424
FZUS53 KDTX 041958
NSHDTX

Nearshore Marine Forecast for Michigan
National Weather Service Detroit/Pontiac MI
358 PM EDT Thu Sep 4 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.

LHZ422-050400-
Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
358 PM EDT Thu Sep 4 2025

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...

.TONIGHT...Southwest winds 15 to 20 knots becoming south 10 to
15 knots after midnight, then increasing to 20 to 25 knots early
in the morning. Partly cloudy. A chance of showers after
midnight. Waves 1 to 3 feet building to 2 to 4 feet early in the
morning.
.FRIDAY...Southwest winds to 30 knots veering to the west early
in the afternoon. Gusts to 40 knot gales. Mostly cloudy early in
the morning becoming partly cloudy. A chance of showers early in
the morning. Waves 4 to 6 feet. Waves occasionally around 7 feet.
.FRIDAY NIGHT...West winds 20 to 25 knots with gusts to 30 knots
becoming southwest 15 to 20 knots after midnight. Mostly clear.
Waves 2 to 4 feet.
.SATURDAY...West winds 15 to 20 knots. Mostly sunny until late
afternoon becoming partly cloudy. Waves 1 to 3 feet.

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

$$

LHZ421-050400-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-
358 PM EDT Thu Sep 4 2025

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...

.TONIGHT...West winds 15 to 20 knots becoming southwest 10 to
15 knots after midnight, then becoming south 20 to 25 knots early
in the morning. Partly cloudy. A chance of showers after
midnight. Waves 1 to 3 feet building to 3 to 5 feet early in the
morning. Waves occasionally around 7 feet.
.FRIDAY...South winds to 30 knots becoming southwest gales to
35 knot gales in the late morning and early afternoon, then
becoming west to 30 knots early in the afternoon. Gusts to
40 knot gales. Mostly cloudy early in the morning becoming partly
cloudy. A chance of showers early in the morning, then a slight
chance of showers in the late morning and early afternoon. Waves
6 to 9 feet. Waves occasionally around 12 feet.
.FRIDAY NIGHT...West winds 20 to 25 knots with gusts to 30 knots
diminishing to 15 to 20 knots after midnight. Mostly clear. Waves
4 to 6 feet. Waves occasionally around 7 feet.
.SATURDAY...West winds 15 to 20 knots. Mostly sunny until late
afternoon becoming partly cloudy. Waves 3 to 5 feet. Waves
occasionally around 7 feet.

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

$$

LHZ441-050400-
Port Austin to Harbor Beach MI-
358 PM EDT Thu Sep 4 2025

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...

.TONIGHT...Southwest winds 10 to 15 knots becoming south 15 to
20 knots early in the morning. Partly cloudy. A chance of showers
after midnight. Waves 1 to 3 feet.
.FRIDAY...Southwest winds to 30 knots veering to the west early
in the afternoon. Gusts to 40 knot gales. Mostly cloudy early in
the morning becoming partly cloudy. A slight chance of showers
until late afternoon. Waves 5 to 7 feet building to 6 to 9 feet
early in the afternoon. Waves occasionally around 12 feet.
.FRIDAY NIGHT...West winds 20 to 25 knots with gusts to 30 knots
diminishing to 15 to 20 knots after midnight. Partly cloudy.
Waves 4 to 6 feet. Waves occasionally around 8 feet.
.SATURDAY...West winds 15 to 20 knots. Mostly sunny until late
afternoon becoming partly cloudy. Waves 2 to 4 feet.

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

$$

LHZ442-050400-
Harbor Beach to Port Sanilac MI-
358 PM EDT Thu Sep 4 2025

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...

.TONIGHT...Southwest winds 10 to 15 knots becoming south 15 to
20 knots early in the morning. Mostly clear. Waves 1 to 3 feet.
.FRIDAY...South winds to 30 knots becoming west 20 to 25 knots
early in the afternoon. Gusts to 35 knot gales. Mostly cloudy
early in the morning becoming partly cloudy. A slight chance of
showers until late afternoon. Waves 4 to 6 feet. Waves
occasionally around 7 feet.
.FRIDAY NIGHT...West winds 20 to 25 knots with gusts to 30 knots
becoming southwest 10 to 15 knots. Partly cloudy. Waves 2 to
4 feet subsiding to 1 to 3 feet in the late evening and
overnight.
.SATURDAY...West winds 10 to 15 knots. Mostly sunny until late
afternoon becoming partly cloudy. Waves 2 feet or less.

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

$$

LHZ443-050400-
Port Sanilac to Port Huron MI-
358 PM EDT Thu Sep 4 2025

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...

.TONIGHT...Southwest winds 5 to 10 knots becoming south 15 to
20 knots early in the morning. Mostly clear. Waves 2 feet or
less.
.FRIDAY...South winds 20 to 25 knots veering to the west early in
the afternoon. Gusts to 35 knot gales. Partly cloudy with a
slight chance of showers until late afternoon, then partly cloudy
early in the afternoon. Waves 4 to 6 feet. Waves occasionally
around 8 feet.
.FRIDAY NIGHT...West winds 20 to 25 knots diminishing to 10 to
15 knots. Partly cloudy. Waves 2 to 4 feet subsiding to 1 to
3 feet in the late evening and overnight.
.SATURDAY...West winds 10 to 15 knots. Mostly sunny until late
afternoon becoming partly cloudy. Waves 2 feet or less.

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

$$

LEZ444-050400-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
358 PM EDT Thu Sep 4 2025

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

.TONIGHT...West winds 5 to 10 knots becoming south 15 to 20 knots
early in the morning. Mostly clear. Waves 2 feet or less.
.FRIDAY...Southwest winds 20 to 25 knots veering to the west
early in the afternoon. Gusts to 30 knots. Mostly sunny until
late afternoon becoming partly cloudy. Waves 3 to 5 feet. Waves
occasionally around 7 feet.
.FRIDAY NIGHT...West winds 15 to 20 knots diminishing to 5 to
10 knots. Partly cloudy. Waves 1 to 3 feet.
.SATURDAY...West winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and afternoon. Partly cloudy becoming mostly
sunny in the late morning and early afternoon 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 70 degrees.

$$

BT

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