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FZUS53 KDTX 190755
NSHDTX

Nearshore Marine Forecast for Michigan
National Weather Service Detroit/Pontiac MI
355 AM EDT Tue Aug 19 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.

LHZ422-191600-
Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
355 AM EDT Tue Aug 19 2025

.TODAY...Southeast winds 15 to 20 knots diminishing to 10 to
15 knots in the late morning and afternoon. Cloudy. Showers
likely and a chance of thunderstorms in the morning, then a
chance of showers in the afternoon. Waves 1 to 3 feet.
.TONIGHT...Northeast winds 10 to 15 knots. Mostly cloudy. A
chance of showers and a slight chance of thunderstorms early in
the evening. Waves 1 to 3 feet.
.WEDNESDAY...Northeast winds 15 to 20 knots. Mostly cloudy
becoming partly cloudy in the late morning and early afternoon
becoming sunny. Waves 2 to 4 feet.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots diminishing to
10 to 15 knots after midnight. Clear. Waves 2 to 4 feet subsiding
to 1 to 3 feet in the late evening and overnight.

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

$$

LHZ421-191600-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-
355 AM EDT Tue Aug 19 2025

.TODAY...Southeast winds 10 to 15 knots. Showers and a slight
chance of thunderstorms in the morning, then showers in the
afternoon. Waves 1 to 3 feet.
.TONIGHT...Northeast winds 10 to 15 knots. Mostly cloudy. A
chance of showers and a slight chance of thunderstorms early in
the evening, then a slight chance of showers in the late evening
and early morning. Waves 1 to 3 feet.
.WEDNESDAY...Northeast winds 15 to 20 knots. Mostly cloudy becoming
partly cloudy in the late morning and early afternoon becoming sunny.
Waves 3 to 5 feet. Waves occasionally around 7 feet. A Small Craft
Advisory may be needed.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots diminishing to
10 to 15 knots after midnight. Clear. Waves 2 to 4 feet subsiding
to 1 to 3 feet after midnight.

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

$$

LHZ441-191600-
Port Austin to Harbor Beach MI-
355 AM EDT Tue Aug 19 2025

.TODAY...Southeast winds 10 to 15 knots. Showers and a slight
chance of thunderstorms. Waves 2 to 4 feet subsiding to 1 to
3 feet in the late morning and afternoon.
.TONIGHT...Northeast winds 5 to 10 knots increasing to 10 to
15 knots after midnight. Cloudy. Showers likely and a slight
chance of thunderstorms early in the evening, then a slight
chance of showers in the late evening and early morning. Waves
1 to 3 feet.
.WEDNESDAY...Northeast winds 15 to 20 knots. Mostly cloudy becoming
partly cloudy in the late morning and early afternoon becoming mostly
sunny. Waves 3 to 5 feet. Waves occasionally around 7 feet. A Small
Craft Advisory may be needed.
.WEDNESDAY NIGHT...North winds 15 to 20 knots becoming northeast
10 to 15 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.

$$

LHZ442-191600-
Harbor Beach to Port Sanilac MI-
355 AM EDT Tue Aug 19 2025

.TODAY...Southeast winds 10 to 15 knots. Showers and a slight
chance of thunderstorms. Waves 1 to 3 feet.
.TONIGHT...East winds 5 to 10 knots becoming northeast 10 to
15 knots after midnight. Mostly cloudy. Showers likely and a
slight chance of thunderstorms early in the evening, then a
slight chance of showers in the late evening and early morning.
Waves 1 to 3 feet.
.WEDNESDAY...Northeast winds 15 to 20 knots. Mostly cloudy becoming
partly cloudy in the late morning and early afternoon becoming mostly
sunny. Waves 3 to 5 feet. Waves occasionally around 7 feet. A Small
Craft Advisory may be needed.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots diminishing to
10 to 15 knots after midnight. Mostly clear. Waves 3 to 5 feet.
Waves occasionally around 7 feet.

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

$$

LHZ443-191600-
Port Sanilac to Port Huron MI-
355 AM EDT Tue Aug 19 2025

.TODAY...Southeast winds 10 to 15 knots. Showers and a chance of
thunderstorms. Waves 1 to 3 feet.
.TONIGHT...East winds 5 to 10 knots becoming northeast 10 to
15 knots after midnight. Mostly cloudy. Showers likely and a
chance of thunderstorms early in the evening, then a chance of
showers in the late evening and early morning. Waves 2 feet or
less.
.WEDNESDAY...North winds 15 to 20 knots. Mostly cloudy becoming
partly cloudy in the late morning and early afternoon becoming mostly
sunny. Waves 3 to 5 feet. Waves occasionally around 7 feet. A Small
Craft Advisory may be needed.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots diminishing to
10 to 15 knots after midnight. Mostly clear. Waves 3 to 5 feet.
Waves occasionally around 7 feet.

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

$$

LEZ444-191600-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
355 AM EDT Tue Aug 19 2025

.TODAY...South winds 5 to 10 knots. Showers and a chance of
thunderstorms in the morning, then showers with thunderstorms
likely in the afternoon. Waves 2 feet or less.
.TONIGHT...Northeast winds 5 to 10 knots increasing to 10 to
15 knots after midnight. Mostly cloudy. Showers and thunderstorms
likely early in the evening, then a chance of showers and a
slight chance of thunderstorms in the late evening and early
morning. Waves 2 feet or less.
.WEDNESDAY...North winds 10 to 15 knots. Mostly cloudy until late
afternoon becoming partly cloudy. Waves 2 feet or less.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 knots increasing to
15 to 20 knots in the late evening and overnight. Mostly clear.
Waves 1 to 3 feet.

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

The water temperature at Belle Isle is 76 degrees.

$$

BT

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