527
FZUS53 KDLH 182328
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
527 PM CST Tue Nov 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.

LSZ140-190500-
Grand Portage to Grand Marais MN-
527 PM CST Tue Nov 18 2025

.TONIGHT...West wind 5 to 10 knots. Partly cloudy. Waves 1 foot
or less.
.WEDNESDAY...Southwest wind 10 to 15 knots. Gusts up to 20 knots
in the afternoon. Chance of rain in the afternoon. Waves 1 to
3 feet.
.WEDNESDAY NIGHT...Southwest wind 10 to 15 knots with gusts to
around 25 knots. Chance of rain in the evening, then rain likely
after midnight. Waves 2 to 4 feet.
.THURSDAY...West wind 10 to 15 knots. Gusts up to 20 knots.
Chance of rain in the morning. Waves 2 to 4 feet subsiding to
1 to 2 feet late in the afternoon.

$$

LSZ141-190500-
Grand Marais to Taconite Harbor MN-
527 PM CST Tue Nov 18 2025

.TONIGHT...West wind 5 knots. Partly cloudy. Waves 1 foot or
less.
.WEDNESDAY...Southwest wind 5 to 10 knots. Chance of rain in the
afternoon. Waves 1 to 2 feet.
.WEDNESDAY NIGHT...Southwest wind 5 to 10 knots with gusts to
around 20 knots. Chance of rain in the evening, then rain likely
after midnight. Waves 1 to 2 feet.
.THURSDAY...West wind 5 to 10 knots with gusts to around
20 knots. Chance of rain in the morning. Waves 1 to 2 feet.

$$

LSZ142-190500-
Taconite Harbor to Silver Bay Harbor MN-
527 PM CST Tue Nov 18 2025

.TONIGHT...Southwest wind 5 knots. Partly cloudy. Waves 1 foot or
less.
.WEDNESDAY...Southwest wind 5 to 10 knots. Chance of rain in the
afternoon. Waves 1 foot or less.
.WEDNESDAY NIGHT...Southwest wind 5 to 10 knots. Gusts up to
20 knots in the late evening and early morning. Chance of rain in
the evening, then rain likely after midnight. Waves 1 foot or
less.
.THURSDAY...West wind 5 to 10 knots. Gusts up to 20 knots in the
late morning and afternoon. Chance of rain in the morning. Waves
1 foot or less.

$$

LSZ143-190500-
Silver Bay Harbor to Two Harbors MN-
527 PM CST Tue Nov 18 2025

.TONIGHT...South wind 5 knots becoming southwest in the late
evening and overnight. Partly cloudy. Waves 1 foot or less.
.WEDNESDAY...Southwest wind 5 to 10 knots. Slight chance of rain
in the afternoon. Waves 1 foot or less.
.WEDNESDAY NIGHT...Southwest wind 5 to 10 knots. Gusts up to
20 knots in the late evening and early morning. Chance of rain in
the evening, then rain likely after midnight. Waves 1 to 2 feet.
.THURSDAY...West wind 5 to 10 knots. Gusts up to 20 knots in the
afternoon. Chance of rain in the morning. Waves 1 foot or less.

$$

LSZ144-190500-
Two Harbors to Duluth MN-
527 PM CST Tue Nov 18 2025

.TONIGHT...Southeast wind 5 knots becoming southwest late in the
night. Partly cloudy. Waves 1 foot or less.
.WEDNESDAY...Southwest wind 5 to 10 knots. Mostly cloudy. Waves
1 foot or less.
.WEDNESDAY NIGHT...Southwest wind 5 to 10 knots. Chance of rain.
Waves 1 foot or less.
.THURSDAY...West wind 10 to 15 knots. Gusts up to 20 knots in the
afternoon. Slight chance of rain in the morning. Waves 1 to
2 feet.

