| NWS Forecast for: Winthrop Harbor to Wilmette Harbor IL (LMZ740) Issued by: National Weather Service Chicago, IL Last Update: 913 AM CDT Thu Apr 23 2026 | |
Rest Of Today: South winds 10 to 15 kt becoming southeast 15 to 25 kt this afternoon. Mostly sunny in the morning, then becoming partly cloudy. Waves 1 to 3 ft building to 2 to 4 ft in the afternoon. Tonight: South winds 15 to 25 kt. Showers likely and a chance of thunderstorms overnight. Waves 2 to 4 ft. Friday: South winds 15 to 20 kt becoming west 10 to 15 kt in the afternoon. Showers likely and slight chance of thunderstorms in the morning, then showers likely and a chance of thunderstorms in the afternoon. Waves 2 to 4 ft subsiding to 1 to 3 ft. Friday Night: Northwest winds 10 to 15 kt becoming north overnight. Partly cloudy. Waves 1 to 2 ft. | |
| Zone Forecast: Winthrop Harbor to Wilmette Harbor IL (LMZ740) | |
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