| NWS Forecast for: Winthrop Harbor to Wilmette Harbor IL (LMZ740) Issued by: National Weather Service Chicago, IL Last Update: 227 AM CST Sat Nov 15 2025 |  |
Today: Southwest winds 15 to 25 kt becoming northwest 20 to 25 kt. Mostly cloudy in the morning, then becoming partly cloudy. waves 2 to 4 ft subsiding to 1 to 3 ft. Tonight: Northwest winds 20 to 25 kt increasing to 30 kt with occasional gales to 35 kt possible. Partly cloudy in the evening then clearing. Waves 2 to 4 ft building to 4 to 7 ft occasionally to 9 ft. Sunday: Northwest winds 20 to 25 kt diminishing to 15 to 20 kt. Sunny. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. Sunday Night: Northwest winds 15 to 20 kt diminishing to 10 to 15 kt. Clear. Waves 2 to 4 ft. | |
| Zone Forecast: Winthrop Harbor to Wilmette Harbor IL (LMZ740) | |
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