110
FZUS53 KDLH 181506
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
1006 AM CDT Mon Aug 18 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.

LSZ140-141-182215-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
1006 AM CDT Mon Aug 18 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 PM CDT THIS AFTERNOON...

.REST OF TODAY...East wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots late. Chance of rain showers. Waves 2 to
4 feet subsiding to 1 to 3 feet late.
.TONIGHT...Northeast wind 5 to 10 knots with gusts to around
20 knots becoming north after midnight. Slight chance of rain
showers in the evening. Patchy fog through the night. Waves 1 to
2 feet.
.TUESDAY...North wind 5 to 10 knots becoming northeast late in
the afternoon. Patchy fog in the morning. Waves 1 foot or less.
.TUESDAY NIGHT...North wind 5 knots. Partly cloudy. Waves 1 foot
or less.

$$

LSZ142-143-182215-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
1006 AM CDT Mon Aug 18 2025

.REST OF TODAY...East wind 5 to 10 knots. Gusts up to 20 knots in
the late morning and early afternoon. Chance of rain showers in
the late morning and early afternoon, then slight chance of rain
showers late. Waves 1 to 3 feet subsiding to 1 to 2 feet in the
afternoon.
.TONIGHT...Northeast wind 5 knots becoming west early in the
morning. Slight chance of showers in the evening. Patchy fog
through the night. Waves 1 to 2 feet.
.TUESDAY...Northwest wind 5 knots becoming northeast in the
afternoon. Patchy fog in the morning. Waves 1 foot or less.
.TUESDAY NIGHT...Northeast wind 5 knots early in the evening
becoming variable 10 knots or less, then becoming north 5 knots
after midnight becoming variable 10 knots or less. Mostly clear.
Waves 1 foot or less.

$$

LSZ144-145-182215-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
1006 AM CDT Mon Aug 18 2025

.REST OF TODAY...Northeast wind 5 to 10 knots. Chance of rain
showers late in the morning. Slight chance of thunderstorms in
the late morning and early afternoon. Slight chance of rain
showers early in the afternoon. Waves 1 to 2 feet.
.TONIGHT...Northeast wind 5 to 10 knots becoming west early in
the morning. Patchy fog through the night. Waves 1 to 2 feet.
.TUESDAY...Northwest wind 5 knots becoming northeast late in the
afternoon. Patchy fog in the morning. Waves 1 foot or less.
.TUESDAY NIGHT...Northeast wind 5 knots. Patchy fog after
midnight. Waves 1 foot or less.

$$

LSZ146-182215-
Port Wing to Sand Island WI-
1006 AM CDT Mon Aug 18 2025

.REST OF TODAY...East wind 5 to 10 knots. Chance of rain showers
late in the morning, then slight chance of rain showers in the
afternoon. Waves 1 to 2 feet.
.TONIGHT...Northeast wind 5 knots becoming northwest early in the
morning. Patchy fog through the night. Waves 1 to 2 feet.
.TUESDAY...Northwest wind 5 knots becoming northeast late in the
afternoon. Patchy fog in the morning. Waves 1 foot or less.
.TUESDAY NIGHT...East wind 5 knots early in the evening becoming
variable 10 knots or less. Patchy fog after midnight. Waves
1 foot or less.

$$

LSZ147-182215-
Sand Island to Bayfield WI-
1006 AM CDT Mon Aug 18 2025

.REST OF TODAY...East wind 5 to 10 knots. Chance of showers in
the late morning and early afternoon, then slight chance of
showers late. Waves 1 foot or less.
.TONIGHT...Northeast wind 5 knots becoming northwest early in the
morning. Slight chance of showers in the evening. Patchy fog
through the night. Waves 1 foot or less.
.TUESDAY...Northwest wind 5 knots becoming northeast late in the
afternoon. Patchy fog in the morning. Waves 1 foot or less.
.TUESDAY NIGHT...East wind 5 knots until early morning becoming
variable 10 knots or less. Mostly clear. Waves 1 foot or less.

$$

LSZ150-182215-
Outer Apostle Islands Beyond 5 NM from Mainland-
1006 AM CDT Mon Aug 18 2025

.REST OF TODAY...East wind 5 to 10 knots. Chance of showers in
the late morning and early afternoon, then slight chance of
showers late. Waves 1 to 2 feet.
.TONIGHT...East wind 5 knots becoming northwest after midnight.
Slight chance of showers in the evening. Patchy fog through the
night. Waves 1 foot or less.
.TUESDAY...Northwest wind 5 to 10 knots becoming northeast late
in the afternoon. Patchy fog in the morning. Waves 1 foot or
less.
.TUESDAY NIGHT...East wind 5 knots becoming north early in the
morning. Mostly clear. Waves 1 foot or less.

$$

LSZ121-182215-
Chequamegon Bay-Bayfield to Oak Point WI-
1006 AM CDT Mon Aug 18 2025

.REST OF TODAY...East wind 5 to 10 knots. Chance of showers in
the late morning and early afternoon. Slight chance of
thunderstorms in the afternoon. Slight chance of showers late.
Waves 1 foot or less.
.TONIGHT...Northeast wind 5 knots becoming northwest after
midnight. Slight chance of showers in the evening. Patchy fog
through the night. Waves 1 foot or less.
.TUESDAY...Northwest wind 5 knots becoming north in the
afternoon. Patchy fog in the morning. Waves 1 foot or less.
.TUESDAY NIGHT...East wind 5 knots until early morning becoming
variable 10 knots or less. Patchy fog after midnight. Waves
1 foot or less.

$$

LSZ148-182215-
Oak Point to Saxon Harbor WI-
1006 AM CDT Mon Aug 18 2025

.REST OF TODAY...East wind 5 to 10 knots. Gusts up to 20 knots
early in the afternoon. Chance of showers in the late morning and
early afternoon. Slight chance of thunderstorms in the afternoon.
Slight chance of showers late. Waves 1 to 2 feet.
.TONIGHT...East wind 5 knots becoming northwest after midnight.
Slight chance of showers in the evening. Patchy fog through the
night. Waves 1 foot or less.
.TUESDAY...Northwest wind 5 knots becoming north in the
afternoon. Patchy fog in the morning. Waves 1 foot or less.
.TUESDAY NIGHT...East wind 5 knots. Patchy fog after midnight.
Waves 1 foot or less.

$$

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

LE