Last Update: 352 PM EDT Wed Jul 30 2025

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Detroit/Pontiac, MI Local Forecast Office

12NM N Port Sanilac MI

Marine Zone Forecast

Tonight
North winds 15 to 20 knots becoming northeast 10 to 15 knots after midnight. Cloudy. A chance of showers in the evening, then a slight chance of showers after midnight. Waves 2 to 4 feet.
Thursday
Northeast winds 15 to 20 knots increasing to 20 to 25 knots early in the afternoon. Mostly cloudy with a slight chance of showers early in the morning, then mostly sunny in the late morning and afternoon. Waves 2 to 4 feet building to 3 to 5 feet in the late morning and afternoon. Waves occasionally around 7 feet.
Thursday Night
Northeast winds 20 to 25 knots diminishing to 10 to 15 knots. Clear. Waves 3 to 5 feet. Waves occasionally around 7 feet.
Friday
Northeast winds 10 to 15 knots becoming north 15 to 20 knots early in the afternoon. Sunny. Waves 1 to 3 feet.

see lake huron open lake forecast for days 3 through 5.



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352 PM EDT Wed Jul 30 2025
 
 

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