| NWS Forecast for: Winthrop Harbor to Wilmette Harbor IL (LMZ740) Issued by: National Weather Service Chicago, IL Last Update: 249 PM CST Mon Dec 1 2025 |  |
| Tonight: South winds 10 to 15 kt becoming west after midnight. snow in the evening, then intermittent flurries after midnight. waves 1 to 3 ft. Tuesday: Northwest winds 10 to 15 kt becoming west in the early afternoon and then southwest late. Mostly cloudy. Waves 1 to 2 ft. Tuesday Night: Southwest winds 15 to 20 kt increasing to 20 to 25 kt. Cloudy. Waves building to 2 to 4 ft. A small craft advisory will likely be needed. Wednesday: Southwest winds 20 to 25 kt becoming west 15 to 25 kt in the afternoon. Chance of snow showers in the morning, then snow showers likely in the afternoon. Waves 2 to 4 ft. | |
| Zone Forecast: Winthrop Harbor to Wilmette Harbor IL (LMZ740) | |
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