FZUS53 KDTX 211937
NSHDTX

Nearshore Marine Forecast for Michigan
National Weather Service Detroit/Pontiac MI
337 PM EDT Tue Apr 21 2026

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.

LHZ422-220400-
Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
337 PM EDT Tue Apr 21 2026

.TONIGHT...Southwest winds 10 to 15 knots becoming west 5 to
10 knots this evening, then veering to the north after midnight.
Mostly clear. Waves 2 feet or less.
.WEDNESDAY...Northeast winds 5 to 10 knots veering to the east
early in the afternoon. Sunny. Waves 2 feet or less.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Clear. Waves 2 feet
or less.
.THURSDAY...East winds 5 to 10 knots becoming northeast 10 to
15 knots early in the afternoon. Mostly sunny becoming partly
cloudy in the late morning and early afternoon becoming mostly
sunny. Waves 2 feet or less.

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

$$

LHZ421-220400-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-
337 PM EDT Tue Apr 21 2026

.TONIGHT...Southwest winds 10 to 15 knots veering to the north
after midnight. Mostly clear. Waves 2 feet or less.
.WEDNESDAY...North winds 5 to 10 knots veering to the northeast
early in the afternoon. Mostly sunny. Waves 2 feet or less.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Clear. Waves 2 feet
or less.
.THURSDAY...East winds 5 to 10 knots increasing to 10 to 15 knots
early in the afternoon. Mostly sunny early in the morning
becoming partly cloudy. Waves 2 feet or less.

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

$$

LHZ441-220400-
Port Austin to Harbor Beach MI-
337 PM EDT Tue Apr 21 2026

.TONIGHT...Southwest winds 5 to 10 knots becoming northwest 10 to
15 knots after midnight, then becoming north 5 to 10 knots early
in the morning. Mostly clear. Waves 1 to 3 feet.
.WEDNESDAY...North winds 5 to 10 knots. Mostly sunny. Waves
2 feet or less.
.WEDNESDAY NIGHT...East winds 5 to 10 knots early in the evening
becoming light and variable. Clear. Waves 2 feet or less.
.THURSDAY...East winds 5 to 10 knots increasing to 10 to 15 knots
early in the 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.

$$

LHZ442-220400-
Harbor Beach to Port Sanilac MI-
337 PM EDT Tue Apr 21 2026

.TONIGHT...South winds 5 to 10 knots veering to the northwest
after midnight. Mostly clear. Waves 1 to 3 feet.
.WEDNESDAY...North winds 5 to 10 knots. Mostly sunny. Waves
2 feet or less.
.WEDNESDAY NIGHT...North winds 5 to 10 knots early in the evening
becoming light and variable. Clear. Waves 2 feet or less.
.THURSDAY...East winds 5 to 10 knots. Mostly sunny. Waves 2 feet
or less.

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

$$

LHZ443-220400-
Port Sanilac to Port Huron MI-
337 PM EDT Tue Apr 21 2026

.TONIGHT...South winds 10 to 15 knots becoming southwest 5 to
10 knots this evening, then veering to the northwest after
midnight. Partly cloudy. A slight chance of showers in the
evening. Waves 2 feet or less.
.WEDNESDAY...North winds 5 to 10 knots. Mostly sunny. Waves
2 feet or less.
.WEDNESDAY NIGHT...Northeast winds 5 to 10 knots until early
morning becoming light and variable. Mostly clear. Waves 2 feet
or less.
.THURSDAY...East winds 5 to 10 knots. Mostly sunny. Waves 2 feet
or less.

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

$$

LEZ444-220400-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
337 PM EDT Tue Apr 21 2026

.TONIGHT...Southwest winds 10 to 15 knots becoming west 5 to
10 knots in the late evening and overnight. Mostly cloudy with a
chance of showers and a slight chance of thunderstorms in the
evening, then partly cloudy with a slight chance of showers after
midnight. Waves 2 feet or less.
.WEDNESDAY...Northwest winds 5 to 10 knots early in the morning
becoming light and variable. Partly cloudy early in the morning
then clearing. Waves 2 feet or less.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Mostly clear. Waves
2 feet or less.
.THURSDAY...East winds 5 to 10 knots. 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 47 degrees.

$$

TF

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