566
FZUS53 KDTX 221343
NSHDTX

Nearshore Marine Forecast for Michigan
National Weather Service Detroit/Pontiac MI
943 AM EDT Fri Aug 22 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.

LHZ422-222145-
Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
943 AM EDT Fri Aug 22 2025

.REST OF TODAY...Light and variable winds becoming south 5 to
10 knots in the afternoon. Mostly sunny. Waves 2 feet or less.
.TONIGHT...South winds 5 to 10 knots becoming southwest 10 to
15 knots in the late evening and overnight. Partly cloudy. Waves
2 feet or less.
.SATURDAY...Southwest winds 10 to 15 knots increasing to 15 to
20 knots early in the afternoon. Partly cloudy until late
afternoon becoming mostly sunny. A chance of showers. A chance of
thunderstorms early in the afternoon. A chance of waterspouts in
the late morning and afternoon. Waves 1 to 3 feet.
.SATURDAY NIGHT...West winds 15 to 20 knots diminishing to 10 to
15 knots after midnight. Mostly clear. A chance of showers and
thunderstorms early in the evening. A chance of waterspouts early
in the evening. Waves 1 to 3 feet.

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

$$

LHZ421-222145-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-
943 AM EDT Fri Aug 22 2025

.REST OF TODAY...Southwest winds 5 to 10 knots. Mostly sunny.
Waves 2 feet or less.
.TONIGHT...South winds 5 to 10 knots becoming southwest 10 to
15 knots in the late evening and overnight. Partly cloudy. Waves
2 feet or less.
.SATURDAY...Southwest winds 10 to 15 knots increasing to 15 to
20 knots early in the afternoon. Partly cloudy. A chance of
showers. A chance of thunderstorms early in the afternoon. A
chance of waterspouts in the late morning and afternoon. Waves
1 to 3 feet.
.SATURDAY NIGHT...West winds 15 to 20 knots diminishing to 10 to
15 knots after midnight. Mostly clear. A chance of showers and
thunderstorms early in the evening. A chance of waterspouts early
in the evening. Waves 1 to 3 feet.

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

$$

LHZ441-222145-
Port Austin to Harbor Beach MI-
943 AM EDT Fri Aug 22 2025

.REST OF TODAY...Southwest winds 5 to 10 knots backing to the
southeast late in the afternoon. Mostly sunny. Waves 2 feet or
less.
.TONIGHT...Southeast winds 5 to 10 knots becoming south 10 to
15 knots in the late evening and overnight. Partly cloudy. Waves
2 feet or less.
.SATURDAY...Southwest winds 10 to 15 knots. Mostly cloudy early
in the morning becoming partly cloudy. A chance of showers until
late afternoon, then showers likely and a chance of thunderstorms
early in the afternoon. A chance of waterspouts in the late
morning and afternoon. Waves 1 to 3 feet.
.SATURDAY NIGHT...West winds 10 to 15 knots. Mostly clear. Light
showers likely and a chance of thunderstorms early in the
evening. A chance of waterspouts early in the evening. Waves 1 to
3 feet.

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

$$

LHZ442-222145-
Harbor Beach to Port Sanilac MI-
943 AM EDT Fri Aug 22 2025

.REST OF TODAY...Light and variable winds becoming southeast 5 to
10 knots in the afternoon. Mostly sunny. Waves 2 feet or less.
.TONIGHT...Southeast winds 5 to 10 knots becoming south 10 to
15 knots in the late evening and overnight. Partly cloudy. Waves
2 feet or less.
.SATURDAY...Southwest winds 10 to 15 knots. Mostly cloudy with a
slight chance of showers until late afternoon, then partly cloudy
with a chance of showers and thunderstorms early in the
afternoon. A slight chance of until late afternoon. A chance of
waterspouts early in the afternoon. Waves 2 feet or less.
.SATURDAY NIGHT...West winds 10 to 15 knots. Mostly clear. A
chance of thunderstorms early in the evening. A chance of
waterspouts early in the evening. Waves 2 feet or less.

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

$$

LHZ443-222145-
Port Sanilac to Port Huron MI-
943 AM EDT Fri Aug 22 2025

.REST OF TODAY...Light and variable winds becoming east 5 to
10 knots late in the afternoon. Mostly sunny. Waves 2 feet or
less.
.TONIGHT...Southeast winds 5 to 10 knots becoming southwest 10 to
15 knots after midnight. Partly cloudy. Waves 2 feet or less.
.SATURDAY...Southwest winds 5 to 10 knots increasing to 10 to
15 knots in the late morning and afternoon. Partly cloudy. A
chance of showers and thunderstorms early in the afternoon. A
chance of waterspouts early in the afternoon. Waves 2 feet or
less.
.SATURDAY NIGHT...West winds 10 to 15 knots. Mostly clear. A
chance of waterspouts early in the evening. A chance of showers
and thunderstorms early in the evening, then a chance of showers
in the late evening and early morning. Waves 2 feet or less.

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

$$

LEZ444-222145-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
943 AM EDT Fri Aug 22 2025

.REST OF TODAY...Northeast winds 5 to 10 knots veering to the
southeast late in the afternoon. Mostly sunny. Waves 2 feet or
less.
.TONIGHT...Southeast winds 5 to 10 knots veering to the southwest
after midnight. Mostly clear. Waves 2 feet or less.
.SATURDAY...Southwest winds 5 to 10 knots increasing to 10 to
15 knots early in the afternoon. Partly cloudy until late
afternoon becoming mostly cloudy. A slight chance of. Waves
2 feet or less.
.SATURDAY NIGHT...West winds 10 to 15 knots. Mostly cloudy early
in the evening then clearing. Waves 2 feet or less.

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

The water temperature at Belle Isle is 73 degrees.

$$

SF

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