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Nearshore Marine Forecast
National Weather Service Marquette MI
1101 AM EST Thu Nov 20 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.

LMZ221-202100-
Green Bay North of line from Cedar River MI to Rock Island
Passage-
1101 AM EST Thu Nov 20 2025

.REST OF TODAY...Southwest wind 15 to 20 knots. Cloudy with a
slight chance of rain showers. Waves 2 to 3 feet building to 2 to
4 feet.
.TONIGHT...West wind 10 to 20 knots becoming 10 to 15 knots by
midnight. Mostly cloudy with a slight chance of rain showers
through late evening, then partly cloudy by midnight. Waves
subsiding to 1 to 2 feet.
.FRIDAY...West wind 10 to 15 knots veering northwest in the
afternoon. Partly cloudy. Waves 1 to 2 feet.
.FRIDAY NIGHT...Northwest wind less than 10 knots. Mostly clear.
Waves calm to 1 foot.

$$

LMZ248-250-202100-
Seul Choix Point to Point Detour MI-
5NM East of a line from Fairport MI to Rock Island Passage-
1101 AM EST Thu Nov 20 2025

.REST OF TODAY...Southwest wind 15 to 20 knots. Cloudy with a
chance of rain showers. Waves 2 to 4 feet building to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...West wind 15 to 20 knots becoming 10 to 20 knots by
midnight. Mostly cloudy with a slight chance of rain showers
through midnight, then partly cloudy late. Waves subsiding to
1 to 2 feet.
.FRIDAY...West wind 10 to 15 knots veering northwest in the
afternoon. Partly cloudy. Waves 1 to 2 feet.
.FRIDAY NIGHT...Northwest wind less than 10 knots. Partly cloudy.
Waves 1 to 2 feet.

$$

LSZ240-241-202100-
Saxon Harbor WI to Black River MI-
Black River to Ontonagon MI-
1101 AM EST Thu Nov 20 2025 /1001 AM CST Thu Nov 20 2025/

.REST OF TODAY...Southwest wind 15 to 20 knots veering west late.
Cloudy. A slight chance of rain showers by late morning. Waves
2 to 3 feet building to 2 to 4 feet.
.TONIGHT...West wind 15 to 20 knots. Mostly cloudy through late
evening then becoming partly cloudy. Waves building to 3 to
5 feet occasionally to 7 feet.
.FRIDAY...Northwest wind 10 to 20 knots. Partly cloudy. Waves
subsiding to 1 to 2 feet.
.FRIDAY NIGHT...Northwest wind less than 10 knots in the evening
becoming variable. Partly cloudy. Waves 1 to 2 feet.

$$

LSZ242-243-202100-
Ontonagon to Upper Entrance of Portage Canal MI-
Upper Entrance of Portage Canal to Eagle River MI-
1101 AM EST Thu Nov 20 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...Southwest wind 15 to 20 knots veering west late.
Gusts up to 28 knots. Cloudy with a chance of rain showers. Waves
2 to 4 feet building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West wind 15 to 25 knots. Mostly cloudy through
midnight then becoming partly cloudy. Waves subsiding to 3 to
5 feet occasionally to 7 feet, then building to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY...Northwest wind 15 to 25 knots. Mostly cloudy. Waves
subsiding to 2 to 3 feet.
.FRIDAY NIGHT...Northwest wind less than 10 knots backing west
after midnight. Mostly cloudy in the evening then becoming partly
cloudy. Waves subsiding to 1 to 2 feet.

$$

LSZ244-245-202100-
Eagle River to Manitou Island MI-
Manitou Island to Point Isabelle MI-
1101 AM EST Thu Nov 20 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...Southwest wind 15 to 20 knots veering west late.
Gusts up to 27 knots. Cloudy with a chance of rain showers. Waves
2 to 4 feet building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West wind 15 to 25 knots. Mostly cloudy. A slight
chance of rain showers through midnight. Waves subsiding to 3 to
5 feet occasionally to 7 feet, then building to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY...Northwest wind 20 to 25 knots diminishing to 10 to
20 knots in the afternoon. Gusts up to 32 knots. Mostly cloudy.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Northwest wind 5 to 15 knots becoming less than
10 knots after midnight. Mostly cloudy. Waves subsiding to 1 to
2 feet.

