745
FZUS53 KMQT 180902
NSHMQT

Nearshore Marine Forecast
National Weather Service Marquette MI
502 AM EDT Mon Aug 18 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.

LMZ221-182000-
Green Bay North of line from Cedar River MI to Rock Island
Passage-
502 AM EDT Mon Aug 18 2025

.EARLY THIS MORNING...Southeast wind 15 to 20 knots. Mostly
cloudy. Waves 2 to 4 feet.
.TODAY...Southeast wind 10 to 20 knots. Cloudy. A slight chance
of showers through mid morning, then a chance of showers and a
slight chance of thunderstorms by late morning. Waves subsiding
to 1 to 2 feet.
.TONIGHT...Southeast wind 10 to 15 knots becoming 5 to 15 knots
by midnight. Showers likely and a chance of thunderstorms through
late evening, then a chance of showers and thunderstorms by
midnight. Waves 1 to 2 feet.
.TUESDAY...Northwest wind less than 10 knots veering north 10 to
15 knots in the afternoon. Mostly cloudy with a slight chance of
showers. Waves 1 to 2 feet.
.TUESDAY NIGHT...North wind 10 to 15 knots. Partly cloudy. Waves
1 to 2 feet.

$$

LMZ248-250-182000-
Seul Choix Point to Point Detour MI-
5NM East of a line from Fairport MI to Rock Island Passage-
502 AM EDT Mon Aug 18 2025

.EARLY THIS MORNING...Southeast wind 15 to 20 knots. Partly
cloudy. Waves 2 to 4 feet.
.TODAY...Southeast wind 10 to 20 knots becoming 10 to 15 knots
late. Mostly cloudy. A slight chance of showers by late morning.
A chance of showers and a slight chance of thunderstorms late.
Waves subsiding to 1 to 2 feet, then building to 2 to 3 feet.
.TONIGHT...Southeast wind 10 to 15 knots. Showers likely and a
chance of thunderstorms. Waves subsiding to 1 to 2 feet, then
building to 2 to 3 feet.
.TUESDAY...Southwest wind 10 to 15 knots veering northwest in the
afternoon. Mostly cloudy. A chance of showers in the morning,
then a slight chance of showers in the afternoon. Waves 1 to
2 feet.
.TUESDAY NIGHT...North wind 10 to 15 knots. Mostly cloudy in the
evening then becoming partly cloudy. Waves 1 to 2 feet.

$$

LSZ240-241-182000-
Saxon Harbor WI to Black River MI-
Black River to Ontonagon MI-
502 AM EDT Mon Aug 18 2025 /402 AM CDT Mon Aug 18 2025/

.EARLY THIS MORNING...Southeast wind 10 to 15 knots. Cloudy with
a chance of showers and a slight chance of thunderstorms. Waves
1 to 2 feet.
.TODAY...Southeast wind 5 to 15 knots. Cloudy. Showers likely and
a chance of thunderstorms through early afternoon, then a chance
of showers and thunderstorms late. Waves 1 to 2 feet.
.TONIGHT...South wind less than 10 knots veering northwest late.
Cloudy. A chance of showers and a slight chance of thunderstorms
through late evening, then a slight chance of showers by
midnight. Waves calm to 1 foot.
.TUESDAY...Northwest wind 10 to 15 knots veering north less than
10 knots in the afternoon. Mostly cloudy. Waves building to 1 to
2 feet.
.TUESDAY NIGHT...Variable wind less than 10 knots. Mostly clear.
Waves 1 to 2 feet.

$$

LSZ243-182000-
Upper Entrance of Portage Canal to Eagle River MI-
502 AM EDT Mon Aug 18 2025

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

.EARLY THIS MORNING...Southeast wind 10 to 15 knots. Mostly
cloudy with a slight chance of showers. Waves calm to 1 foot
building to 1 to 2 feet.
.TODAY...Southeast wind 10 to 15 knots with gusts up to 23 knots.
Showers likely and a slight chance of thunderstorms through mid
morning, then showers likely and a chance of thunderstorms by
late morning. Waves 1 to 2 feet.
.TONIGHT...Southeast wind 10 to 15 knots veering southwest 5 to
15 knots late. Cloudy. A slight chance of thunderstorms through
late evening. A chance of showers through midnight, then a slight
chance of showers late. Waves calm to 1 foot.
.TUESDAY...North wind 10 to 15 knots. Mostly cloudy. Waves
building to 2 to 3 feet, then subsiding to 1 to 2 feet.
.TUESDAY NIGHT...North wind less than 10 knots. Mostly clear.
Waves 1 to 2 feet.

$$

LSZ242-182000-
Ontonagon to Upper Entrance of Portage Canal MI-
502 AM EDT Mon Aug 18 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM EDT THIS MORNING
THROUGH THIS EVENING...

