939
FZUS53 KDTX 040728
NSHDTX

Nearshore Marine Forecast for Michigan
National Weather Service Detroit/Pontiac MI
328 AM EDT Thu Sep 4 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.

LHZ422-041530-
Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
328 AM EDT Thu Sep 4 2025

...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...

.TODAY...West winds 10 to 15 knots increasing to 15 to 20 knots
late in the afternoon. Mostly sunny. Waves 1 to 3 feet.
.TONIGHT...Southwest winds 15 to 20 knots becoming south 20 to
25 knots after midnight. Partly cloudy. A chance of showers after
midnight. Waves 1 to 3 feet building to 3 to 5 feet after
midnight. Waves occasionally around 7 feet.
.FRIDAY...Southwest winds to 30 knots veering to the west early in
the afternoon. Gusts to 35 knot gales. Mostly cloudy early in the
morning becoming partly cloudy. Waves 5 to 7 feet. Waves occasionally
around 10 feet. A Gale Warning may be needed.
.FRIDAY NIGHT...West winds 20 to 25 knots with gusts to 30 knots
becoming southwest 15 to 20 knots in the late evening and
overnight. Mostly clear. Waves 3 to 5 feet subsiding to 2 to
4 feet after midnight. Waves occasionally around 7 feet.

See Lake Huron Open Lake Forecast for days 3 through 5.

$$

LHZ421-041530-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-
328 AM EDT Thu Sep 4 2025

...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...

.TODAY...West winds 10 to 15 knots increasing to 15 to 20 knots
late in the afternoon. Partly cloudy in the morning then
clearing. Waves 1 to 3 feet.
.TONIGHT...Southwest winds 15 to 20 knots becoming south 20 to
25 knots after midnight. Partly cloudy. A chance of showers after
midnight. Waves 3 to 5 feet. Waves occasionally around 7 feet.
.FRIDAY...South winds to 30 knots veering to the west early in the
afternoon. Gusts to 40 knot gales. Mostly cloudy early in the morning
becoming partly cloudy. A chance of showers early in the morning.
Waves 6 to 9 feet. Waves occasionally around 12 feet. A Gale Warning
may be needed.
.FRIDAY NIGHT...West winds 20 to 25 knots with gusts to 30 knots
diminishing to 15 to 20 knots in the late evening and overnight.
Partly cloudy. Waves 6 to 9 feet subsiding to 4 to 6 feet in the
late evening and overnight. Waves occasionally around 12 feet.

See Lake Huron Open Lake Forecast for days 3 through 5.

$$

LHZ441-041530-
Port Austin to Harbor Beach MI-
328 AM EDT Thu Sep 4 2025

...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...

.TODAY...West winds 10 to 15 knots. Partly cloudy in the morning
then clearing. Waves 2 to 4 feet subsiding to 1 to 3 feet in the
afternoon.
.TONIGHT...Southwest winds 10 to 15 knots becoming south 15 to
20 knots after midnight. Partly cloudy. A slight chance of. Waves
2 to 4 feet.
.FRIDAY...South winds to 30 knots with gusts to 35 knot gales veering
to the west with gusts to 40 knot gales early in the afternoon.
Mostly cloudy early in the morning becoming partly cloudy. A chance
of showers until late afternoon. Waves 6 to 9 feet. Waves
occasionally around 12 feet. A Gale Warning may be needed.
.FRIDAY NIGHT...West winds 20 to 25 knots with gusts to 30 knots
diminishing to 15 to 20 knots in the late evening and overnight.
Partly cloudy. Waves 6 to 9 feet subsiding to 4 to 6 feet in the
late evening and overnight. Waves occasionally around 12 feet.

See Lake Huron Open Lake Forecast for days 3 through 5.

$$

LHZ442-041530-
Harbor Beach to Port Sanilac MI-
328 AM EDT Thu Sep 4 2025

...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...

.TODAY...Northwest winds 15 to 20 knots becoming west 5 to
10 knots. Mostly cloudy in the morning then clearing. Waves 1 to
3 feet.
.TONIGHT...Southwest winds 10 to 15 knots increasing to 15 to
20 knots after midnight. Mostly clear. Waves 2 feet or less.
.FRIDAY...South winds 20 to 25 knots becoming southwest to 30 knots
in the late morning and afternoon. Gusts to 35 knot gales. Partly
cloudy. Waves 5 to 7 feet. Waves occasionally around 10 feet. A Gale
Warning may be needed.
.FRIDAY NIGHT...West winds 20 to 25 knots with gusts to 30 knots
diminishing to 10 to 15 knots in the late evening and overnight.
Partly cloudy. Waves 3 to 5 feet subsiding to 1 to 3 feet in the
late evening and overnight. Waves occasionally around 7 feet.

See Lake Huron Open Lake Forecast for days 3 through 5.

$$

LHZ443-041530-
Port Sanilac to Port Huron MI-
328 AM EDT Thu Sep 4 2025

...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...

.TODAY...Northwest winds 15 to 20 knots becoming west 5 to
10 knots. Partly cloudy in the morning then clearing. Waves
2 feet or less.
.TONIGHT...West winds 5 to 10 knots becoming south 10 to 15 knots
after midnight. Mostly clear. Waves 2 feet or less.
.FRIDAY...South winds 20 to 25 knots with gusts to 30 knots veering
to the west with gusts to 35 knot gales early in the afternoon.
Partly cloudy early in the morning becoming mostly sunny. Waves 5 to
7 feet. Waves occasionally around 10 feet. A Gale Warning may be
needed.
.FRIDAY NIGHT...West winds 20 to 25 knots becoming southwest
10 to 15 knots. Partly cloudy. Waves 3 to 5 feet subsiding to
1 to 3 feet in the late evening and overnight. Waves occasionally
around 7 feet.

See Lake Huron Open Lake Forecast for days 3 through 5.

$$

LEZ444-041530-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
328 AM EDT Thu Sep 4 2025

.TODAY...Northwest winds 10 to 15 knots becoming west 5 to
10 knots in the afternoon. Partly cloudy. Waves 2 feet or less.
.TONIGHT...West winds 5 to 10 knots becoming south 10 to 15 knots
after midnight. Mostly clear. Waves 1 to 3 feet.
.FRIDAY...South winds 15 to 20 knots becoming southwest 20 to 25
knots in the late morning and afternoon. Mostly sunny until late
afternoon becoming partly cloudy. Waves 3 to 5 feet. Waves
occasionally around 7 feet. A Small Craft Advisory may be needed.
.FRIDAY NIGHT...West winds 15 to 20 knots diminishing to 5 to
10 knots. Partly cloudy. Waves 2 to 4 feet subsiding to 2 feet or
less in the late evening and overnight.

See Lake Erie Open Lake Forecast for days 3 through 5.

The water temperature at Belle Isle is 70 degrees.

$$

KGK

You can obtain your latest National Weather Service forecasts online
a www.weather.gov/greatlakes