Coastal Waters Forecast for Wilmette Harbor to Northerly Island IL (LMZ741) (Text-Only)
NWS Forecast for: Wilmette Harbor to Northerly Island IL (LMZ741)
Issued by: National Weather Service Chicago, IL
Last Update: 926 AM CDT Mon Oct 12 2026




Today: Southwest winds 15 to 20 kt increasing to 20 to 25 kt. partly cloudy in the morning then clearing. Waves 1 to 3 ft building to 2 to 4 ft.

Tonight: Southwest winds 20 to 25 kt diminishing to 15 to 20 kt late. Mostly clear. Waves 2 to 4 ft.

Tuesday: West winds 15 to 20 kt diminishing to 10 to 15 kt in the afternoon. Mostly sunny. Waves 1 to 3 ft.

Tuesday Night: Northeast winds around 10 kt becoming north. Chance of showers and slight chance of thunderstorms in the evening, then showers likely and slight chance of thunderstorms overnight. Waves 1 to 2 ft.







Zone Forecast: Wilmette Harbor to Northerly Island IL (LMZ741)

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