Nearshore Marine Forecast
Issued by NWS Marquette, MI

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FZUS53 KMQT 231501
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Nearshore Marine Forecast
National Weather Service Marquette MI
1101 AM EDT Sat Aug 23 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.

LMZ221-232000-
Green Bay North of line from Cedar River MI to Rock Island
Passage-
1101 AM EDT Sat Aug 23 2025

.REST OF TODAY...Northwest wind 15 to 20 knots. Mostly sunny. A
chance of sprinkles late. Waves 2 to 4 feet subsiding to 2 to
3 feet.
.TONIGHT...West wind 10 to 15 knots. Mostly clear. Waves
subsiding to 1 to 2 feet.
.SUNDAY...Northwest wind 5 to 15 knots. Partly cloudy with a
chance of showers. A chance of waterspouts. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northwest wind 10 to 15 knots. Mostly cloudy in
the evening then becoming partly cloudy. A slight chance of
showers. A chance of waterspouts. Waves 1 to 2 feet.

$$

LMZ248-250-232000-
Seul Choix Point to Point Detour MI-
5NM East of a line from Fairport MI to Rock Island Passage-
1101 AM EDT Sat Aug 23 2025

.REST OF TODAY...Northwest wind 15 to 20 knots. Partly cloudy
with a chance of showers. Waves 2 to 4 feet subsiding to 2 to
3 feet.
.TONIGHT...Northwest wind 10 to 15 knots. Partly cloudy. Waves
subsiding to 1 to 2 feet.
.SUNDAY...Northwest wind 10 to 15 knots. Partly cloudy. A chance
of showers in the morning, then showers likely in the afternoon.
A chance of waterspouts through the day. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northwest wind 10 to 15 knots. Mostly cloudy with
a chance of showers in the evening, then partly cloudy with a
slight chance of showers after midnight. A chance of waterspouts
through the night. Waves 1 to 2 feet.

$$

LSZ240-232000-
Saxon Harbor WI to Black River MI-
1101 AM EDT Sat Aug 23 2025 /1001 AM CDT Sat Aug 23 2025/

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT /7 PM CDT/ THIS
EVENING...

.REST OF TODAY...West wind 15 to 25 knots. Partly cloudy. A
chance of sprinkles through the day. Waves 2 to 4 feet building
to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...Northwest wind 15 to 20 knots. Mostly cloudy with a
chance of showers. Waves subsiding to 2 to 4 feet.
.SUNDAY...Northwest wind 15 to 20 knots. Mostly cloudy with a
chance of showers. Waves 2 to 4 feet.
.SUNDAY NIGHT...Northwest wind 10 to 20 knots. Mostly cloudy in
the evening then becoming partly cloudy. Waves subsiding to 1 to
2 feet, then building to 2 to 3 feet.

$$

LSZ241-232000-
Black River to Ontonagon MI-
1101 AM EDT Sat Aug 23 2025 /1001 AM CDT Sat Aug 23 2025/

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...

.REST OF TODAY...West wind 15 to 25 knots. Partly cloudy. A
chance of sprinkles by late morning, then a chance of showers
late. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West wind 15 to 20 knots. Mostly cloudy. A slight
chance of showers through midnight, then a chance of showers
late. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northwest wind 15 to 20 knots. Cloudy with a chance of
showers. Waves 3 to 5 feet occasionally to 7 feet.
.SUNDAY NIGHT...Northwest wind 15 to 20 knots. Mostly cloudy in
the evening then becoming partly cloudy. Waves subsiding to 2 to
4 feet.

$$

LSZ242-243-232000-
Ontonagon to Upper Entrance of Portage Canal MI-
Upper Entrance of Portage Canal to Eagle River MI-
1101 AM EDT Sat Aug 23 2025

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

.REST OF TODAY...West wind 20 to 25 knots. Partly cloudy. A
chance of sprinkles through the day. Waves 3 to 6 feet
occasionally to 8 feet building to 4 to 7 feet occasionally to
9 feet.
.TONIGHT...West wind 15 to 20 knots with gusts up to 31 knots.
Partly cloudy through late evening then becoming mostly cloudy. A
chance of showers through late evening, then a chance of
sprinkles by midnight. A slight chance of showers late. Waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northwest wind 15 to 20 knots with gusts up to
28 knots. Cloudy with a chance of showers. Waves subsiding to
2 to 4 feet.
.SUNDAY NIGHT...Northwest wind 15 to 20 knots. Mostly cloudy.
Waves building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ245-232000-
Manitou Island to Point Isabelle MI-
1101 AM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...Northwest wind 20 to 25 knots. Mostly sunny.
Waves 2 to 4 feet building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.TONIGHT...West wind 10 to 15 knots with gusts up to 27 knots.
Mostly clear through midnight then becoming mostly cloudy. A
chance of sprinkles late. Waves subsiding to 1 to 2 feet, then
building to 2 to 3 feet.
.SUNDAY...Northwest wind 10 to 15 knots with gusts up to
27 knots. Mostly cloudy with a chance of showers. Waves building
to 2 to 4 feet.
.SUNDAY NIGHT...Northwest wind 10 to 15 knots with gusts up to
26 knots. Mostly cloudy. Waves 2 to 4 feet.

$$

LSZ244-232000-
Eagle River to Manitou Island MI-
1101 AM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...

