| NWS Forecast for: Wilmette Harbor to Northerly Island IL (LMZ741) Issued by: National Weather Service Chicago, IL Last Update: 258 PM CDT Thu Oct 15 2026 |  |
Late This Afternoon: Southeast winds 10 to 20 kt. Showers. waves 3 to 5 ft. Tonight: South winds 10 to 20 kt becoming west and increasing to 15 to 25 kt later this evening, then to increasing to 30 kt overnight. A few gale force gusts to 35 kt possible late. Showers in the evening. Waves 3 to 5 ft. Friday: Northwest winds to 30 kt becoming north and increasing to 40 kt gales in the afternoon. Slight chance of waterspouts in the afternoon. Showers likely in the afternoon. Waves 4 to 6 ft occasionally to 8 ft building to 8 to 12 ft occasionally to 16 ft. Friday Night: North gales to 40 kt diminishing to 30 kt. Slight chance of waterspouts in the evening. Chance of showers in the evening. Waves 10 to 14 ft occasionally to 18 ft subsiding to 8 to 12 ft occasionally to 16 ft. Saturday: Northwest winds 10 to 20 kt becoming southwest and diminishing to around 10 kt in the afternoon. Partly cloudy in the morning, then becoming sunny. Waves 5 to 8 ft occasionally to 10 ft subsiding to 2 to 4 ft. | |
| Zone Forecast: Wilmette Harbor to Northerly Island IL (LMZ741) | |
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