$$

LSZ145-190500-
Duluth MN to Port Wing WI-
527 PM CST Tue Nov 18 2025

.TONIGHT...Southeast wind 5 knots becoming southwest late in the
night. Partly cloudy. Waves 1 foot or less.
.WEDNESDAY...Southwest wind 5 to 10 knots. Mostly cloudy. Waves
1 foot or less.
.WEDNESDAY NIGHT...Southwest wind 5 to 10 knots. Gusts up to
20 knots after midnight. Chance of rain. Waves 1 foot or less.
.THURSDAY...West wind 5 to 10 knots rising to 10 to 15 knots with
gusts to around 20 knots in the afternoon. Chance of rain in the
morning. Waves 1 to 2 feet.

$$

LSZ146-190500-
Port Wing to Sand Island WI-
527 PM CST Tue Nov 18 2025

.TONIGHT...Southeast wind 5 knots becoming southwest in the late
evening and overnight. Partly cloudy. Waves 1 foot or less.
.WEDNESDAY...Southwest wind 5 to 10 knots. Mostly cloudy. Waves
1 foot or less.
.WEDNESDAY NIGHT...Southwest wind 5 to 10 knots. Gusts up to
20 knots in the late evening and overnight. Chance of rain in the
evening, then rain likely after midnight. Waves 1 foot or less.
.THURSDAY...West wind 10 to 15 knots easing to 10 knots late in
the afternoon. Gusts up to 20 knots in the late morning and
afternoon. Chance of rain in the morning. Waves 1 to 2 feet.

$$

LSZ147-190500-
Sand Island to Bayfield WI-
527 PM CST Tue Nov 18 2025

.TONIGHT...South wind 5 knots becoming southwest after midnight.
Mostly clear. Waves 1 foot or less.
.WEDNESDAY...Southwest wind 5 to 10 knots. Mostly cloudy. Waves
1 foot or less.
.WEDNESDAY NIGHT...Southwest wind 5 to 10 knots with gusts to
around 20 knots. Chance of rain in the evening, then rain likely
after midnight. Waves 1 foot or less.
.THURSDAY...West wind 5 to 10 knots with gusts to around
20 knots. Chance of rain in the morning. Waves 1 to 2 feet.

$$

LSZ150-190500-
Outer Apostle Islands Beyond 5 NM from Mainland-
527 PM CST Tue Nov 18 2025

.TONIGHT...Southeast wind 5 knots becoming southwest in the late
evening and overnight. Mostly clear. Waves 1 foot or less.
.WEDNESDAY...Southwest wind 10 to 15 knots. Mostly cloudy. Waves
1 foot or less.
.WEDNESDAY NIGHT...Southwest wind 10 to 15 knots with gusts to
around 20 knots. Chance of rain in the evening, then rain likely
after midnight. Waves 1 to 2 feet.
.THURSDAY...West wind 10 to 15 knots. Gusts up to 20 knots.
Chance of rain in the morning. Waves 1 to 3 feet.

$$

LSZ121-190500-
Chequamegon Bay-Bayfield to Oak Point WI-
527 PM CST Tue Nov 18 2025

.TONIGHT...South wind 5 knots becoming southwest in the late
evening and overnight. Partly cloudy. Waves 1 foot or less.
.WEDNESDAY...Southwest wind 5 to 10 knots. Mostly cloudy. Waves
1 foot or less.
.WEDNESDAY NIGHT...Southwest wind 5 to 10 knots. Chance of rain
in the evening, then rain likely after midnight. Waves 1 foot or
less.
.THURSDAY...Southwest wind 5 to 10 knots with gusts to around
20 knots becoming west with gusts to around 20 knots in the
afternoon. Chance of rain in the morning. Waves 1 foot or less.

$$

LSZ148-190500-
Oak Point to Saxon Harbor WI-
527 PM CST Tue Nov 18 2025

.TONIGHT...South wind 5 knots becoming southwest after midnight.
Mostly clear. Waves 1 foot or less.
.WEDNESDAY...Southwest wind 5 to 10 knots. Partly sunny. Waves
1 foot or less.
.WEDNESDAY NIGHT...Southwest wind 5 to 10 knots. Gusts up to
20 knots in the late evening and overnight. Chance of rain in the
evening, then rain likely after midnight. Waves 1 foot or less.
.THURSDAY...Southwest wind 5 to 10 knots becoming west with gusts
to around 20 knots in the afternoon. Chance of rain in the
morning. Waves 1 to 2 feet.

$$

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

WFO DLH