| NWS Forecast for: Northerly Island to Calumet Harbor IL (LMZ742) Issued by: National Weather Service Chicago, IL Last Update: 315 PM CDT Sun Jun 14 2026 | |
| Late This Afternoon: Northwest winds 15 to 25 kt. Mostly cloudy. Waves 2 to 4 ft. Tonight: North winds 10 to 20 kt becoming west and diminishing to around 10 kt late. Mostly clear. Waves 2 to 4 ft subsiding to 1 to 2 ft. Monday: West winds 10 to 15 kt. Mostly sunny in the morning, then becoming partly cloudy. Waves 1 to 2 ft. Monday Night: Southwest winds 10 to 15 kt. Mostly cloudy in the evening, then becoming partly cloudy. Waves 1 to 2 ft. Tuesday: Southwest winds 15 to 25 kt. Chance of showers and slight chance of thunderstorms in the morning, then showers and a chance of thunderstorms in the afternoon. Waves 1 to 3 ft. | |
| Zone Forecast: Northerly Island to Calumet Harbor IL (LMZ742) | |
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