310
FZUS53 KDTX 171333
NSHDTX

Nearshore Marine Forecast for Michigan
National Weather Service Detroit/Pontiac MI
933 AM EDT Thu Jul 17 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.

LHZ422-172145-
Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
933 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON...

.REST OF TODAY...Northwest winds 20 to 25 knots diminishing to
10 to 15 knots. Mostly cloudy late in the morning becoming partly
cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet in the
afternoon.
.TONIGHT...North winds 10 to 15 knots becoming northeast 5 to
10 knots after midnight. Partly cloudy in the evening then
clearing. Waves 1 to 3 feet.
.FRIDAY...East winds 5 to 10 knots. Sunny. Waves 2 feet or less.
.FRIDAY NIGHT...East winds 5 to 10 knots becoming south 10 to
15 knots in the late evening and overnight. Mostly clear. A
chance of showers after midnight. Waves 2 feet or less.

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

$$

LHZ421-172145-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-
933 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.REST OF TODAY...Northwest winds 20 to 25 knots diminishing to
15 to 20 knots in the afternoon. Mostly cloudy. A slight chance
of showers late in the morning. Waves 3 to 5 feet. Waves
occasionally around 7 feet.
.TONIGHT...North winds 15 to 20 knots diminishing to 5 to
10 knots. Partly cloudy in the evening then clearing. Waves 3 to
5 feet subsiding to 1 to 3 feet after midnight. Waves
occasionally around 7 feet.
.FRIDAY...Northeast winds 5 to 10 knots veering to the east in
the late morning and afternoon. Sunny. Waves 2 feet or less.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots becoming south
10 to 15 knots in the late evening and overnight. Mostly clear. A
chance of showers after midnight. Waves 2 feet or less.

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

$$

LHZ441-172145-
Port Austin to Harbor Beach MI-
933 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.REST OF TODAY...Northwest winds 15 to 20 knots. Mostly cloudy. A
slight chance of showers late in the morning. Waves 3 to 5 feet.
Waves occasionally around 6 feet.
.TONIGHT...North winds 15 to 20 knots diminishing to 10 to
15 knots in the late evening and overnight. Partly cloudy in the
evening then clearing. Waves 4 to 6 feet subsiding to 2 to 4 feet
after midnight. Waves occasionally around 8 feet.
.FRIDAY...East winds 5 to 10 knots veering to the southeast early
in the afternoon. Sunny. Waves 2 feet or less.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots. Mostly clear. A
chance of showers after midnight. Waves 2 feet or less.

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

$$

LHZ442-172145-
Harbor Beach to Port Sanilac MI-
933 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.REST OF TODAY...Northwest winds 15 to 20 knots. Mostly cloudy
with a slight chance of showers. Waves 2 to 4 feet building to
3 to 5 feet in the afternoon. Waves occasionally around 7 feet.
.TONIGHT...North winds 15 to 20 knots diminishing to 10 to
15 knots in the late evening and overnight. Partly cloudy. Waves
3 to 5 feet. Waves occasionally around 7 feet.
.FRIDAY...East winds 5 to 10 knots. Sunny. Waves 1 to 3 feet.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots veering to the
south after midnight. Mostly clear. Waves 2 feet or less.

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

$$

LHZ443-172145-
Port Sanilac to Port Huron MI-
933 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.REST OF TODAY...Northwest winds 15 to 20 knots. Mostly cloudy
with a slight chance of showers. Waves 1 to 3 feet building to
2 to 4 feet late in the afternoon.
.TONIGHT...North winds 15 to 20 knots becoming northeast 10 to
15 knots after midnight. Mostly cloudy in the evening becoming
mostly clear. Waves 2 to 4 feet.
.FRIDAY...East winds 5 to 10 knots. Sunny. Waves 1 to 3 feet.
.FRIDAY NIGHT...East winds 5 to 10 knots veering to the southeast
in the late evening and overnight. Mostly clear. Waves 2 feet or
less.

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

$$

LEZ444-172145-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
933 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY...

.REST OF TODAY...West winds 20 to 25 knots becoming northwest
10 to 15 knots. Partly cloudy late in the morning then clearing.
Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon.
.TONIGHT...North winds 10 to 15 knots veering to the northeast
after midnight. Partly cloudy. Waves 2 feet or less.
.FRIDAY...Northeast winds 10 to 15 knots becoming east 5 to
10 knots in the late morning and afternoon. Partly cloudy in the
morning then clearing. Waves 2 feet or less.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots. Partly cloudy. A
chance of showers after midnight. Waves 2 feet or less.

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

The water temperature at Belle Isle is 77 degrees.

$$

AM

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