.REST OF TODAY...West wind up to 30 knots. Mostly sunny. A chance
of sprinkles late. Waves 3 to 6 feet occasionally to 8 feet
building to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...West wind 15 to 20 knots with gusts up to 28 knots.
Partly cloudy through midnight then becoming mostly cloudy. A
chance of sprinkles through late evening. A chance of sprinkles
late. Waves subsiding to 2 to 4 feet.
.SUNDAY...Northwest wind 15 to 20 knots with gusts up to
28 knots. Mostly cloudy. A slight chance of showers in the
morning, then a chance of showers in the afternoon. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY NIGHT...Northwest wind 15 to 20 knots with gusts up to
27 knots. Mostly cloudy. Waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ246-232000-
Point Isabelle to Lower Entrance of Portage Canal MI-
1101 AM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...Northwest wind 15 to 25 knots. Partly cloudy. A
chance of sprinkles. Waves 1 to 2 feet building to 2 to 3 feet.
.TONIGHT...West wind 10 to 15 knots with gusts up to 30 knots.
Partly cloudy with a chance of sprinkles through midnight, then
mostly cloudy with a slight chance of showers late. Waves
subsiding to 1 to 2 feet.
.SUNDAY...Northwest wind 10 to 15 knots with gusts up to
27 knots. Mostly cloudy with a chance of showers. Waves calm to
1 foot.
.SUNDAY NIGHT...Northwest wind 10 to 15 knots with gusts up to
26 knots. Mostly cloudy. A slight chance of showers in the
evening. Waves calm to 1 foot.

$$

LSZ247-232000-
Lower Entrance of Portage Canal To Huron Islands MI Including
Keweenaw and Huron Bays-
1101 AM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...Northwest wind 15 to 25 knots. Partly cloudy. A
chance of showers by late morning, then a chance of sprinkles
late. Waves 2 to 4 feet.
.TONIGHT...West wind 10 to 20 knots with gusts up to 29 knots.
Mostly clear with a chance of sprinkles through late evening,
then mostly cloudy with a chance of showers by midnight. Waves
subsiding to 1 to 2 feet.
.SUNDAY...Northwest wind 10 to 15 knots with gusts up to
27 knots. Mostly cloudy with a chance of showers. Waves 1 to
2 feet.
.SUNDAY NIGHT...Northwest wind 10 to 15 knots with gusts up to
26 knots. Mostly cloudy. A slight chance of showers in the
evening. Waves 1 to 2 feet.

$$

LSZ248-232000-
Huron Islands to Marquette MI-
1101 AM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...Northwest wind 20 to 25 knots. Partly cloudy.
Waves 3 to 6 feet occasionally to 8 feet subsiding to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...West wind 10 to 20 knots with gusts up to 28 knots.
Mostly clear through midnight then becoming mostly cloudy. A
chance of showers through midnight, then a slight chance of
showers late. Waves subsiding to 1 to 2 feet.
.SUNDAY...Northwest wind 10 to 15 knots with gusts up to
26 knots. Mostly cloudy with a chance of showers. Waves 1 to
2 feet.
.SUNDAY NIGHT...Northwest wind 10 to 15 knots with gusts up to
26 knots. Mostly cloudy with a slight chance of showers. Waves
building to 2 to 3 feet.

$$

LSZ249-232000-
Marquette to Munising MI-
1101 AM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 PM EDT THIS EVENING...

.REST OF TODAY...Northwest wind 15 to 25 knots. Mostly sunny.
Waves 4 to 7 feet occasionally to 9 feet.
.TONIGHT...West wind 10 to 15 knots with gusts up to 24 knots.
Mostly clear through midnight then becoming mostly cloudy. A
chance of sprinkles by midnight. A chance of showers late. Waves
subsiding to 2 to 4 feet.
.SUNDAY...Northwest wind 10 to 20 knots. A chance of showers in
the morning, then showers likely in the afternoon. Waves
subsiding to 2 to 3 feet, then building to 2 to 4 feet.
.SUNDAY NIGHT...Northwest wind 15 to 20 knots. Cloudy with a
slight chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ250-232000-
Munising to Grand Marais MI-
1101 AM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...

.REST OF TODAY...Northwest wind 20 to 25 knots. Mostly sunny. A
chance of showers by late morning. Waves 4 to 7 feet occasionally
to 9 feet.
.TONIGHT...West wind 15 to 20 knots. Mostly clear through
midnight then becoming mostly cloudy. A chance of sprinkles
through late evening, then a slight chance of showers by
midnight. A chance of showers late. Waves subsiding to 2 to
4 feet.
.SUNDAY...Northwest wind 10 to 20 knots. Showers likely. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY NIGHT...Northwest wind 15 to 20 knots. Cloudy with a
slight chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ251-232000-
Grand Marais to Whitefish Point MI-
1101 AM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...

.REST OF TODAY...West wind 15 to 25 knots. Partly cloudy. A
slight chance of showers by late morning. Waves 3 to 5 feet
occasionally to 7 feet building to 4 to 7 feet occasionally to
9 feet.
.TONIGHT...West wind 10 to 15 knots. Partly cloudy with a chance
of sprinkles through midnight, then mostly cloudy with a chance
of showers late. Waves subsiding to 2 to 4 feet.
.SUNDAY...Northwest wind 10 to 20 knots. Mostly cloudy with a
chance of showers. Waves building to 3 to 5 feet occasionally to
7 feet.
.SUNDAY NIGHT...Northwest wind 15 to 20 knots. Cloudy with a
slight chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.

$$

WFO MQT