520
FZUS53 KDTX 211439
NSHDTX

Nearshore Marine Forecast for Michigan
National Weather Service Detroit/Pontiac MI
939 AM EST Fri Nov 21 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.

LHZ422-212300-
Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
939 AM EST Fri Nov 21 2025

.REST OF TODAY...West winds 10 to 15 knots. Partly cloudy. Waves
2 feet or less.
.TONIGHT...Northwest winds 10 to 15 knots. Mostly clear. Waves
2 feet or less.
.SATURDAY...Northwest winds 10 to 15 knots becoming west 5 to
10 knots in the late morning and afternoon. Mostly sunny early in
the morning becoming partly cloudy. Waves 2 feet or less.
.SATURDAY NIGHT...Southwest winds 10 to 15 knots increasing to
15 to 20 knots in the late evening and overnight. Mostly cloudy
early in the evening becoming partly cloudy. Waves 1 to 3 feet
building to 2 to 4 feet in the late evening and overnight.

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

$$

LHZ421-212300-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-
939 AM EST Fri Nov 21 2025

.REST OF TODAY...West winds 10 to 15 knots. Partly cloudy. Waves
1 to 3 feet.
.TONIGHT...Northwest winds 15 to 20 knots diminishing to 10 to
15 knots in the late evening and overnight. Mostly clear. Waves
1 to 3 feet.
.SATURDAY...Northwest winds 10 to 15 knots becoming west 5 to
10 knots in the late morning and afternoon. Mostly sunny until
late afternoon becoming partly cloudy. Waves 1 to 3 feet.
.SATURDAY NIGHT...Southwest winds 10 to 15 knots increasing to
15 to 20 knots in the late evening and overnight. Mostly cloudy
until early morning becoming partly cloudy. Waves 1 to 3 feet
building to 2 to 4 feet in the late evening and overnight.

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

$$

LHZ441-212300-
Port Austin to Harbor Beach MI-
939 AM EST Fri Nov 21 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EST THIS EVENING
THROUGH LATE TONIGHT...

.REST OF TODAY...West winds 10 to 15 knots. Partly cloudy. Waves
1 to 3 feet.
.TONIGHT...Northwest winds 10 to 15 knots. Partly cloudy. Waves
3 to 5 feet.
.SATURDAY...Northwest winds 10 to 15 knots becoming west 5 to
10 knots in the late morning and afternoon. Partly cloudy. Waves
2 to 4 feet subsiding to 1 to 3 feet in the late morning and
afternoon.
.SATURDAY NIGHT...Southwest winds 10 to 15 knots increasing to
15 to 20 knots in the late evening and overnight. Mostly cloudy
until early morning becoming partly cloudy. Waves 1 to 3 feet
building to 2 to 4 feet after midnight.

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

$$

LHZ442-212300-
Harbor Beach to Port Sanilac MI-
939 AM EST Fri Nov 21 2025

.REST OF TODAY...West winds 10 to 15 knots. Partly cloudy. Waves
2 feet or less.
.TONIGHT...Northwest winds 10 to 15 knots. Partly cloudy. Waves
1 to 3 feet.
.SATURDAY...Northwest winds 10 to 15 knots becoming west 5 to
10 knots in the late morning and afternoon. Partly cloudy. Waves
1 to 3 feet.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots increasing to
15 to 20 knots. Mostly cloudy until early morning becoming partly
cloudy. Waves 2 feet or less.

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

$$

LHZ443-212300-
Port Sanilac to Port Huron MI-
939 AM EST Fri Nov 21 2025

.REST OF TODAY...West winds 10 to 15 knots. Partly cloudy. Waves
2 feet or less.
.TONIGHT...Northwest winds 10 to 15 knots. Partly cloudy. Waves
2 feet or less.
.SATURDAY...Northwest winds 10 to 15 knots becoming west 5 to
10 knots in the late morning and afternoon. Mostly sunny until
late afternoon becoming partly cloudy. Waves 1 to 3 feet.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots increasing to
15 to 20 knots. Partly cloudy becoming mostly cloudy in the late
evening and early morning becoming partly cloudy. Waves 2 feet or
less.

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

$$

LEZ444-212300-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
939 AM EST Fri Nov 21 2025

.REST OF TODAY...West winds 5 to 10 knots. Mostly cloudy. Patchy
fog late in the morning. Waves 2 feet or less.
.TONIGHT...North winds 5 to 10 knots. Mostly cloudy until early
morning becoming partly cloudy. Waves 2 feet or less.
.SATURDAY...North winds 5 to 10 knots until late afternoon
becoming light and variable. Mostly sunny until late afternoon
becoming partly cloudy. Waves 2 feet or less.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots increasing to
10 to 15 knots in the late evening and overnight. 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 42 degrees.

$$

TF

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