| NWS Forecast for: Winthrop Harbor to Wilmette Harbor IL (LMZ740) Issued by: National Weather Service Chicago, IL Last Update: 246 PM CDT Tue Jul 15 2025 |  |
| Tonight: Southeast winds 10 to 15 kt becoming south late. Slight chance of showers. Waves 1 to 2 ft. Wednesday: Southeast winds 10 to 15 kt becoming southwest 15 to 20 kt in the late afternoon. Chance of showers and thunderstorms in the afternoon. Waves 1 to 2 ft. Wednesday Night: Southwest winds 10 to 20 kt becoming northwest overnight. Showers and thunderstorms likely in the evening, then chance of showers and slight chance of thunderstorms overnight. Waves 1 to 3 ft. Thursday: Northwest winds 10 to 20 kt becoming north 15 to 25 kt. Slight chance of showers and thunderstorms. Waves 1 to 3 ft building to 4 to 6 ft occasionally to 8 ft. A small craft advisory will likely be needed. | |
| Zone Forecast: Winthrop Harbor to Wilmette Harbor IL (LMZ740) | |
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