620
FZUS53 KDTX 181947
NSHDTX

Nearshore Marine Forecast for Michigan
National Weather Service Detroit/Pontiac MI
347 PM EDT Fri Apr 18 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.

LHZ422-190400-
Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
347 PM EDT Fri Apr 18 2025

.TONIGHT...Southwest winds 10 to 15 knots increasing to 15 to
20 knots after midnight. Mostly cloudy with a chance of showers
and thunderstorms. Waves 1 to 3 feet building to 2 to 4 feet
after midnight.
.SATURDAY...West winds 15 to 20 knots diminishing to 10 to
15 knots in the late morning and afternoon. Mostly cloudy with a
slight chance of showers in the morning, then partly cloudy in
the afternoon. Waves 1 to 3 feet.
.SATURDAY NIGHT...North winds 10 to 15 knots. Mostly clear. Waves
2 feet or less.
.SUNDAY...Northeast winds 10 to 15 knots. Mostly sunny in the
morning becoming partly cloudy. Waves 1 to 3 feet.

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

$$

LHZ421-190400-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-
347 PM EDT Fri Apr 18 2025

.TONIGHT...Southwest winds 10 to 15 knots increasing to 15 to
20 knots after midnight. Mostly cloudy. A chance of showers and
thunderstorms in the evening, then showers likely and a chance of
thunderstorms after midnight. Waves 1 to 3 feet building to 2 to
4 feet after midnight.
.SATURDAY...West winds 15 to 20 knots diminishing to 10 to
15 knots in the late morning and afternoon. Mostly cloudy with a
slight chance of showers in the morning, then partly cloudy in
the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the
late morning and afternoon.
.SATURDAY NIGHT...Northwest winds 10 to 15 knots. Mostly clear.
Waves 1 to 3 feet.
.SUNDAY...Northeast winds 10 to 15 knots. Mostly sunny in the
morning becoming partly cloudy. Waves 1 to 3 feet.

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

$$

LHZ441-190400-
Port Austin to Harbor Beach MI-
347 PM EDT Fri Apr 18 2025

.TONIGHT...South winds 10 to 15 knots becoming southwest 15 to
20 knots early in the morning. Mostly cloudy with a chance of
showers and thunderstorms. Waves 1 to 3 feet building to 2 to
4 feet early in the morning.
.SATURDAY...West winds 10 to 15 knots. Mostly cloudy with a
chance of showers in the morning, then partly cloudy in the
afternoon. Waves 1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 5 to 10 knots becoming north
10 to 15 knots in the late evening and overnight. Mostly clear.
Waves 1 to 3 feet.
.SUNDAY...North winds 10 to 15 knots becoming northeast 5 to
10 knots in the late morning and afternoon. Mostly sunny in the
morning becoming partly cloudy. Waves 1 to 3 feet.

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

$$

LHZ442-190400-
Harbor Beach to Port Sanilac MI-
347 PM EDT Fri Apr 18 2025

.TONIGHT...Southwest winds 10 to 15 knots increasing to 15 to
20 knots early in the morning. Mostly cloudy with a chance of
showers and thunderstorms. Waves 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 15 knots. Mostly cloudy with a
chance of showers in the morning, then partly cloudy in the
afternoon. Waves 1 to 3 feet.
.SATURDAY NIGHT...North winds 5 to 10 knots increasing to 10 to
15 knots after midnight. Partly cloudy. Waves 1 to 3 feet.
.SUNDAY...North winds 10 to 15 knots becoming northeast 5 to
10 knots in the late morning and early afternoon, then increasing
to 10 to 15 knots early in the afternoon. Mostly sunny in the
morning becoming partly cloudy. Waves 1 to 3 feet.

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

$$

LHZ443-190400-
Port Sanilac to Port Huron MI-
347 PM EDT Fri Apr 18 2025

.TONIGHT...South winds 10 to 15 knots becoming southwest 15 to
20 knots in the late evening and overnight. Mostly cloudy. A
slight chance of showers and thunderstorms in the evening, then a
chance of showers and thunderstorms after midnight. Waves 1 to
3 feet.
.SATURDAY...Northwest winds 10 to 15 knots. Mostly cloudy with a
chance of showers and a slight chance of thunderstorms in the
morning, then partly cloudy in the afternoon. Waves 2 feet or
less.
.SATURDAY NIGHT...North winds 5 to 10 knots increasing to 10 to
15 knots after midnight. Partly cloudy. Waves 1 to 3 feet.
.SUNDAY...Northeast winds 10 to 15 knots. Mostly sunny in the
morning becoming partly cloudy. Waves 1 to 3 feet.

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

$$

LEZ444-190400-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
347 PM EDT Fri Apr 18 2025

.TONIGHT...Southwest winds 15 to 20 knots. Partly cloudy in the
evening, then mostly cloudy with a chance of showers and a slight
chance of thunderstorms after midnight. Waves 2 to 4 feet.
.SATURDAY...West winds 10 to 15 knots. Mostly cloudy. Light
showers likely and a slight chance of thunderstorms in the
morning, then a chance of showers in the afternoon. Waves 1 to
3 feet.
.SATURDAY NIGHT...Northwest winds 5 to 10 knots becoming
northeast 10 to 15 knots after midnight. Partly cloudy. Waves
2 feet or less.
.SUNDAY...East winds 10 to 15 knots. Partly cloudy. Waves 1 to
3 feet.

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

The water temperature at Belle Isle is 46 degrees.

$$

MV

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