Nearshore Marine Forecast
Issued by NWS Marquette, MI

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FZUS53 KMQT 171501
NSHMQT

Nearshore Marine Forecast
National Weather Service Marquette MI
1101 AM EDT Sun Aug 17 2025

For waters within five nautical miles of shore

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.

LMZ221-172000-
Green Bay North of line from Cedar River MI to Rock Island
Passage-
1101 AM EDT Sun Aug 17 2025

.REST OF TODAY...Northeast wind 10 to 15 knots veering east late.
Sunny. Waves 2 to 3 feet subsiding to 1 to 2 feet.
.TONIGHT...Northeast wind 10 to 15 knots veering southeast 15 to
20 knots late. Clear through midnight then becoming partly
cloudy. A slight chance of showers late. Waves building to 2 to
4 feet.
.MONDAY...Southeast wind 10 to 15 knots. Mostly cloudy. A slight
chance of showers in the morning, then a chance of showers and
thunderstorms in the afternoon. Waves subsiding to 1 to 2 feet.
.MONDAY NIGHT...Southeast wind 10 to 15 knots. Cloudy. Showers
likely and a chance of thunderstorms in the evening, then a
chance of showers and a slight chance of thunderstorms after
midnight. Waves 1 to 2 feet.

$$

LMZ248-250-172000-
Seul Choix Point to Point Detour MI-
5NM East of a line from Fairport MI to Rock Island Passage-
1101 AM EDT Sun Aug 17 2025

.REST OF TODAY...Northeast wind 10 to 15 knots veering east late.
Sunny. Waves 2 to 4 feet subsiding to 2 to 3 feet.
.TONIGHT...Northeast wind 10 to 20 knots veering southeast 15 to
20 knots late. Mostly clear. Waves building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY...Southeast wind 10 to 15 knots. Mostly cloudy. A slight
chance of showers in the morning, then a chance of showers and a
slight chance of thunderstorms in the afternoon. Waves subsiding
to 1 to 2 feet.
.MONDAY NIGHT...Southeast wind 10 to 15 knots. Showers likely and
a chance of thunderstorms. Waves building to 2 to 3 feet, then
subsiding to 1 to 2 feet.

$$

LSZ240-241-172000-
Saxon Harbor WI to Black River MI-
Black River to Ontonagon MI-
1101 AM EDT Sun Aug 17 2025 /1001 AM CDT Sun Aug 17 2025/

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.REST OF TODAY...Northeast wind 15 to 25 knots. Mostly sunny.
Waves 3 to 5 feet occasionally to 7 feet building to 4 to 7 feet
occasionally to 9 feet.
.TONIGHT...East wind 15 to 20 knots veering southeast 10 to
15 knots by midnight. Partly cloudy through midnight then
becoming cloudy. A chance of showers in the evening. A slight
chance of thunderstorms through the night. Showers likely after
midnight. Waves subsiding to 1 to 2 feet.
.MONDAY...Southeast wind 10 to 15 knots. Showers and a chance of
thunderstorms. Waves 1 to 2 feet.
.MONDAY NIGHT...East wind less than 10 knots backing northeast
10 to 15 knots after midnight. Cloudy. A chance of showers and a
slight chance of thunderstorms in the evening, then a slight
chance of showers after midnight. Waves building to 1 to 2 feet.

$$

LSZ242-243-172000-
Ontonagon to Upper Entrance of Portage Canal MI-
Upper Entrance of Portage Canal to Eagle River MI-
1101 AM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...