$$

LSZ246-202100-
Point Isabelle to Lower Entrance of Portage Canal MI-
1101 AM EST Thu Nov 20 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...Southwest wind 10 to 15 knots veering west late.
Gusts up to 25 knots. Cloudy with a chance of rain showers. Waves
2 to 3 feet subsiding to 1 to 2 feet.
.TONIGHT...West wind 10 to 20 knots. Mostly cloudy. Waves 1 to
2 feet.
.FRIDAY...Northwest wind 10 to 20 knots with gusts up to
31 knots. Mostly cloudy. Waves 1 to 2 feet.
.FRIDAY NIGHT...Northwest wind less than 10 knots in the evening
becoming variable. Gusts up to 18 knots. Mostly cloudy. Waves
calm to 1 foot.

$$

LSZ247-202100-
Lower Entrance of Portage Canal To Huron Islands MI Including
Keweenaw and Huron Bays-
1101 AM EST Thu Nov 20 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...Southwest wind 15 to 20 knots veering west late.
Cloudy with a chance of rain showers. Waves 1 to 2 feet building
to 2 to 3 feet.
.TONIGHT...West wind 15 to 20 knots. Mostly cloudy. Waves
building to 2 to 4 feet.
.FRIDAY...Northwest wind 10 to 20 knots with gusts up to
30 knots. Mostly cloudy. Waves subsiding to 1 to 2 feet.
.FRIDAY NIGHT...Northwest wind less than 10 knots in the evening
becoming variable. Gusts up to 18 knots. Mostly cloudy in the
evening then becoming partly cloudy. Waves 1 to 2 feet.

$$

LSZ248-202100-
Huron Islands to Marquette MI-
1101 AM EST Thu Nov 20 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...Southwest wind 10 to 15 knots veering west 10 to
20 knots late. Cloudy. A chance of rain showers by late morning,
then a slight chance of rain showers late. Waves 1 to 2 feet
building to 2 to 3 feet.
.TONIGHT...West wind 15 to 20 knots. Mostly cloudy through
midnight then becoming partly cloudy. A slight chance of rain
showers through midnight. Waves building to 2 to 4 feet.
.FRIDAY...Northwest wind 10 to 20 knots with gusts up to
30 knots. Mostly cloudy. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 3 feet.
.FRIDAY NIGHT...Northwest wind 5 to 15 knots in the evening
becoming variable. Mostly cloudy. Waves subsiding to 1 to 2 feet.

$$

LSZ249-202100-
Marquette to Munising MI-
1101 AM EST Thu Nov 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM FRIDAY MORNING THROUGH
FRIDAY AFTERNOON...

.REST OF TODAY...Southwest wind 10 to 15 knots. Cloudy. A chance
of rain showers by late morning, then a slight chance of rain
showers late. Waves 1 to 2 feet building to 2 to 3 feet.
.TONIGHT...West wind 10 to 20 knots. Mostly cloudy. A slight
chance of rain showers through midnight. Waves building to 3 to
5 feet occasionally to 7 feet.
.FRIDAY...West wind 15 to 20 knots veering northwest in the
afternoon. Mostly cloudy with a slight chance of rain showers and
snow showers. Waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Northwest wind 10 to 20 knots diminishing to less
than 10 knots after midnight. Mostly cloudy. A slight chance of
snow showers in the evening. Waves subsiding to 1 to 2 feet.

$$

LSZ250-202100-
Munising to Grand Marais MI-
1101 AM EST Thu Nov 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EST THIS EVENING
THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...Southwest wind 15 to 20 knots. Cloudy with a
chance of rain showers. Waves 1 to 2 feet building to 2 to
3 feet.
.TONIGHT...West wind 15 to 20 knots. Cloudy. A chance of rain
showers through midnight, then a slight chance of rain showers
late. Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Northwest wind 20 to 25 knots. Mostly cloudy. A chance
of rain showers and snow showers in the morning, then a slight
chance of rain showers and snow showers in the afternoon. Waves
building to 5 to 8 feet occasionally to 10 feet.
.FRIDAY NIGHT...Northwest wind 10 to 20 knots. Cloudy. A slight
chance of snow showers in the evening. Waves subsiding to 2 to
3 feet.

$$

LSZ251-202100-
Grand Marais to Whitefish Point MI-
1101 AM EST Thu Nov 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EST THIS EVENING
THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...South wind 15 to 20 knots veering southwest
late. Cloudy with rain showers likely. Waves 2 to 3 feet.
.TONIGHT...West wind 15 to 20 knots. Cloudy with a chance of rain
showers. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Northwest wind 20 to 25 knots. Mostly cloudy. A chance
of rain showers in the morning, then a chance of rain showers and
snow showers in the afternoon. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.
.FRIDAY NIGHT...Northwest wind 10 to 20 knots. Cloudy. A slight
chance of snow showers in the evening. Waves subsiding to 2 to
3 feet.

$$

WFO MQT