Last Update: 503 PM EDT Mon May 18 2026

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Marquette, MI Local Forecast Office

3NM WNW Copper Harbor MI

Marine Zone Forecast

Late This Afternoon
North wind less than 10 knots. Cloudy. Patchy fog. Waves 2 to 3 feet subsiding to 1 to 2 feet.
Tonight
Northeast wind 10 to 15 knots veering east by midnight. Patchy fog through late evening. Areas of dense fog by midnight. Patchy fog late. Rain showers and a chance of thunderstorms. Waves building to 2 to 4 feet.
Tuesday
Northwest wind 15 to 20 knots. Cloudy. Patchy fog through mid morning. A chance of rain showers through mid morning, then a slight chance of rain showers by late morning. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
Tuesday Night
Northwest wind 10 to 20 knots. Partly cloudy. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
Wednesday
Northwest wind 5 to 15 knots backing west less than 10 knots in the afternoon. Sunny. Waves subsiding to 1 to 2 feet.



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503 PM EDT Mon May 18 2026
 
 

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