066
FZUS53 KDLH 160856
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
356 AM CDT Sat Aug 16 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.

LSZ140-141-161615-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
356 AM CDT Sat Aug 16 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
SUNDAY MORNING...
...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
EVENING...

.TODAY...Northeast wind 10 to 15 knots. Slight chance of rain
showers until late afternoon. Waves 1 to 2 feet.
.TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots.
Partly cloudy. Waves 1 to 2 feet building to 2 to 4 feet after
midnight.
.SUNDAY...East wind 15 to 20 knots. Gusts up to 25 knots
increasing to 30 knots in the late morning and afternoon. Sunny
in the morning then becoming partly sunny. Waves 4 to 7 feet.
Waves occasionally to 9 feet.
.SUNDAY NIGHT...East wind 15 to 20 knots. Gusts up to 30 knots
decreasing to 25 knots early in the morning. Chance of rain
showers in the evening, then rain showers likely and slight
chance of thunderstorms after midnight. Waves 4 to 6 feet. Waves
occasionally to 8 feet. A small craft advisory may be needed.

$$

LSZ142-143-161615-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
356 AM CDT Sat Aug 16 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
SUNDAY MORNING...
...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
EVENING...

.TODAY...Northeast wind 15 to 20 knots. Slight chance of showers
early in the morning. Slight chance of thunderstorms in the
morning. Chance of showers in the late morning and early
afternoon. Waves 1 to 2 feet building to 1 to 3 feet in the
afternoon.
.TONIGHT...Northeast wind 15 to 20 knots with gusts to around
25 knots. Partly cloudy. Waves 1 to 3 feet building to 3 to
5 feet after midnight.
.SUNDAY...East wind 20 to 25 knots. Gusts up to 30 knots
increasing to 35 knots late in the afternoon. Slight chance of
rain showers in the afternoon. Waves 4 to 7 feet. Waves
occasionally to 10 feet. A gale warning may be needed.
.SUNDAY NIGHT...East wind 15 to 20 knots. Gusts up to 30 knots
decreasing to 25 knots early in the morning. Chance of rain
showers and slight chance of thunderstorms in the evening, then
rain showers and chance of thunderstorms after midnight. Waves
4 to 7 feet. Waves occasionally to 9 feet. A small craft advisory
may be needed.

$$

LSZ144-145-161615-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
356 AM CDT Sat Aug 16 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
SUNDAY MORNING...
...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
EVENING...

.TODAY...Northeast wind 15 to 20 knots. Showers likely and slight
chance of thunderstorms in the morning, then chance of showers in
the afternoon. Waves 1 to 2 feet building to 2 to 4 feet in the
late morning and afternoon.
.TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 20 knots
increasing to 25 knots after midnight. Partly cloudy. Waves 1 to
3 feet building to 3 to 5 feet after midnight.
.SUNDAY...East wind 20 to 25 knots. Gusts up to 30 knots
increasing to 35 knots late in the afternoon. Slight chance of
rain showers in the morning, then chance of rain showers in the
afternoon. Waves 4 to 7 feet. Waves occasionally to 10 feet. A
gale warning may be needed.
.SUNDAY NIGHT...East wind 20 to 25 knots with gusts to around
30 knots easing to 10 to 15 knots with gusts to around 25 knots
early in the morning. Patchy fog through the night. Showers
likely in the evening. Chance of thunderstorms through the night.
Showers after midnight. Waves 4 to 7 feet subsiding to 3 to
5 feet early in the morning. Waves occasionally to 9 feet. A
small craft advisory may be needed.

$$

LSZ146-161615-
Port Wing to Sand Island WI-
356 AM CDT Sat Aug 16 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
SUNDAY MORNING...
...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
EVENING...

.TODAY...Northeast wind 15 to 20 knots. Slight chance of
thunderstorms in the morning. Chance of showers until late
afternoon, then slight chance of showers late in the afternoon.
Waves 1 to 3 feet.
.TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots.
Partly cloudy. Waves 1 to 3 feet subsiding to 1 to 2 feet late in
the evening, then building to 3 to 5 feet after midnight.
.SUNDAY...East wind 15 to 20 knots. Gusts up to 25 knots
increasing to 30 knots in the late morning and afternoon. Chance
of showers in the afternoon. Waves 4 to 6 feet. Waves
occasionally to 8 feet.
.SUNDAY NIGHT...East wind 15 to 20 knots. Gusts up to 30 knots
decreasing to 20 knots. Showers likely in the evening. Chance of
thunderstorms through the night. Showers after midnight. Waves
4 to 6 feet subsiding to 2 to 4 feet early in the morning. Waves
occasionally to 8 feet. A small craft advisory may be needed.

$$

LSZ147-161615-
Sand Island to Bayfield WI-
356 AM CDT Sat Aug 16 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
SUNDAY MORNING...
...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
EVENING...

.TODAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots in
the late morning and afternoon. Chance of showers in the morning.
Slight chance of thunderstorms through the day. Slight chance of
showers in the afternoon. Waves 1 to 3 feet.
.TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots.
Partly cloudy. Waves 1 to 3 feet building to 3 to 5 feet after
midnight.
.SUNDAY...East wind 15 to 20 knots. Gusts up to 25 knots
increasing to 30 knots in the afternoon. Slight chance of showers
in the afternoon. Waves 4 to 6 feet. Waves occasionally to
8 feet.
.SUNDAY NIGHT...East wind 15 to 20 knots with gusts to around
30 knots easing to 10 knots with gusts to around 20 knots early
in the morning. Slight chance of showers and thunderstorms in the
evening, then showers and chance of thunderstorms after midnight.
Waves 4 to 6 feet subsiding to 1 to 3 feet early in the morning.
Waves occasionally to 8 feet. A small craft advisory may be
needed.

$$

LSZ150-161615-
Outer Apostle Islands Beyond 5 NM from Mainland-
356 AM CDT Sat Aug 16 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
SUNDAY MORNING...
...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
EVENING...

.TODAY...Northeast wind 15 to 20 knots. Chance of showers and
slight chance of thunderstorms through the day. Waves 1 to 2 feet
building to 2 to 4 feet in the late morning and afternoon.
.TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots
after midnight. Partly cloudy. Waves 4 to 6 feet. Waves
occasionally to 8 feet.
.SUNDAY...East wind 15 to 20 knots. Gusts up to 25 knots
increasing to 30 knots in the late morning and afternoon. Slight
chance of showers in the afternoon. Waves 5 to 8 feet. Waves
occasionally to 10 feet.
.SUNDAY NIGHT...East wind 15 to 20 knots. Gusts up to 30 knots
decreasing to 20 knots. Slight chance of showers and
thunderstorms in the evening, then showers and chance of
thunderstorms after midnight. Waves 4 to 7 feet subsiding to 3 to
5 feet early in the morning. Waves occasionally to 9 feet. A
small craft advisory may be needed.

$$

LSZ121-161615-
Chequamegon Bay-Bayfield to Oak Point WI-
356 AM CDT Sat Aug 16 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
SUNDAY MORNING...
...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
EVENING...

.TODAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots late
in the afternoon. Chance of thunderstorms in the morning. Chance
of showers through the day. Slight chance of thunderstorms in the
afternoon. Waves 1 to 2 feet.
.TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in
the late evening and overnight. Mostly cloudy in the evening then
clearing. Waves 1 to 3 feet.
.SUNDAY...East wind 15 to 20 knots. Gusts up to 20 knots
increasing to 25 knots in the afternoon. Chance of rain showers
in the afternoon. Waves 1 to 3 feet subsiding to 1 to 2 feet late
in the afternoon.
.SUNDAY NIGHT...East wind 15 to 20 knots with gusts to around
25 knots easing to 5 to 10 knots with gusts to around 20 knots
after midnight. Showers likely in the evening. Chance of
thunderstorms through the night. Showers after midnight. Patchy
fog after midnight. Waves 1 to 3 feet.

$$

LSZ148-161615-
Oak Point to Saxon Harbor WI-
356 AM CDT Sat Aug 16 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
SUNDAY MORNING...
...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
EVENING...

.TODAY...Northeast wind 15 to 20 knots. Patchy fog early in the
morning. Chance of thunderstorms in the morning. Chance of
showers through the day. Slight chance of thunderstorms in the
afternoon. Waves 1 foot or less building to 2 to 4 feet in the
late morning and afternoon.
.TONIGHT...Northeast wind 15 to 20 knots. Mostly cloudy in the
evening then clearing. Waves 2 to 4 feet.
.SUNDAY...East wind 15 to 20 knots. Gusts up to 25 knots in the
afternoon. Chance of showers in the afternoon. Waves 4 to 6 feet.
Waves occasionally to 8 feet.
.SUNDAY NIGHT...East wind 15 to 20 knots with gusts to around
25 knots becoming southeast 10 knots early in the morning.
Showers likely and chance of thunderstorms. Waves 4 to 6 feet
subsiding to 1 to 3 feet early in the morning. Waves occasionally
to 7 feet. A small craft advisory may be needed.

$$

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

HA