| NWS Forecast for: Winthrop Harbor to Wilmette Harbor IL (LMZ740) Issued by: National Weather Service Chicago, IL Last Update: 304 PM CDT Thu Apr 30 2026 |  |
| Tonight: East winds 10 to 15 kt becoming north late. Scattered showers in the evening, then isolated showers after midnight. Waves 1 to 2 ft. Friday: North winds 10 to 15 kt becoming northeast in the afternoon. Isolated showers in the afternoon. Waves 1 to 3 ft. Friday Night: Northeast winds 5 to 10 kt becoming north overnight. Isolated showers in the evening. Waves 1 to 3 ft. Saturday: North winds 5 to 10 kt becoming northeast in the afternoon. Partly cloudy. Waves 1 to 2 ft. | |
| Zone Forecast: Winthrop Harbor to Wilmette Harbor IL (LMZ740) | |
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