| NWS Forecast for: Winthrop Harbor to Wilmette Harbor IL (LMZ740) Issued by: National Weather Service Chicago, IL Last Update: 240 PM CDT Tue Oct 27 2026 |  |
| Tonight: Southeast winds around 10 kt becoming south. Partly cloudy. Waves 1 to 3 ft. Wednesday: South winds 10 to 15 kt. Sunny. Waves 1 to 2 ft. Wednesday Night: South winds 10 to 15 kt becoming southwest 15 to 20 kt. Slight chance of showers overnight. Waves 2 to 4 ft. Thursday: Southwest winds 10 to 15 kt becoming west in the afternoon. Chance of showers. Waves 1 to 3 ft. | |
| Zone Forecast: Winthrop Harbor to Wilmette Harbor IL (LMZ740) | |
Visit your local NWS office at: https://www.weather.gov/lot |