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FZUS53 KDLH 200806
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
306 AM CDT Wed Aug 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.

LSZ140-141-201615-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
306 AM CDT Wed Aug 20 2025

.TODAY...North wind 5 knots becoming south in the late morning
and early afternoon, then becoming southwest late in the
afternoon. Patchy dense fog until late afternoon. Waves 1 foot or
less.
.TONIGHT...Southwest wind 5 knots becoming west in the late
evening and overnight. Patchy dense fog in the evening. Waves
1 foot or less.
.THURSDAY...West wind 5 knots becoming south in the late morning
and afternoon. Patchy dense fog. Waves 1 foot or less.
.THURSDAY NIGHT...South wind 5 to 10 knots becoming southwest
after midnight. Chance of showers and thunderstorms after
midnight. Waves 1 to 2 feet.

$$

LSZ142-143-201615-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
306 AM CDT Wed Aug 20 2025

.TODAY...Northeast wind 5 knots becoming southeast in the
afternoon. Patchy dense fog early in the morning. Patchy dense
fog in the afternoon. Waves 1 foot or less.
.TONIGHT...East wind 5 knots becoming northeast in the late
evening and overnight. Patchy dense fog. Waves 1 foot or less.
.THURSDAY...North wind 5 knots becoming southeast in the late
morning and afternoon. Patchy dense fog. Waves 1 foot or less.
.THURSDAY NIGHT...Southeast wind 5 knots becoming southwest after
midnight. Chance of showers and thunderstorms after midnight.
Waves 1 foot or less.

$$

LSZ144-145-201615-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
306 AM CDT Wed Aug 20 2025

.TODAY...Northeast wind 5 knots. Patchy dense fog through the
day. Waves 1 foot or less.
.TONIGHT...Northeast wind 5 knots becoming east early in the
morning. Patchy dense fog. Waves 1 foot or less.
.THURSDAY...Southeast wind 5 knots. Patchy dense fog. Waves
1 foot or less.
.THURSDAY NIGHT...Southeast wind 5 knots becoming southwest early
in the morning. Chance of showers and thunderstorms after
midnight. Waves 1 foot or less.

$$

LSZ146-201615-
Port Wing to Sand Island WI-
306 AM CDT Wed Aug 20 2025

.TODAY...Northeast wind 5 knots. Areas of dense fog early in the
morning, then patchy dense fog in the late morning and early
afternoon. Waves 1 foot or less.
.TONIGHT...East wind 5 knots becoming southeast early in the
morning. Patchy dense fog after midnight. Waves 1 foot or less.
.THURSDAY...South wind 5 knots early in the morning becoming
variable 10 knots or less, then becoming east 5 knots in the
afternoon. Patchy dense fog. Waves 1 foot or less.
.THURSDAY NIGHT...Southeast wind 5 knots becoming southwest in
the late evening and overnight. Chance of showers and
thunderstorms after midnight. Waves 1 foot or less.

$$

LSZ147-201615-
Sand Island to Bayfield WI-
306 AM CDT Wed Aug 20 2025

.TODAY...Northeast wind 5 knots becoming east late in the
afternoon. Patchy dense fog early in the morning. Waves 1 foot or
less.
.TONIGHT...Southeast wind 5 knots. Patchy dense fog after
midnight. Waves 1 foot or less.
.THURSDAY...South wind 5 knots becoming east in the afternoon.
Patchy dense fog. Waves 1 foot or less.
.THURSDAY NIGHT...Southeast wind 5 knots becoming southwest in
the late evening and overnight. Chance of showers and
thunderstorms after midnight. Waves 1 foot or less.

$$

LSZ150-201615-
Outer Apostle Islands Beyond 5 NM from Mainland-
306 AM CDT Wed Aug 20 2025

.TODAY...Northeast wind 5 knots becoming southeast late in the
afternoon. Patchy dense fog until late afternoon. Waves 1 foot or
less.
.TONIGHT...East wind 5 knots. Patchy dense fog after midnight.
Waves 1 foot or less.
.THURSDAY...South wind 5 knots becoming southeast in the
afternoon. Patchy dense fog. Waves 1 foot or less.
.THURSDAY NIGHT...Southeast wind 5 knots becoming southwest early
in the morning. Chance of showers and slight chance of
thunderstorms after midnight. Waves 1 foot or less.

$$

LSZ121-201615-
Chequamegon Bay-Bayfield to Oak Point WI-
306 AM CDT Wed Aug 20 2025

.TODAY...Northeast wind 5 knots. Patchy dense fog early in the
morning. Waves 1 foot or less.
.TONIGHT...East wind 5 knots becoming south early in the morning.
Patchy dense fog after midnight. Waves 1 foot or less.
.THURSDAY...South wind 5 knots becoming southeast in the
afternoon. Patchy dense fog. Waves 1 foot or less.
.THURSDAY NIGHT...Southeast wind 5 knots becoming southwest in
the late evening and overnight. Slight chance of showers and
thunderstorms after midnight. Waves 1 foot or less.

$$

LSZ148-201615-
Oak Point to Saxon Harbor WI-
306 AM CDT Wed Aug 20 2025

.TODAY...Northeast wind 5 knots. Patchy dense fog early in the
morning. Waves 1 foot or less.
.TONIGHT...East wind 5 knots becoming south early in the morning.
Patchy dense fog after midnight. Waves 1 foot or less.
.THURSDAY...South wind 5 knots becoming southeast in the
afternoon. Patchy dense fog. Waves 1 foot or less.
.THURSDAY NIGHT...Southeast wind 5 knots becoming southwest in
the late evening and overnight. Slight chance of showers and
thunderstorms after midnight. Waves 1 foot or less.

$$

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

Wolfe