781
FZUS53 KDLH 132022
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
322 PM CDT Wed Aug 13 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.

LSZ140-141-140415-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
322 PM CDT Wed Aug 13 2025

.TONIGHT...East wind 5 to 10 knots. Mostly cloudy early in the
evening then becoming partly cloudy. Waves 1 foot or less.
.THURSDAY...East wind 5 to 10 knots. Gusts up to 20 knots in the
afternoon. Slight chance of rain showers in the afternoon. Waves
1 to 2 feet.
.THURSDAY NIGHT...East wind 5 to 10 knots with gusts to around
20 knots becoming south 10 to 15 knots with gusts to around
20 knots early in the morning. Slight chance of rain showers in
the evening, then chance of showers and thunderstorms after
midnight. Waves 1 to 3 feet.
.FRIDAY...Southwest wind 10 to 15 knots with gusts to around
25 knots. Chance of showers and thunderstorms in the morning,
then slight chance of showers and thunderstorms in the afternoon.
Waves 2 to 4 feet.

$$

LSZ142-143-140415-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
322 PM CDT Wed Aug 13 2025

.TONIGHT...East wind 5 to 10 knots. Mostly clear. Waves 1 foot or
less.
.THURSDAY...East wind 10 to 15 knots. Gusts up to 20 knots late
in the afternoon. Slight chance of rain showers through the day.
Waves 1 to 2 feet.
.THURSDAY NIGHT...East wind 10 to 15 knots with gusts to around
20 knots becoming southeast 5 knots after midnight, then becoming
south early in the morning. Slight chance of showers and
thunderstorms in the evening, then chance of showers and
thunderstorms after midnight. Waves 1 to 2 feet.
.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 to 2 feet.

$$

LSZ144-145-140415-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
322 PM CDT Wed Aug 13 2025

.TONIGHT...East wind 5 to 10 knots. Mostly clear. Waves 1 foot or
less.
.THURSDAY...East wind 10 to 15 knots. Gusts up to 20 knots late
in the afternoon. Slight chance of rain showers in the morning,
then chance of rain showers and slight chance of thunderstorms in
the afternoon. Waves 1 to 2 feet.
.THURSDAY NIGHT...East wind 10 to 15 knots with gusts to around
20 knots becoming south 5 to 10 knots after midnight. Slight
chance of thunderstorms in the evening. Slight chance of showers
through the night. Chance of thunderstorms after midnight. Waves
1 to 2 feet.
.FRIDAY...Southwest wind 5 to 10 knots. Chance of showers and
thunderstorms in the morning. Slight chance of showers and
thunderstorms in the afternoon. Waves 1 to 2 feet.

$$

LSZ146-140415-
Port Wing to Sand Island WI-
322 PM CDT Wed Aug 13 2025

.TONIGHT...East wind 5 to 10 knots. Mostly clear. Waves 1 foot or
less.
.THURSDAY...East wind 5 to 10 knots. Slight chance of rain
showers in the afternoon. Waves 1 to 2 feet.
.THURSDAY NIGHT...East wind 5 to 10 knots becoming south after
midnight. Slight chance of showers and thunderstorms in the
evening, then chance of showers and thunderstorms after midnight.
Waves 1 to 2 feet.
.FRIDAY...Southwest wind 5 to 10 knots. Chance of showers and
thunderstorms in the morning, then slight chance of showers and
thunderstorms in the afternoon. Waves 1 foot or less.

$$

LSZ147-140415-
Sand Island to Bayfield WI-
322 PM CDT Wed Aug 13 2025

.TONIGHT...East wind 5 to 10 knots. Mostly clear. Waves 1 foot or
less.
.THURSDAY...East wind 5 to 10 knots. Slight chance of rain
showers in the afternoon. Waves 1 foot or less.
.THURSDAY NIGHT...Southeast wind 5 to 10 knots becoming south
after midnight. 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 5 to 10 knots. Chance of showers and
thunderstorms in the morning, then slight chance of showers and
thunderstorms in the afternoon. Waves 1 foot or less.

$$

LSZ150-140415-
Outer Apostle Islands Beyond 5 NM from Mainland-
322 PM CDT Wed Aug 13 2025

.TONIGHT...East wind 5 to 10 knots. Mostly clear. Waves 1 to
2 feet.
.THURSDAY...East wind 10 to 15 knots. Gusts up to 20 knots late
in the afternoon. Mostly sunny. Waves 1 to 2 feet.
.THURSDAY NIGHT...Southeast wind 5 to 10 knots with gusts to
around 20 knots becoming south with gusts to around 20 knots
after midnight. Slight chance of showers and thunderstorms in the
evening, then chance of showers and thunderstorms after midnight.
Waves 1 to 2 feet.
.FRIDAY...Southwest wind 5 to 10 knots. Gusts up to 20 knots
early in the morning. Chance of showers and thunderstorms in the
morning, then slight chance of showers and thunderstorms in the
afternoon. Waves 1 to 2 feet.

$$

LSZ121-140415-
Chequamegon Bay-Bayfield to Oak Point WI-
322 PM CDT Wed Aug 13 2025

.TONIGHT...East wind 5 to 10 knots becoming southeast late in the
night. Mostly clear. Waves 1 foot or less.
.THURSDAY...East wind 5 to 10 knots. Mostly sunny. Waves 1 foot
or less.
.THURSDAY NIGHT...Southeast wind 5 to 10 knots becoming south
after midnight. 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 5 to 10 knots. Gusts up to 20 knots in
the morning. Chance of showers and thunderstorms in the morning,
then slight chance of showers and thunderstorms in the afternoon.
Waves 1 foot or less.

$$

LSZ148-140415-
Oak Point to Saxon Harbor WI-
322 PM CDT Wed Aug 13 2025

.TONIGHT...East wind 5 to 10 knots becoming southeast late in the
night. Mostly clear. Waves 1 foot or less.
.THURSDAY...Southeast wind 5 knots becoming east in the
afternoon. Mostly sunny. Waves 1 foot or less.
.THURSDAY NIGHT...Southeast wind 5 to 10 knots becoming south
with gusts to around 20 knots after midnight. Slight chance of
showers and thunderstorms through the night. Waves 1 foot or
less.
.FRIDAY...Southwest wind 5 to 10 knots. Gusts up to 20 knots in
the morning. Slight chance of showers and thunderstorms. Waves
1 foot or less.

$$

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

NLy