Nearshore Marine Forecast
Issued by NWS Duluth, MN

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FZUS53 KDLH 162000
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
300 PM CDT Fri May 16 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.

LSZ140-141-170400-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
300 PM CDT Fri May 16 2025

.TONIGHT...Northwest wind 5 to 10 knots becoming northeast late
in the evening, then becoming northwest after midnight. Slight
chance of rain showers early in the evening, then chance of rain
showers late in the evening. Slight chance of rain showers after
midnight. Waves 1 to 2 feet.
.SATURDAY...Northwest wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots in the afternoon. Slight chance of rain
showers. Waves 1 to 2 feet.
.SATURDAY NIGHT...North wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots in the late evening and overnight. Chance
of rain showers. Waves 1 to 2 feet.
.SUNDAY...Northeast wind 10 to 15 knots with gusts to around
20 knots becoming east 5 to 10 knots late in the afternoon.
Mostly cloudy. Waves 1 to 2 feet.

$$

LSZ142-143-170400-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-
300 PM CDT Fri May 16 2025

.TONIGHT...South wind 5 knots becoming east late in the evening,
then becoming northwest after midnight. Chance of rain showers.
Waves 1 foot or less.
.SATURDAY...Northwest wind 5 to 10 knots with gusts to around
20 knots. Slight chance of rain showers. Waves 1 foot or less.
.SATURDAY NIGHT...North wind 5 to 10 knots with gusts to around
20 knots easing to 5 knots early in the morning. Chance of rain
showers. Waves 1 foot or less.
.SUNDAY...Northeast wind 5 to 10 knots becoming east in the
afternoon. Mostly cloudy. Waves 1 to 2 feet.

$$

LSZ144-170400-
Two Harbors to Duluth MN-
300 PM CDT Fri May 16 2025

.TONIGHT...South wind 5 to 10 knots becoming northwest in the
late evening and early morning, then becoming west late in the
night. Chance of rain showers. Waves 1 foot or less.
.SATURDAY...Northwest wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots late in the morning, then decreasing to
20 knots in the afternoon. Slight chance of rain showers in the
afternoon. Waves 1 to 2 feet.
.SATURDAY NIGHT...North wind 10 to 15 knots. Chance of rain
showers. Waves 1 foot or less.
.SUNDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots
late in the afternoon. Cloudy in the morning then becoming partly
sunny. Waves 1 to 2 feet.

$$

LSZ145-170400-
Duluth MN to Port Wing WI-
300 PM CDT Fri May 16 2025

.TONIGHT...Southwest wind 5 to 10 knots becoming northwest in the
late evening and early morning, then becoming west late in the
night. Chance of rain showers. Waves 1 foot or less.
.SATURDAY...Northwest wind 10 to 15 knots with gusts to around
20 knots. Slight chance of rain showers. Waves 1 to 2 feet.
.SATURDAY NIGHT...Northwest wind 10 to 15 knots becoming north
5 to 10 knots early in the morning. Chance of rain showers. Waves
1 to 2 feet.
.SUNDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots
late in the afternoon. Cloudy in the morning then becoming partly
sunny. Waves 1 to 2 feet.

$$

LSZ146-170400-
Port Wing to Sand Island WI-
300 PM CDT Fri May 16 2025

.TONIGHT...Southeast wind 5 knots becoming east late in the
evening, then becoming northwest after midnight becoming west
late in the night. Chance of rain showers until early morning,
then slight chance of rain showers late in the night. Waves
1 foot or less.
.SATURDAY...West wind 5 to 10 knots. Slight chance of rain
showers through the day. Areas of smoke in the afternoon. Waves
1 to 2 feet.
.SATURDAY NIGHT...Northwest wind 5 to 10 knots becoming north
after midnight. Areas of smoke in the evening. Chance of rain
showers through the night. Waves 1 foot or less.
.SUNDAY...Northeast wind 5 to 10 knots. Mostly cloudy. Waves 1 to
2 feet.

$$

LSZ147-170400-
Sand Island to Bayfield WI-
300 PM CDT Fri May 16 2025

.TONIGHT...East wind 5 knots becoming northwest after midnight.
Chance of rain showers until early morning, then slight chance of
rain showers late in the night. Waves 1 foot or less.
.SATURDAY...West wind 5 to 10 knots. Gusts up to 20 knots in the
late morning and early afternoon. Slight chance of rain showers
in the morning, then chance of rain showers in the afternoon.
Waves 1 to 2 feet.
.SATURDAY NIGHT...Northwest wind 5 to 10 knots becoming north
after midnight. Chance of rain showers. Waves 1 to 2 feet.
.SUNDAY...Northeast wind 5 to 10 knots. Mostly cloudy. Waves 1 to
2 feet.

$$

LSZ150-170400-
Outer Apostle Islands Beyond 5 NM from Mainland-
300 PM CDT Fri May 16 2025

.TONIGHT...Northeast wind 5 to 10 knots becoming east late in the
evening, then becoming northwest after midnight. Chance of rain
showers until early morning, then slight chance of rain showers
late in the night. Waves 1 foot or less.
.SATURDAY...Northwest wind 5 to 10 knots with gusts to around
20 knots. Slight chance of rain showers in the morning, then
chance of rain showers in the afternoon. Waves 1 to 2 feet
building to 1 to 3 feet in the late morning and afternoon.
.SATURDAY NIGHT...Northwest wind 5 to 10 knots becoming northeast
after midnight. Chance of rain showers. Waves 1 to 2 feet.
.SUNDAY...Northeast wind 10 to 15 knots becoming east late in the
afternoon. Mostly cloudy. Waves 1 to 3 feet.

$$

LSZ121-170400-
Chequamegon Bay-Bayfield to Oak Point WI-
300 PM CDT Fri May 16 2025

.TONIGHT...South wind 5 to 10 knots with gusts to around 20 knots
becoming northwest after midnight. Chance of rain showers. Waves
1 foot or less.
.SATURDAY...Northwest wind 5 to 10 knots. Gusts up to 20 knots in
the late morning and early afternoon. Slight chance of rain
showers in the morning, then chance of rain showers in the
afternoon. Waves 1 foot or less.
.SATURDAY NIGHT...Northwest wind 5 to 10 knots becoming north
after midnight. Chance of rain showers. Waves 1 foot or less.
.SUNDAY...Northeast wind 10 to 15 knots easing to 10 knots late
in the afternoon. Gusts up to 20 knots in the late morning and
early afternoon. Mostly cloudy. Waves 1 foot or less.

$$

LSZ148-170400-
Oak Point to Saxon Harbor WI-
300 PM CDT Fri May 16 2025

.TONIGHT...Southeast wind 5 to 10 knots becoming northwest after
midnight. Chance of rain showers. Waves 1 foot or less.
.SATURDAY...Northwest wind 5 to 10 knots. Gusts up to 20 knots in
the late morning and early afternoon. Chance of rain showers
through the day. Waves 1 to 2 feet.
.SATURDAY NIGHT...Northwest wind 5 to 10 knots becoming northeast
after midnight. Chance of rain showers. Waves 1 to 3 feet.
.SUNDAY...Northeast wind 10 to 15 knots with gusts to around
20 knots. Mostly cloudy. Waves 1 to 3 feet.

$$

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

BJH