| NWS Forecast for: Winthrop Harbor to Wilmette Harbor IL (LMZ740) Issued by: National Weather Service Chicago, IL Last Update: 858 PM CDT Thu Apr 16 2026 |  |
Rest Of Tonight: Northeast winds less than 10 kt becoming southeast late. Widespread dense fog. Waves 1 to 2 ft. Friday: Southeast winds 10 to 15 kt increasing to 15 to 25 kt. Widespread dense fog in the morning. Waves 1 to 2 ft building to 2 to 4 ft. Friday Night: South winds 15 to 20 kt becoming southwest overnight. Showers and thunderstorms. Waves 3 to 5 ft subsiding to 2 to 4 ft. Saturday: West winds 15 to 25 kt. Slight chance of showers in the morning. 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 |