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FZUS53 KDTX 240147
NSHDTX

Nearshore Marine Forecast for Michigan
National Weather Service Detroit/Pontiac MI
947 PM EDT Wed Jul 23 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.

LHZ422-241000-
Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
947 PM EDT Wed Jul 23 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY AFTERNOON THROUGH
THURSDAY EVENING...

.REST OF TONIGHT...South winds 15 to 20 knots. Partly cloudy.
Waves 1 to 3 feet.
.THURSDAY...Southwest winds 15 to 20 knots. Mostly sunny early,
then becoming partly cloudy. Showers likely and a chance of
thunderstorms in the afternoon. Waves 1 to 3 feet building to 2 to
4 feet early in the afternoon.
.THURSDAY NIGHT...West winds 15 to 20 knots diminishing to 10 to
15 knots in the late evening and overnight. Partly cloudy.
Showers likely and a chance of thunderstorms until early morning,
then a chance of showers after midnight. Waves 1 to 3 feet.
.FRIDAY...North winds 10 to 15 knots veering to the northeast
early in the afternoon. Partly cloudy. A chance of showers early
in the morning. Waves 2 feet or less.

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

$$

LHZ421-241000-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-
947 PM EDT Wed Jul 23 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY AFTERNOON THROUGH
THURSDAY EVENING...

.REST OF TONIGHT...South winds 15 to 20 knots. Partly cloudy with
a slight chance of showers. Waves 1 to 3 feet building to 2 to 4
feet early in the morning.
.THURSDAY...Southwest winds 15 to 20 knots. Mostly sunny early,
then becoming partly cloudy. Showers likely and a chance of
thunderstorms early in the afternoon. Waves 1 to 3 feet building
to 2 to 4 feet in the late morning and afternoon.
.THURSDAY NIGHT...West winds 15 to 20 knots diminishing to 10 to
15 knots in the late evening and overnight. Partly cloudy.
Showers likely and a chance of thunderstorms until early morning,
then a chance of showers after midnight. Waves 2 to 4 feet
subsiding to 1 to 3 feet in the late evening and overnight.
.FRIDAY...North winds 10 to 15 knots veering to the northeast
early in the afternoon. Partly cloudy. A chance of showers early
in the morning. Waves 2 feet or less.

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

$$

LHZ441-241000-
Port Austin to Harbor Beach MI-
947 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...South winds 10 to 15 knots. Mostly clear with
a slight chance of showers and thunderstorms. Waves 1 to 3 feet.
.THURSDAY...Southwest winds 10 to 15 knots increasing to 15 to
20 knots in the late morning and afternoon. Mostly sunny in the
morning. Partly cloudy with a chance of showers and thunderstorms
in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet early
in the afternoon.
.THURSDAY NIGHT...West winds 15 to 20 knots diminishing to 10 to
15 knots in the late evening and overnight. Partly cloudy with
showers likely and a chance of thunderstorms until early morning,
then mostly cloudy with a chance of showers after midnight. Waves
2 to 4 feet subsiding to 1 to 3 feet in the late evening and
overnight.
.FRIDAY...North winds 10 to 15 knots diminishing to 5 to 10 knots
early in the afternoon. Mostly cloudy with a chance of showers
early in the morning, then partly cloudy in the late morning and
afternoon. Waves 2 feet or less.

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

$$

LHZ442-241000-
Harbor Beach to Port Sanilac MI-
947 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...South winds 10 to 15 knots. Mostly clear.
Waves 1 to 3 feet.
.THURSDAY...Southwest winds 10 to 15 knots. Mostly sunny in the
morning. Partly cloudy with a chance of showers and thunderstorms
in the afternoon. Waves 2 feet or less.
.THURSDAY NIGHT...West winds 10 to 15 knots diminishing to 5 to
10 knots after midnight. Partly cloudy with showers likely and a
chance of thunderstorms until early morning, then mostly cloudy
with a chance of showers after midnight. Waves 2 feet or less.
.FRIDAY...North winds 5 to 10 knots. Mostly cloudy with a chance
of showers early in the morning, then partly cloudy. Waves 2 feet
or less.

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

$$

LHZ443-241000-
Port Sanilac to Port Huron MI-
947 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...South winds 10 to 15 knots. Mostly clear.
Waves 1 to 3 feet.
.THURSDAY...Southwest winds 10 to 15 knots. Mostly sunny in the
morning. Partly cloudy with a chance of showers and thunderstorms
in the afternoon. Waves 2 feet or less.
.THURSDAY NIGHT...Southwest winds 10 to 15 knots becoming west
5 to 10 knots after midnight. Partly cloudy with showers likely
and a chance of thunderstorms until early morning, then mostly
cloudy with a chance of showers after midnight. Waves 2 feet or
less.
.FRIDAY...North winds 5 to 10 knots. Mostly cloudy with a chance
of showers until late afternoon, then partly cloudy early in the
afternoon. Waves 2 feet or less.

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

$$

LEZ444-241000-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
947 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...South winds 5 to 10 knots becoming southwest
10 to 15 knots early in the morning. Mostly clear. Waves 2 feet
or less.
.THURSDAY...Southwest winds 10 to 15 knots. Mostly sunny in the
morning. Partly cloudy with a chance of showers and a slight
chance of thunderstorms in the afternoon. Waves 2 feet or less.
.THURSDAY NIGHT...Southwest winds 10 to 15 knots. Partly cloudy
until early morning becoming mostly cloudy. A chance of showers
and thunderstorms until early morning, then showers likely and a
chance of thunderstorms after midnight. Waves 2 feet or less.
.FRIDAY...West winds 5 to 10 knots. Mostly cloudy early in the
morning becoming partly cloudy. 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.

$$

MANN

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