340
FZUS53 KDTX 230126
NSHDTX

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

LHZ422-230930-
Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
926 PM EDT Fri Aug 22 2025

.REST OF TONIGHT...Southwest winds 10 to 15 knots. 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 slight chance of showers until
late afternoon. A slight chance of thunderstorms in the late
morning and afternoon. A chance of showers early in the
afternoon. A slight chance of waterspouts in the late morning and
early afternoon. A chance of waterspouts early in the afternoon.
Waves 1 to 3 feet.
.SATURDAY NIGHT...West winds 15 to 20 knots diminishing to 10 to
15 knots in the late evening and overnight. Mostly clear. A
slight chance of showers and thunderstorms early in the evening.
A slight chance of waterspouts early in the evening. Waves 1 to
3 feet.
.SUNDAY...West winds 10 to 15 knots increasing to 15 to 20 knots
early in the afternoon. Mostly sunny. Waves 1 to 3 feet.

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

$$

LHZ421-230930-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-
926 PM EDT Fri Aug 22 2025

.REST OF TONIGHT...Southwest winds 10 to 15 knots. Partly cloudy.
Waves 2 feet or less.
.SATURDAY...Southwest winds 10 to 15 knots increasing to 15 to
20 knots early in the afternoon. Mostly cloudy becoming partly
cloudy in the late morning and early afternoon becoming mostly
sunny. A slight chance of showers until late afternoon. A slight
chance of thunderstorms in the late morning and afternoon. A
chance of showers early in the afternoon. A slight chance of
waterspouts in the late morning and early afternoon. A chance of
waterspouts early in the afternoon. Waves 1 to 3 feet.
.SATURDAY NIGHT...West winds 15 to 20 knots becoming northwest
10 to 15 knots in the late evening and overnight. 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.
.SUNDAY...West winds 10 to 15 knots increasing to 15 to 20 knots
early in the afternoon. Mostly sunny. A chance of showers early
in the afternoon. Waves 1 to 3 feet.

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

$$

LHZ441-230930-
Port Austin to Harbor Beach MI-
926 PM EDT Fri Aug 22 2025

.REST OF TONIGHT...South winds 10 to 15 knots. Partly cloudy.
Waves 2 feet or less.
.SATURDAY...Southwest winds 10 to 15 knots. Mostly cloudy early
in the morning becoming partly cloudy. A slight chance of showers
until late afternoon, then a chance of showers and thunderstorms
early in the afternoon. A slight chance of waterspouts in the
late morning and early afternoon. A chance of waterspouts early
in the afternoon. Waves 1 to 3 feet.
.SATURDAY NIGHT...West winds 10 to 15 knots. 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.
.SUNDAY...West winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and afternoon. Mostly sunny. A chance of
showers early in the afternoon. Waves 1 to 3 feet.

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

$$

LHZ442-230930-
Harbor Beach to Port Sanilac MI-
926 PM EDT Fri Aug 22 2025

.REST OF TONIGHT...South winds 5 to 10 knots becoming southwest
10 to 15 knots after midnight. 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 waterspouts in the late morning and
early afternoon. A chance of waterspouts early in the afternoon.
Waves 2 feet or less.
.SATURDAY NIGHT...West winds 10 to 15 knots diminishing to 5 to
10 knots after midnight. Mostly clear. A chance of showers and
thunderstorms early in the evening. A slight chance of
waterspouts until early morning. Waves 2 feet or less.
.SUNDAY...West winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and afternoon. Mostly sunny until late
afternoon becoming partly cloudy. A chance of showers early in
the afternoon. A chance of waterspouts early in the afternoon.
Waves 2 feet or less.

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

$$

LHZ443-230930-
Port Sanilac to Port Huron MI-
926 PM EDT Fri Aug 22 2025

.REST OF TONIGHT...South winds 5 to 10 knots increasing to 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
slight chance of showers until late afternoon, then a chance of
showers and thunderstorms early in the afternoon. A slight 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 showers and thunderstorms early in the evening. A
slight chance of waterspouts until early morning. Waves 2 feet or
less.
.SUNDAY...West winds 5 to 10 knots increasing to 10 to 15 knots
early in the afternoon. Mostly sunny. Waves 2 feet or less.

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

$$

LEZ444-230930-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
926 PM EDT Fri Aug 22 2025

.REST OF TONIGHT...South winds 5 to 10 knots veering to the
southwest early in the morning. 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. A chance of
showers and thunderstorms early in the afternoon. Waves 2 feet or
less.
.SATURDAY NIGHT...West winds 10 to 15 knots diminishing to 5 to
10 knots after midnight. Partly cloudy. A chance of showers and
thunderstorms early in the evening. A slight chance of
waterspouts early in the evening. Waves 2 feet or less.
.SUNDAY...West winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and afternoon. Mostly sunny. Waves 2 feet or
less.

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

The water temperature at Belle Isle is 74 degrees.

$$

SC

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