838
FZUS53 KDTX 171958
NSHDTX

Nearshore Marine Forecast for Michigan
National Weather Service Detroit/Pontiac MI
358 PM 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.

LHZ422-180400-
Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
358 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

.TONIGHT...Northeast winds 20 to 25 knots diminishing to 15 to
20 knots in the late evening and overnight. Clear. Waves 2 to
4 feet.
.MONDAY...East winds 15 to 20 knots diminishing to 10 to 15 knots
in the late morning and afternoon. Mostly sunny. Waves 1 to
3 feet.
.MONDAY NIGHT...Southeast winds 15 to 20 knots. Partly cloudy. A
chance of showers. A chance of thunderstorms after midnight.
Waves 1 to 3 feet.
.TUESDAY...South winds 10 to 15 knots. Mostly cloudy. A chance of
thunderstorms early in the morning. A chance of showers, then a
chance of thunderstorms early in the afternoon. A chance of
waterspouts early in the afternoon. Waves 1 to 3 feet.

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

$$

LHZ421-180400-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-
358 PM EDT Sun Aug 17 2025

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

.TONIGHT...Northeast winds 20 to 25 knots diminishing to 15 to
20 knots in the late evening and overnight. Clear. Waves 4 to
6 feet. Waves occasionally around 8 feet.
.MONDAY...East winds 15 to 20 knots diminishing to 10 to 15 knots
in the late morning and afternoon. Mostly sunny. Waves 3 to
5 feet subsiding to 1 to 3 feet early in the afternoon. Waves
occasionally around 7 feet.
.MONDAY NIGHT...Southeast winds 15 to 20 knots. Partly cloudy. A
chance of showers. A chance of thunderstorms after midnight.
Waves 1 to 3 feet.
.TUESDAY...South winds 10 to 15 knots. Mostly cloudy. A chance of
showers and thunderstorms early in the morning. Showers likely in
the late morning and afternoon. A chance of thunderstorms early
in the afternoon. A chance of waterspouts early in the afternoon.
Waves 1 to 3 feet.

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

$$

LHZ441-180400-
Port Austin to Harbor Beach MI-
358 PM EDT Sun Aug 17 2025

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

.TONIGHT...Northeast winds 15 to 20 knots. Clear. Waves 4 to
6 feet. Waves occasionally around 8 feet.
.MONDAY...East winds 15 to 20 knots becoming southeast 10 to
15 knots in the late morning and afternoon. Sunny. Waves 3 to
5 feet subsiding to 1 to 3 feet early in the afternoon. Waves
occasionally around 7 feet.
.MONDAY NIGHT...Southeast winds 10 to 15 knots increasing to
15 to 20 knots after midnight. Partly cloudy. A chance of showers
until early morning, then a chance of showers and thunderstorms
after midnight. Waves 1 to 3 feet building to 2 to 4 feet after
midnight.
.TUESDAY...South winds 10 to 15 knots. Mostly cloudy. Light
showers likely until late afternoon, then showers likely and a
chance of thunderstorms early in the afternoon. A chance of
waterspouts early in the afternoon. Waves 1 to 3 feet.

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

$$

LHZ442-180400-
Harbor Beach to Port Sanilac MI-
358 PM EDT Sun Aug 17 2025

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

.TONIGHT...North winds 20 to 25 knots with gusts to 30 knots
becoming northeast 15 to 20 knots in the late evening and
overnight. Mostly clear. Waves 4 to 6 feet. Waves occasionally
around 8 feet.
.MONDAY...East winds 10 to 15 knots diminishing to 5 to 10 knots
early in the afternoon. Mostly sunny. Waves 2 to 4 feet subsiding
to 1 to 3 feet in the late morning and afternoon.
.MONDAY NIGHT...East winds 5 to 10 knots becoming southeast 10 to
15 knots in the late evening and overnight. Partly cloudy. Waves
1 to 3 feet.
.TUESDAY...Southeast winds 10 to 15 knots. Mostly cloudy. A
chance of showers and thunderstorms in the late morning and
afternoon. A chance of waterspouts early in the afternoon. Waves
1 to 3 feet.

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

$$

LHZ443-180400-
Port Sanilac to Port Huron MI-
358 PM EDT Sun Aug 17 2025

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

.TONIGHT...North winds 20 to 25 knots becoming northeast 15 to
20 knots after midnight. Mostly clear. Waves 4 to 6 feet. Waves
occasionally around 8 feet.
.MONDAY...East winds 10 to 15 knots diminishing to 5 to 10 knots
early in the afternoon. Mostly sunny. Waves 2 to 4 feet subsiding
to 1 to 3 feet in the late morning and afternoon.
.MONDAY NIGHT...East winds 5 to 10 knots becoming southeast 10 to
15 knots in the late evening and overnight. Mostly clear. Waves
1 to 3 feet.
.TUESDAY...Southeast winds 10 to 15 knots diminishing to 5 to
10 knots in the late morning and afternoon. Partly cloudy with a
chance of showers early in the morning, then mostly cloudy with a
chance of showers and thunderstorms in the late morning and
afternoon. Waves 1 to 3 feet.

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

$$

LEZ444-180400-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
358 PM EDT Sun Aug 17 2025

.TONIGHT...Northeast winds 15 to 20 knots diminishing to 10 to
15 knots after midnight. Mostly clear. Waves 1 to 3 feet.
.MONDAY...East winds 10 to 15 knots. Partly cloudy early in the
morning then clearing. Waves 1 to 3 feet.
.MONDAY NIGHT...East winds 10 to 15 knots diminishing to 5 to
10 knots after midnight. Mostly clear. Waves 1 to 3 feet.
.TUESDAY...South winds 5 to 10 knots. Mostly sunny with a chance
of showers early in the morning, then partly cloudy with a chance
of showers and thunderstorms in the late morning and afternoon. A
chance of waterspouts early in the afternoon. Waves 2 feet or
less.

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

The water temperature at Belle Isle is 79 degrees.

$$

SF

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