875
FZUS53 KDLH 210246
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
946 PM 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.

LSZ140-141-211045-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
946 PM CDT Wed Aug 20 2025

.REST OF TONIGHT...West wind 5 knots. Patchy fog. Waves 1 foot or
less.
.THURSDAY...Southwest wind 5 knots becoming south in the late
morning and afternoon. Patchy dense fog in the morning. Waves
1 foot or less.
.THURSDAY NIGHT...Southeast wind 5 to 10 knots becoming west in
the late evening and overnight. Slight chance of showers and
thunderstorms in the evening, then chance of showers and
thunderstorms after midnight. Waves 1 foot or less.
.FRIDAY...Southwest wind 10 to 15 knots. Gusts up to 20 knots in
the late morning and afternoon. Chance of thunderstorms in the
morning. Chance of showers through the day. Slight chance of
thunderstorms in the afternoon. Waves 1 to 3 feet.

$$

LSZ142-143-211045-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
946 PM CDT Wed Aug 20 2025

.REST OF TONIGHT...Northeast wind 5 knots. Patchy fog in the late
evening and early morning, then areas of dense fog toward
daybreak. Waves 1 foot or less.
.THURSDAY...Variable winds 10 knots or less becoming southeast
5 knots in the late morning and afternoon. Patchy fog in the
morning. Waves 1 foot or less.
.THURSDAY NIGHT...East wind 5 knots becoming north late in the
evening, then becoming southwest after midnight. Slight chance of
showers in the evening, then chance of showers and thunderstorms
after midnight. Waves 1 foot or less.
.FRIDAY...Southwest wind 5 to 10 knots. Chance of thunderstorms
in the morning. Chance of showers through the day. Slight chance
of thunderstorms in the afternoon. Waves 1 foot or less.

$$

LSZ144-145-211045-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
946 PM CDT Wed Aug 20 2025

.REST OF TONIGHT...Northeast wind 5 to 10 knots. Patchy fog after
midnight. Areas of fog toward daybreak. Waves 1 foot or less.
.THURSDAY...East wind 5 to 10 knots. Areas of dense fog in the
morning. Waves 1 foot or less.
.THURSDAY NIGHT...East wind 5 to 10 knots becoming southwest
after midnight. Chance of showers and thunderstorms after
midnight. Waves 1 foot or less.
.FRIDAY...West wind 5 to 10 knots. Chance of thunderstorms in the
morning. Chance of showers through the day. Slight chance of
thunderstorms in the afternoon. Waves 1 foot or less.

$$

LSZ146-211045-
Port Wing to Sand Island WI-
946 PM CDT Wed Aug 20 2025

.REST OF TONIGHT...East wind 5 knots. Patchy fog after midnight.
Areas of fog toward daybreak. Waves 1 foot or less.
.THURSDAY...Southeast wind 5 knots becoming northeast in the
afternoon. Areas of dense fog in the morning. Waves 1 foot or
less.
.THURSDAY NIGHT...East wind 5 knots becoming southwest in the
late evening and overnight. Chance of showers and slight chance
of thunderstorms after midnight. Waves 1 foot or less.
.FRIDAY...Southwest wind 5 to 10 knots. Chance of showers and
slight chance of thunderstorms. Waves 1 foot or less.

$$

LSZ147-211045-
Sand Island to Bayfield WI-
946 PM CDT Wed Aug 20 2025

.REST OF TONIGHT...Southeast wind 5 knots. Patchy fog after
midnight. Waves 1 foot or less.
.THURSDAY...Southeast wind 5 knots becoming east in the
afternoon. Patchy fog in the morning. 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.
.FRIDAY...Southwest wind 5 to 10 knots. Chance of showers and
slight chance of thunderstorms. Waves 1 foot or less.

$$

LSZ150-211045-
Outer Apostle Islands Beyond 5 NM from Mainland-
946 PM CDT Wed Aug 20 2025

.REST OF TONIGHT...East wind 5 knots. Patchy fog in the late
evening and early morning. Areas of fog toward daybreak. Waves
1 foot or less.
.THURSDAY...Southeast wind 5 knots becoming east late in the
afternoon. Areas of fog in the morning. Waves 1 foot or less.
.THURSDAY NIGHT...Southeast wind 5 knots becoming southwest early
in the morning. Slight chance of showers and thunderstorms after
midnight. Waves 1 foot or less.
.FRIDAY...Southwest wind 5 to 10 knots. Chance of showers and
slight chance of thunderstorms. Waves 1 foot or less.

$$

LSZ121-211045-
Chequamegon Bay-Bayfield to Oak Point WI-
946 PM CDT Wed Aug 20 2025

.REST OF TONIGHT...Northeast wind 5 knots becoming southeast
after midnight, then becoming variable 10 knots or less toward
daybreak. Patchy fog after midnight. Areas of fog toward
daybreak. Waves 1 foot or less.
.THURSDAY...Variable winds 10 knots or less becoming south
5 knots late in the morning, then becoming southeast in the
afternoon. Areas of fog in the morning. 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.
.FRIDAY...Southwest wind 5 to 10 knots. Slight chance of
thunderstorms in the morning. Chance of showers through the day.
Chance of thunderstorms in the afternoon. Waves 1 foot or less.

$$

LSZ148-211045-
Oak Point to Saxon Harbor WI-
946 PM CDT Wed Aug 20 2025

.REST OF TONIGHT...East wind 5 knots becoming southeast after
midnight, then becoming variable 10 knots or less toward
daybreak. Patchy fog after midnight. Areas of fog toward
daybreak. Waves 1 foot or less.
.THURSDAY...South wind 5 knots becoming east in the afternoon.
Areas of fog in the morning. 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.
.FRIDAY...Southwest wind 5 to 10 knots. Slight chance of
thunderstorms in the morning. Chance of showers through the day.
Chance of thunderstorms in the afternoon. Waves 1 foot or less.

$$

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

Rothstein