.EARLY THIS MORNING...Southeast wind 10 to 15 knots. Mostly
cloudy with a chance of showers. Waves calm to 1 foot.
.TODAY...Southeast wind 5 to 15 knots. Showers likely and a
chance of thunderstorms. Waves calm to 1 foot.
.TONIGHT...Southeast wind less than 10 knots veering west 5 to
15 knots late. Cloudy. A slight chance of thunderstorms through
late evening. A chance of showers through midnight, then a slight
chance of showers late. Waves calm to 1 foot.
.TUESDAY...Northwest wind 10 to 15 knots veering north 5 to
15 knots in the afternoon. Mostly cloudy. Waves building to 1 to
2 feet.
.TUESDAY NIGHT...North wind less than 10 knots. Mostly clear.
Waves 1 to 2 feet.

$$

LSZ244-245-182000-
Eagle River to Manitou Island MI-
Manitou Island to Point Isabelle MI-
502 AM EDT Mon Aug 18 2025

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

.EARLY THIS MORNING...Southeast wind 10 to 15 knots with gusts up
to 22 knots. Partly cloudy. Waves 2 to 3 feet building to 2 to
4 feet.
.TODAY...Southeast wind 15 to 20 knots. A chance of showers
through mid morning, then showers likely and a chance of
thunderstorms by late morning. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.TONIGHT...South wind 10 to 20 knots. Cloudy. A chance of showers
and a slight chance of thunderstorms through midnight, then a
slight chance of showers late. Waves subsiding to 2 to 3 feet.
.TUESDAY...North wind 10 to 15 knots with gusts up to 22 knots.
Mostly cloudy. Waves subsiding to 1 to 2 feet, then building to
2 to 3 feet.
.TUESDAY NIGHT...North wind less than 10 knots. Mostly clear.
Waves 1 to 2 feet.

$$

LSZ246-182000-
Point Isabelle to Lower Entrance of Portage Canal MI-
502 AM EDT Mon Aug 18 2025

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

.EARLY THIS MORNING...Southeast wind 10 to 15 knots. Mostly
cloudy with a slight chance of showers. Waves 2 to 3 feet.
.TODAY...Southeast wind 10 to 15 knots with gusts up to 23 knots.
A chance of showers and a slight chance of thunderstorms through
mid morning, then showers likely and a chance of thunderstorms by
late morning. Waves building to 2 to 4 feet.
.TONIGHT...Southeast wind 5 to 15 knots veering south less than
10 knots late. Cloudy. A chance of thunderstorms in the evening.
A chance of showers through the night. A slight chance of
thunderstorms after midnight. Waves subsiding to 1 to 2 feet.
.TUESDAY...Northwest wind less than 10 knots veering north in the
afternoon. Gusts up to 21 knots. Mostly cloudy. Waves 1 to
2 feet.
.TUESDAY NIGHT...North wind less than 10 knots. Partly cloudy.
Waves calm to 1 foot.

$$

LSZ247-182000-
Lower Entrance of Portage Canal To Huron Islands MI Including
Keweenaw and Huron Bays-
502 AM EDT Mon Aug 18 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM EDT THIS MORNING
THROUGH THIS EVENING...

.EARLY THIS MORNING...Southeast wind 5 to 15 knots. Mostly cloudy
with a slight chance of showers. Waves 1 to 2 feet.
.TODAY...Southeast wind 5 to 15 knots. Showers likely and a
chance of thunderstorms. Waves building to 2 to 3 feet, then
subsiding to 1 to 2 feet.
.TONIGHT...Southeast wind less than 10 knots veering south late.
Cloudy. A chance of thunderstorms in the evening. A chance of
showers through the night. A slight chance of thunderstorms after
midnight. Waves 1 to 2 feet.
.TUESDAY...Northwest wind less than 10 knots veering north in the
afternoon. Gusts up to 22 knots. Mostly cloudy. Waves calm to
1 foot.
.TUESDAY NIGHT...North wind less than 10 knots. Partly cloudy.
Waves calm to 1 foot.

$$

LSZ248-182000-
Huron Islands to Marquette MI-
502 AM EDT Mon Aug 18 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM EDT THIS MORNING
THROUGH THIS EVENING...

