| NWS Forecast for: Winthrop Harbor to Wilmette Harbor IL (LMZ740) Issued by: National Weather Service Chicago, IL Last Update: 908 PM CST Mon Feb 23 2026 | |
Rest Of Tonight: Variable winds 5 to 10 kt becoming south 10 to 15 kt late. Partly cloudy early, then becoming mostly cloudy. waves 3 to 5 ft subsiding to 1 to 3 ft. Tuesday: South winds 15 to 25 kt becoming southwest and increasing to 35 kt gales by late morning. Chance of a sprinkle or light rain shower in the afternoon. Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. Tuesday Night: West winds 20 to 25 kt diminishing to 15 to 20 kt overnight. Chance of a sprinkle or light rain shower in the early evening. Waves 2 to 4 ft. Wednesday: Northwest winds 15 to 20 kt becoming west 10 to 15 kt. Mostly sunny in the morning, then becoming partly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft. | |
| Zone Forecast: Winthrop Harbor to Wilmette Harbor IL (LMZ740) | |
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