| NWS Forecast for: Wilmette Harbor to Northerly Island IL (LMZ741) Issued by: National Weather Service Chicago, IL Last Update: 346 PM CDT Mon May 18 2026 |  |
Tonight: Southwest winds 15 to 25 kt becoming south. Chance of showers and slight chance of thunderstorms after midnight. Waves 2 to 4 ft. Tuesday: Southwest winds 15 to 25 kt becoming west in the afternoon. Chance of showers and slight chance of thunderstorms in the morning, then chance of showers and thunderstorms in the afternoon. Waves 3 to 5 ft subsiding to 2 to 4 ft. Tuesday Night: Northwest winds 15 to 20 kt becoming north. Slight chance of showers and thunderstorms in the evening. Waves 1 to 3 ft building to 2 to 4 ft. Wednesday: North winds 15 to 20 kt becoming northeast. Partly cloudy. Waves 2 to 4 ft building to 3 to 5 ft. | |
| Zone Forecast: Wilmette Harbor to Northerly Island IL (LMZ741) | |
Visit your local NWS office at: https://www.weather.gov/lot |