feet.
.SUNDAY NIGHT...East wind 10 to 15 knots. Gusts up to 20 knots
early in the evening then 20 knots early in the morning. Chance
of rain through the night. Waves 1 to 2 feet building to 1 to
3 feet early in the morning.
.MONDAY...Northeast wind 15 to 20 knots becoming north 5 to
10 knots late in the afternoon. Rain and snow likely in the
morning, then chance of rain and slight chance of snow in the
afternoon. Waves 3 to 5 feet. A small craft advisory may be
needed.

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

$$

LSZ121-201015-
Chequamegon Bay-Bayfield to Oak Point WI-
939 PM CDT Sat Apr 19 2025

.REST OF TONIGHT...Variable winds 10 knots or less becoming south
5 knots after midnight. Clear. Waves 1 foot or less.
.SUNDAY...South wind 5 knots becoming east in the afternoon.
Sunny in the morning then becoming partly sunny. Waves 1 foot or
less.
.SUNDAY NIGHT...Northeast wind 10 to 15 knots. Chance of rain
through the night. Waves 1 to 2 feet.
.MONDAY...North wind 10 to 15 knots with gusts to around
20 knots. Rain in the morning. Slight chance of snow through the
day. Chance of rain in the afternoon. Waves 1 to 2 feet.

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

$$

LSZ148-201015-
Oak Point to Saxon Harbor WI-
939 PM CDT Sat Apr 19 2025

.REST OF TONIGHT...South wind 5 knots. Clear. Waves 1 foot or
less.
.SUNDAY...South wind 5 to 10 knots becoming east 10 to 15 knots
in the afternoon. Mostly sunny. Waves 1 to 2 feet.
.SUNDAY NIGHT...East wind 10 to 15 knots. Gusts up to 20 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
25 knots becoming north 10 to 15 knots with gusts to around
20 knots late in the afternoon. Rain and snow. Waves 4 to 6 feet.
Waves occasionally to 8 feet. A small craft advisory may be
needed.

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

$$

LSZ150-201015-
Outer Apostle Islands Beyond 5 NM from Mainland-
939 PM CDT Sat Apr 19 2025

.REST OF TONIGHT...South wind 5 knots. Clear. Waves 1 foot or
less.
.SUNDAY...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 2 feet.
.SUNDAY NIGHT...East wind 15 to 20 knots. Gusts up to 20 knots
early in the evening. Chance of rain through the night. Waves
1 to 3 feet.
.MONDAY...Northeast wind 15 to 20 knots with gusts to around
25 knots becoming north 10 to 15 knots with gusts to around
20 knots late in the afternoon. Rain likely in the morning.
Slight chance of snow through the day. Chance of rain in the
afternoon. Waves 4 to 7 feet. Waves occasionally to 9 feet. 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

BJH