538
FZUS53 KDLH 170814
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
314 AM CDT Wed Sep 17 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.

LSZ140-141-171615-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
314 AM CDT Wed Sep 17 2025

.TODAY...West wind 5 knots. Areas of dense fog early in the
morning. Waves 1 foot or less.
.TONIGHT...North wind 5 knots becoming northeast with gusts to
around 20 knots in the late evening and overnight. Mostly cloudy.
Waves 1 to 2 feet.
.THURSDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots
early in the morning. Partly sunny. Waves 1 to 2 feet.
.THURSDAY NIGHT...Northeast wind 5 to 10 knots. Partly cloudy in
the evening then becoming mostly cloudy. Waves 1 to 2 feet.

$$

LSZ142-171615-
Taconite Harbor to Silver Bay Harbor MN-
314 AM CDT Wed Sep 17 2025

.TODAY...West wind 5 knots becoming southwest early in the
afternoon, then becoming variable 10 knots or less late in the
afternoon. Areas of dense fog early in the morning. Patchy fog
late in the morning, then areas of dense fog early in the
afternoon. Waves 1 foot or less.
.TONIGHT...Northeast wind 5 to 10 knots. Partly cloudy in the
evening then becoming mostly cloudy. Waves 1 foot or less.
.THURSDAY...East wind 10 to 15 knots with gusts to around
20 knots. Slight chance of rain showers in the morning. Waves
1 to 3 feet.
.THURSDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to
20 knots early in the evening then 20 knots early in the morning.
Mostly cloudy. Waves 1 to 2 feet.

$$

LSZ143-171615-
Silver Bay Harbor to Two Harbors MN-
314 AM CDT Wed Sep 17 2025

.TODAY...West wind 5 knots in the morning becoming variable
10 knots or less. Areas of dense fog until late afternoon. Waves
1 foot or less.
.TONIGHT...Northeast wind 10 to 15 knots with gusts to around
20 knots. Partly cloudy in the evening then becoming mostly
cloudy. Waves 1 to 2 feet.
.THURSDAY...Northeast wind 15 to 20 knots. Gusts up to 20 knots
increasing to 25 knots in the late morning and afternoon. Slight
chance of rain showers through the day. Waves 1 to 2 feet
building to 1 to 3 feet in the late morning and afternoon.
.THURSDAY NIGHT...Northeast wind 10 to 15 knots with gusts to
around 20 knots. Mostly cloudy. Waves 1 to 3 feet.

$$

LSZ144-145-171615-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
314 AM CDT Wed Sep 17 2025

.TODAY...West wind 5 knots becoming east in the afternoon. Areas
of dense fog in the morning. Waves 1 foot or less.
.TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots
early in the morning. Partly cloudy in the evening then becoming
mostly cloudy. Waves 1 to 2 feet.
.THURSDAY...Northeast wind 15 to 20 knots. Gusts up to 20 knots
increasing to 25 knots in the late morning and afternoon. Slight
chance of rain showers. Waves 1 to 2 feet building to 2 to 4 feet
in the late morning and afternoon. A small craft advisory may be
needed.
.THURSDAY NIGHT...Northeast wind 15 to 20 knots. Gusts up to
25 knots decreasing to 20 knots in the late evening and
overnight. Slight chance of rain showers after midnight. Waves
2 to 4 feet subsiding to 1 to 3 feet after midnight.

$$

LSZ146-171615-
Port Wing to Sand Island WI-
314 AM CDT Wed Sep 17 2025

.TODAY...West wind 5 knots in the morning becoming variable
10 knots or less. Areas of dense fog until late afternoon. Waves
1 foot or less.
.TONIGHT...Northeast wind 10 to 15 knots with gusts to around
20 knots. Partly cloudy in the evening then becoming mostly
cloudy. Waves 1 to 2 feet.
.THURSDAY...Northeast wind 15 to 20 knots. Slight chance of rain
showers. Waves 1 to 3 feet.
.THURSDAY NIGHT...East wind 10 to 15 knots. Gusts up to 20 knots
in the evening. Mostly cloudy. Waves 1 to 3 feet.

$$

LSZ147-171615-
Sand Island to Bayfield WI-
314 AM CDT Wed Sep 17 2025

.TODAY...West wind 5 knots becoming east late in the afternoon.
Areas of dense fog until late afternoon. Waves 1 foot or less.
.TONIGHT...East wind 10 to 15 knots with gusts to around
20 knots. Partly cloudy in the evening then becoming mostly
cloudy. Waves 1 to 2 feet.
.THURSDAY...Northeast wind 10 to 15 knots with gusts to around
20 knots. Mostly cloudy. Waves 1 to 3 feet.
.THURSDAY NIGHT...East wind 10 to 15 knots with gusts to around
20 knots easing to 5 to 10 knots with gusts to around 20 knots in
the late evening and overnight. Mostly cloudy. Waves 1 to 2 feet.

$$

LSZ121-171615-
Chequamegon Bay-Bayfield to Oak Point WI-
314 AM CDT Wed Sep 17 2025

.TODAY...West wind 5 knots becoming northeast in the afternoon.
Patchy fog early in the morning. Waves 1 foot or less.
.TONIGHT...Northeast wind 5 to 10 knots. Gusts up to 20 knots
early in the morning. Partly cloudy in the evening then becoming
mostly cloudy. Waves 1 to 2 feet.
.THURSDAY...Northeast wind 10 to 15 knots with gusts to around
20 knots. Slight chance of rain showers. Waves 1 to 2 feet.
.THURSDAY NIGHT...Northeast wind 10 to 15 knots with gusts to
around 20 knots easing to 5 to 10 knots with gusts to around
20 knots in the late evening and overnight. Mostly cloudy. Waves
1 to 2 feet.

$$

LSZ148-171615-
Oak Point to Saxon Harbor WI-
314 AM CDT Wed Sep 17 2025

.TODAY...Southwest wind 5 knots becoming west late in the
morning, then becoming northeast early in the afternoon becoming
east late in the afternoon. Patchy dense fog in the morning.
Areas of dense fog early in the afternoon, then patchy dense fog
late in the afternoon. Waves 1 foot or less.
.TONIGHT...Northeast wind 10 to 15 knots with gusts to around
25 knots. Patchy dense fog in the evening. Waves 1 to 2 feet.
.THURSDAY...Northeast wind 15 to 20 knots. Partly sunny. Waves
1 to 3 feet building to 2 to 4 feet in the afternoon.
.THURSDAY NIGHT...Northeast wind 15 to 20 knots becoming east
5 to 10 knots with gusts to around 20 knots in the late evening
and overnight. Mostly cloudy. Waves 2 to 4 feet subsiding to 1 to
3 feet after midnight.

$$

LSZ150-171615-
Outer Apostle Islands Beyond 5 NM from Mainland-
314 AM CDT Wed Sep 17 2025

.TODAY...West wind 5 knots becoming southeast late in the
afternoon. Areas of dense fog until late afternoon. Patchy dense
fog late in the afternoon. Waves 1 foot or less.
.TONIGHT...Northeast wind 10 to 15 knots with gusts to around
25 knots. Areas of dense fog in the evening. Waves 1 to 3 feet.
.THURSDAY...Northeast wind 15 to 20 knots. Gusts up to 25 knots
late in the afternoon. Partly sunny. Waves 2 to 4 feet.
.THURSDAY NIGHT...East wind 15 to 20 knots easing to 5 to
10 knots after midnight. Mostly cloudy. Waves 1 to 3 feet
subsiding to 1 to 2 feet after midnight.

$$

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

Levens