| NWS Forecast for: Winthrop Harbor to Wilmette Harbor IL (LMZ740) Issued by: National Weather Service Chicago, IL Last Update: 327 PM CDT Tue Aug 11 2026 |  |
Late This Afternoon: Southeast winds around 10 kt. Mostly cloudy. Waves 1 to 2 ft. Tonight: Southeast winds around 10 kt becoming around 5 kt. Slight chance of showers and thunderstorms. Waves 1 ft or less. Wednesday: South winds around 5 kt becoming southeast. Chance of showers and slight chance of thunderstorms. Waves 1 ft or less. Wednesday Night: East winds around 10 kt becoming around 5 kt. Slight chance of showers in the evening, then chance of showers overnight. Waves around 1 ft. Thursday: East winds around 10 kt becoming northeast in the afternoon. Showers likely in the morning, then showers likely and a chance of thunderstorms in the afternoon. 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 |