.REST OF TODAY...Northeast wind 10 to 15 knots veering east late.
Gusts up to 22 knots. Mostly sunny. Waves 3 to 5 feet
occasionally to 7 feet subsiding to 2 to 4 feet.
.TONIGHT...Southeast wind 10 to 15 knots. Mostly clear through
midnight then becoming mostly cloudy. A slight chance of showers
by midnight. Showers likely late. Waves subsiding to 1 to 2 feet.
.MONDAY...Southeast wind 10 to 15 knots with gusts up to
26 knots. Showers likely and a chance of thunderstorms. Waves
calm to 1 foot.
.MONDAY NIGHT...Southeast wind 10 to 15 knots backing east after
midnight. Gusts up to 22 knots. Cloudy. A chance of showers and a
slight chance of thunderstorms in the evening, then a slight
chance of showers after midnight. Waves 1 to 2 feet.

$$

LSZ245-172000-
Manitou Island to Point Isabelle MI-
1101 AM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON...

.REST OF TODAY...East wind 10 to 15 knots. Sunny. Waves 3 to
5 feet occasionally to 7 feet subsiding to 1 to 2 feet.
.TONIGHT...East wind 10 to 15 knots veering southeast 15 to
20 knots late. Clear through midnight, then partly cloudy with a
chance of showers late. Waves building to 2 to 4 feet.
.MONDAY...Southeast wind 15 to 20 knots with gusts up to
28 knots. Showers likely and a slight chance of thunderstorms in
the morning, then showers likely and a chance of thunderstorms in
the afternoon. Waves 2 to 4 feet.
.MONDAY NIGHT...East wind 5 to 15 knots with gusts up to
25 knots. Cloudy. A chance of showers and a slight chance of
thunderstorms in the evening, then a chance of showers after
midnight. Waves subsiding to 2 to 3 feet.

$$

LSZ244-172000-
Eagle River to Manitou Island MI-
1101 AM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...

.REST OF TODAY...East wind 10 to 15 knots. Sunny. Waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 3 feet.
.TONIGHT...Southeast wind 10 to 15 knots becoming 10 to 20 knots
late. Mostly clear through midnight then becoming mostly cloudy.
A chance of showers late. Waves subsiding to 1 to 2 feet, then
building to 2 to 4 feet.
.MONDAY...Southeast wind 15 to 20 knots with gusts up to
31 knots. Showers likely and a slight chance of thunderstorms in
the morning, then showers likely and a chance of thunderstorms in
the afternoon. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.
.MONDAY NIGHT...Southeast wind 10 to 15 knots backing east after
midnight. Gusts up to 24 knots. Cloudy. A chance of showers and a
slight chance of thunderstorms in the evening, then a chance of
showers after midnight. Waves 2 to 4 feet.

$$

LSZ246-172000-
Point Isabelle to Lower Entrance of Portage Canal MI-
1101 AM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.REST OF TODAY...East wind 10 to 15 knots. Mostly sunny. Waves
2 to 4 feet.
.TONIGHT...Southeast wind 10 to 15 knots. Mostly clear through
midnight then becoming mostly cloudy. A chance of showers late.
Waves subsiding to 2 to 3 feet, then building to 2 to 4 feet.
.MONDAY...Southeast wind 10 to 15 knots with gusts up to
27 knots. Showers likely and a chance of thunderstorms. Waves
subsiding to 2 to 3 feet, then building to 2 to 4 feet.
.MONDAY NIGHT...Southeast wind 10 to 15 knots backing east less
than 10 knots after midnight. Gusts up to 25 knots. Cloudy. A
chance of showers and a slight chance of thunderstorms in the
evening, then a chance of showers after midnight. Waves 2 to
3 feet.

$$

LSZ247-172000-
Lower Entrance of Portage Canal To Huron Islands MI Including
Keweenaw and Huron Bays-
1101 AM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.REST OF TODAY...East wind 10 to 20 knots. Mostly sunny. Waves
3 to 5 feet occasionally to 7 feet subsiding to 2 to 4 feet.
.TONIGHT...East wind 10 to 15 knots veering southeast late.
Mostly clear through midnight then becoming mostly cloudy. A
slight chance of showers by midnight. A chance of showers late.
Waves subsiding to 2 to 3 feet.
.MONDAY...Southeast wind 10 to 15 knots with gusts up to
25 knots. Showers likely and a chance of thunderstorms. Waves
subsiding to 1 to 2 feet.
.MONDAY NIGHT...Southeast wind less than 10 knots backing east
after midnight. Gusts up to 22 knots. Cloudy. A chance of showers
and a slight chance of thunderstorms in the evening, then a
chance of showers after midnight. Waves 1 to 2 feet.