.EARLY THIS MORNING...Southeast wind 10 to 15 knots. Partly
cloudy. Waves 1 to 2 feet.
.TODAY...Southeast wind 10 to 15 knots with gusts up to 22 knots.
Cloudy. A chance of showers through early afternoon. A chance of
thunderstorms by late morning. Showers likely late. Waves
building to 2 to 3 feet, then subsiding to 1 to 2 feet.
.TONIGHT...Southeast wind 5 to 15 knots veering south less than
10 knots late. Cloudy. A chance of thunderstorms through late
evening. A chance of showers through the night. A slight chance
of thunderstorms by midnight. Waves 1 to 2 feet.
.TUESDAY...Northwest wind 5 to 15 knots veering north 10 to
15 knots in the afternoon. Gusts up to 22 knots. Mostly cloudy.
Waves building to 1 to 2 feet.
.TUESDAY NIGHT...North wind less than 10 knots with gusts up to
17 knots. Mostly cloudy in the evening then becoming partly
cloudy. Waves 1 to 2 feet.

$$

LSZ249-182000-
Marquette to Munising MI-
502 AM EDT Mon Aug 18 2025

.EARLY THIS MORNING...Southeast wind 10 to 15 knots. Partly
cloudy. Waves 1 to 2 feet.
.TODAY...Southeast wind 10 to 15 knots. Mostly cloudy. A slight
chance of showers through mid morning, then a chance of showers
and a slight chance of thunderstorms by late morning. Waves 1 to
2 feet.
.TONIGHT...Southeast wind 5 to 15 knots. Cloudy. A chance of
showers and thunderstorms through midnight, then a chance of
showers and a slight chance of thunderstorms late. Waves calm to
1 foot.
.TUESDAY...Northwest wind 5 to 15 knots becoming 10 to 15 knots
in the afternoon. Gusts up to 22 knots. Mostly cloudy. A slight
chance of showers in the morning. Waves building to 2 to 3 feet.
.TUESDAY NIGHT...North wind 5 to 15 knots. Mostly cloudy in the
evening then becoming partly cloudy. Waves subsiding to 1 to
2 feet.

$$

LSZ250-182000-
Munising to Grand Marais MI-
502 AM EDT Mon Aug 18 2025

.EARLY THIS MORNING...Southeast wind 10 to 15 knots. Mostly
clear. Waves 1 to 2 feet.
.TODAY...Southeast wind 10 to 15 knots. Mostly cloudy. A chance
of showers by late morning. A chance of showers and a slight
chance of thunderstorms late. Waves 1 to 2 feet.
.TONIGHT...Southeast wind 5 to 15 knots. Cloudy. A chance of
showers and thunderstorms through midnight, then a chance of
showers and a slight chance of thunderstorms late. Waves building
to 1 to 2 feet.
.TUESDAY...West wind 10 to 15 knots veering northwest in the
afternoon. Mostly cloudy. A slight chance of showers in the
morning. Waves building to 2 to 3 feet.
.TUESDAY NIGHT...North wind 10 to 15 knots. Mostly cloudy in the
evening then becoming partly cloudy. Waves subsiding to 1 to
2 feet.

$$

LSZ251-182000-
Grand Marais to Whitefish Point MI-
502 AM EDT Mon Aug 18 2025

.EARLY THIS MORNING...Southeast wind 15 to 20 knots. Mostly
clear. Waves 2 to 3 feet.
.TODAY...Southeast wind 10 to 20 knots. Partly cloudy through
early afternoon then becoming cloudy. A slight chance of showers
by late morning. A chance of showers and a slight chance of
thunderstorms late. Waves subsiding to 1 to 2 feet, then building
to 2 to 3 feet.
.TONIGHT...Southeast wind 10 to 20 knots. Cloudy with a chance of
showers and thunderstorms. Waves subsiding to 1 to 2 feet.
.TUESDAY...South wind 10 to 15 knots veering northwest in the
afternoon. Cloudy. A chance of showers in the morning, then a
slight chance of showers in the afternoon. Waves building to 2 to
3 feet.
.TUESDAY NIGHT...North wind 10 to 15 knots. Mostly cloudy. Waves
subsiding to 1 to 2 feet.

$$

WFO MQT