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Detroit/Pontiac, MI Local Forecast Office

16NM NE Port Sanilac MI

Marine Zone Forecast

Today

Southeast winds 10 to 15 knots increasing to 15 to 20 knots in the late morning and afternoon. Showers in the morning...then showers likely in the afternoon. Waves 3 to 5 feet building to 5 to 7 feet in the afternoon. Waves occasionally around 10 feet.

Tonight

South winds 15 to 20 knots becoming southwest 20 to 25 knots after midnight. Showers likely. Waves 5 to 7 feet. Waves occasionally around 10 feet.

Monday

Southwest winds 15 to 20 knots decreasing to 10 to 15 knots early in the afternoon. A chance of showers in the morning. Waves 4 to 6 feet.

Monday Night

North winds 5 to 10 knots veering to the east by midnight...then becoming south 10 to 15 knots after midnight. A chance of showers in the evening...then a chance of showers and thunderstorms after midnight. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. Waves occasionally around 8 feet.

Tuesday

South winds 15 to 20 knots becoming southwest 10 to 15 knots. A chance of thunderstorms in the morning. A chance of showers. Showers likely late in the evening. Waves 2 to 4 feet.

Wednesday

North winds 5 to 10 knots increasing to 10 to 15 knots in the late morning and early afternoon...then veering to the southeast . A chance of showers early in the morning. Showers likely . Waves 3 to 5 feet.

Thursday

South winds 15 to 20 knots becoming southwest 10 to 15 knots early in the evening...then becoming west 5 to 10 knots by midnight. A chance of showers. Waves 3 to 5 feet subsiding to 1 to 3 feet by midnight.