| NWS Forecast for: Northerly Island to Calumet Harbor IL (LMZ742) Issued by: National Weather Service Chicago, IL Last Update: 327 PM CST Wed Nov 12 2025 | |
Late This Afternoon: West winds to 30 kt. Sunny. Waves 2 to 4 ft. Tonight: West winds 20 to 25 kt becoming northwest 15 to 20 kt. Mostly clear. Waves 1 to 3 ft. Thursday: West winds 10 to 15 kt becoming southwest late. Mostly sunny in the morning, then becoming partly cloudy. Waves 1 to 2 ft. Thursday Night: Southwest winds around 10 kt becoming south. Mostly cloudy in the evening then clearing. Waves around 1 ft. Friday: South winds around 10 kt becoming southeast. Mostly sunny. Waves 1 to 2 ft. | |
| Zone Forecast: Northerly Island to Calumet Harbor IL (LMZ742) | |
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