$$

LSZ248-172000-
Huron Islands to Marquette MI-
1101 AM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.REST OF TODAY...Northeast wind 10 to 15 knots veering east late.
Mostly sunny. Waves 3 to 6 feet occasionally to 8 feet subsiding
to 2 to 3 feet.
.TONIGHT...East wind 10 to 15 knots veering southeast by
midnight. Clear through midnight then becoming partly cloudy. A
chance of showers late. Waves 2 to 3 feet.
.MONDAY...Southeast wind 10 to 15 knots with gusts up to
25 knots. Cloudy. A chance of showers and a slight chance of
thunderstorms in the morning, then showers likely and a chance of
thunderstorms in the afternoon. Waves subsiding to 1 to 2 feet.
.MONDAY NIGHT...Southeast wind less than 10 knots with gusts up
to 22 knots. Cloudy. A chance of showers and thunderstorms in the
evening, then a chance of showers and a slight chance of
thunderstorms after midnight. Waves 1 to 2 feet.

$$

LSZ249-172000-
Marquette to Munising MI-
1101 AM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.REST OF TODAY...Northeast wind 10 to 15 knots. Sunny. Waves 3 to
6 feet occasionally to 8 feet subsiding to 2 to 3 feet.
.TONIGHT...East wind 10 to 15 knots veering southeast by
midnight. Mostly clear. A slight chance of showers late. Waves
subsiding to 1 to 2 feet.
.MONDAY...Southeast wind 10 to 15 knots. Mostly cloudy. A chance
of showers and a slight chance of thunderstorms in the morning,
then a chance of showers and thunderstorms in the afternoon.
Waves 1 to 2 feet.
.MONDAY NIGHT...Southeast wind 5 to 15 knots. Cloudy. Showers
likely and a chance of thunderstorms in the evening, then a
chance of showers and a slight chance of thunderstorms after
midnight. Waves 1 to 2 feet.

$$

LSZ250-172000-
Munising to Grand Marais MI-
1101 AM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON...

.REST OF TODAY...Northeast wind 10 to 15 knots. Sunny. Waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 3 feet.
.TONIGHT...East wind 10 to 15 knots veering southeast by
midnight. Clear. A slight chance of showers late. Waves subsiding
to 1 to 2 feet.
.MONDAY...Southeast wind 10 to 15 knots. Mostly cloudy. A slight
chance of showers in the morning, then a chance of showers and a
slight chance of thunderstorms in the afternoon. Waves 1 to
2 feet.
.MONDAY NIGHT...Southeast wind 10 to 15 knots. Cloudy. Showers
likely and a chance of thunderstorms in the evening, then a
chance of showers and a slight chance of thunderstorms after
midnight. Waves 1 to 2 feet.

$$

LSZ251-172000-
Grand Marais to Whitefish Point MI-
1101 AM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON...

.REST OF TODAY...Northeast wind 10 to 15 knots. Sunny. Waves 2 to
4 feet subsiding to 1 to 2 feet.
.TONIGHT...Northeast wind 10 to 15 knots veering southeast 10 to
20 knots by midnight. Clear. Waves building to 2 to 3 feet.
.MONDAY...Southeast wind 10 to 20 knots. Partly cloudy in the
morning, then cloudy with a chance of showers and a slight chance
of thunderstorms in the afternoon. Waves subsiding to 1 to
2 feet, then building to 2 to 3 feet.
.MONDAY NIGHT...Southeast wind 10 to 20 knots. Cloudy. Showers
likely and a chance of thunderstorms in the evening, then a
chance of showers and thunderstorms after midnight. Waves
subsiding to 1 to 2 feet.

$$

WFO MQT