| NWS Forecast for: Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake (LMZ777) Issued by: National Weather Service Chicago, IL Last Update: 315 AM CST Sat Mar 7 2026 |  |
Today: Southwest winds to 30 kt becoming west 15 to 25 kt early this afternoon, then diminishing to 10 to 20 kt late. Areas of dense fog this morning. Scattered rain showers with a chance of thunderstorms this morning, then scattered rain showers this afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft. Tonight: West winds 10 to 20 kt becoming southwest 15 to 25 kt. Waves 3 to 5 ft. Sunday: Southwest winds to 30 kt diminishing to 15 to 25 kt. Waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft. Sunday Night: Southwest winds to 30 kt. Waves 6 to 9 ft occasionally to 12 ft. Monday: Southwest winds to 30 kt diminishing to 15 to 25 kt. Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 7 ft occasionally to 9 ft. Monday Night: Northwest winds 10 to 20 kt veering to northeast. Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. Tuesday: Northeast winds 15 to 25 kt increasing to 30 kt. Chance of rain showers. Waves 4 to 7 ft occasionally to 9 ft building to 6 to 9 ft occasionally to 12 ft. Wednesday: North gales to 35 kt. Chance of rain and snow. Waves 12 to 16 ft occasionally to 21 ft. | |
| Zone Forecast: Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake (LMZ777) | |
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