| NWS Forecast for: Winthrop Harbor to Wilmette Harbor IL (LMZ740) Issued by: National Weather Service Chicago, IL Last Update: 303 AM CDT Mon Jun 15 2026 | |
| Today: West winds 10 to 20 kt becoming southwest. Mostly sunny in the morning, then becoming partly cloudy. Waves 1 to 2 ft. Tonight: Southwest winds 10 to 15 kt. Partly cloudy. Waves 1 to 2 ft. Tuesday: Southwest winds 15 to 25 kt. Chance of showers and thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. Waves 2 to 4 ft. Tuesday Night: West winds 10 to 20 kt. Chance of showers and slight chance of thunderstorms in the evening. Waves 1 to 2 ft. | |
| Zone Forecast: Winthrop Harbor to Wilmette Harbor IL (LMZ740) | |
Visit your local NWS office at: https://www.weather.gov/lot |