Coastal Waters Forecast for Calumet Harbor IL to Gary IN (LMZ743) (Text-Only)
NWS Forecast for: Calumet Harbor IL to Gary IN (LMZ743)
Issued by: National Weather Service Chicago, IL
Last Update: 311 AM CDT Sun Oct 5 2025




Today: South winds 10 to 15 kt increasing to 15 to 25 kt. mostly sunny. Waves 1 to 3 ft.

Tonight: South winds 10 to 20 kt. Mostly clear. Waves 1 to 3 ft.

Monday: South winds 10 to 15 kt becoming southwest. Chance of showers and possibly a thunderstorm in the afternoon. Waves 1 to 2 ft.

Monday Night: Southwest winds 10 to 15 kt shifting to north 10 to 20 kt. Showers and a chance of thunderstorms. Waves 1 to 2 ft building to 2 to 4 ft.







Zone Forecast: Calumet Harbor IL to Gary IN (LMZ743)

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