National Weather Service Marine Forecast FZUS53 KDTX

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.

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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.

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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.

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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.

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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.

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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.

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AM

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