| NWS Forecast for: Winthrop Harbor to Wilmette Harbor IL (LMZ740) Issued by: National Weather Service Chicago, IL Last Update: 245 PM CDT Tue Oct 20 2026 |  |
| Tonight: East winds around 10 kt becoming light and variable late in the evening. Mostly clear. Waves 1 ft or less. Wednesday: Light and variable winds becoming east around 10 kt in the afternoon. Mostly sunny. Waves 1 ft or less. Wednesday Night: Southeast winds less than 10 kt becoming light and variable in the evening. Mostly clear. Waves 1 ft or less. Thursday: Light and variable winds becoming northeast around 10 kt. Mostly sunny. Waves 1 ft or less. | |
| Zone Forecast: Winthrop Harbor to Wilmette Harbor IL (LMZ740) | |
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