100
FZUS53 KDTX 202043
NSHDTX

Nearshore Marine Forecast for Michigan
National Weather Service Detroit/Pontiac MI
343 PM EST Thu Nov 20 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.

LHZ422-210445-
Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
343 PM EST Thu Nov 20 2025

.TONIGHT...South winds 10 to 15 knots becoming southwest 15 to
20 knots in the late evening and early morning, then becoming
west 10 to 15 knots early in the morning. Mostly cloudy. Waves
1 to 3 feet.
.FRIDAY...West winds 10 to 15 knots. Partly cloudy until late
afternoon then clearing. Waves 2 feet or less.
.FRIDAY NIGHT...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 until
late afternoon becoming partly cloudy. Waves 2 feet or less.

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

$$

LHZ421-210445-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-
343 PM EST Thu Nov 20 2025

.TONIGHT...Southwest winds 15 to 20 knots. Mostly cloudy. Waves
1 to 3 feet building to 2 to 4 feet in the late evening and
overnight.
.FRIDAY...West winds 10 to 15 knots. Partly cloudy early in the
morning then clearing. Waves 2 to 4 feet subsiding to 1 to 3 feet
in the late morning and afternoon.
.FRIDAY NIGHT...Northwest winds 15 to 20 knots diminishing to
10 to 15 knots after midnight. Mostly clear. Waves 2 to 4 feet.
.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 1 to 3 feet.

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

$$

LHZ441-210445-
Port Austin to Harbor Beach MI-
343 PM EST Thu Nov 20 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM FRIDAY EVENING THROUGH
LATE FRIDAY NIGHT...

.TONIGHT...South winds 10 to 15 knots becoming southwest 15 to
20 knots in the late evening and overnight. Cloudy. A slight
chance of light rain after midnight. Waves 1 to 3 feet building
to 2 to 4 feet after midnight.
.FRIDAY...West winds 10 to 15 knots. Partly cloudy until late
afternoon then clearing. Waves 2 to 4 feet subsiding to 1 to 3
feet in the late morning and afternoon.
.FRIDAY NIGHT...Northwest winds 15 to 20 knots diminishing to
10 to 15 knots after midnight. Partly cloudy. Waves 3 to 5 feet.
.SATURDAY...Northwest winds 10 to 15 knots diminishing to 5 to
10 knots in the late morning and afternoon. Mostly cloudy early
in the morning becoming partly cloudy. Waves 2 to 4 feet
subsiding to 1 to 3 feet in the late morning and afternoon.

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

$$

LHZ442-210445-
Harbor Beach to Port Sanilac MI-
343 PM EST Thu Nov 20 2025

.TONIGHT...Southwest winds 10 to 15 knots. Mostly cloudy. Waves
1 to 3 feet.
.FRIDAY...West winds 10 to 15 knots. Partly cloudy until late
afternoon becoming mostly sunny. Waves 2 feet or less.
.FRIDAY NIGHT...Northwest winds 10 to 15 knots. Partly cloudy.
Waves 1 to 3 feet building to 2 to 4 feet after midnight.
.SATURDAY...Northwest winds 10 to 15 knots diminishing to 5 to
10 knots early in the afternoon. Partly cloudy. Waves 1 to
3 feet.

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

$$

LHZ443-210445-
Port Sanilac to Port Huron MI-
343 PM EST Thu Nov 20 2025

.TONIGHT...Southwest winds 10 to 15 knots. Cloudy. Waves 2 feet
or less.
.FRIDAY...West winds 10 to 15 knots. Mostly cloudy becoming
partly cloudy in the late morning and early afternoon becoming
mostly sunny. Waves 2 feet or less.
.FRIDAY NIGHT...Northwest winds 10 to 15 knots. Partly cloudy.
Waves 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 15 knots diminishing to 5 to
10 knots early in the afternoon. Partly cloudy. Waves 1 to
3 feet.

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

$$

LEZ444-210445-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
343 PM EST Thu Nov 20 2025

.TONIGHT...Southwest winds 5 to 10 knots. Cloudy. Waves 2 feet or
less.
.FRIDAY...West winds 5 to 10 knots. Mostly cloudy. Waves 2 feet
or less.
.FRIDAY NIGHT...North winds 5 to 10 knots increasing to 10 to
15 knots after midnight. Mostly cloudy. Waves 2 feet or less.
.SATURDAY...North winds 10 to 15 knots becoming northwest 5 to
10 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 43 degrees.

$$

KDK

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