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Detroit/Pontiac, MI Local Forecast Office

12NM N Port Sanilac MI

Marine Zone Forecast

Tonight

Southwest winds 5 to 10 knots becoming south 10 to 15 knots after midnight. Mostly cloudy in the evening becoming partly cloudy. Waves 2 feet or less.

Thursday

South winds 10 to 15 knots increasing to 15 to 20 knots early in the afternoon. Partly cloudy until late afternoon becoming mostly cloudy. Waves 1 to 3 feet building to 2 to 4 feet early in the afternoon.

Thursday Night

South winds 15 to 20 knots increasing to 20 to 25 knots with gusts to 35 knot gales in the late evening and overnight. Light showers. Waves 3 to 5 feet building to 6 to 9 feet in the late evening and overnight. Waves occasionally around 12 feet. A gale warning may be needed.

Friday

South winds 20 to 25 knots with gusts to 30 knots becoming west 15 to 20 knots in the late morning and afternoon. Mostly cloudy until late afternoon becoming partly cloudy. Light showers early in the morning, then a chance of showers in the late morning and early afternoon. Waves 6 to 9 feet subsiding to 1 to 3 feet. Waves occasionally around 12 feet.

wave heights are for ice free areas.

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