| NWS Forecast for: Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake (LMZ777) Issued by: National Weather Service Chicago, IL Last Update: 808 AM CST Sun Jan 18 2026 |  |
Rest Of Today: West winds 10 to 20 kt becoming southwest 15 to 25 kt. Freezing spray. Slight chance of snow this morning, then chance of snow this afternoon. Waves 4 to 7 ft occasionally to 9 ft. Tonight: Southwest winds 15 to 25 kt becoming west to 30 kt late in the evening, then increasing to gales to 40 kt after midnight becoming northwest late. Freezing spray in the evening, then heavy freezing spray overnight. Snow. Waves 4 to 7 ft occasionally to 9 ft building to 12 to 16 ft occasionally to 21 ft. Monday: Northwest gales to 40 kt becoming west gales to 35 kt. Heavy freezing spray. Chance of snow. Waves 14 to 18 ft occasionally to 23 ft. Monday Night: West winds to 30 kt. Heavy freezing spray. Chance of snow. Waves 10 to 14 ft occasionally to 18 ft subsiding to 8 to 11 ft occasionally to 14 ft. Tuesday: West winds to 30 kt becoming southwest 15 to 25 kt. Heavy freezing spray in the morning, then freezing spray in the afternoon. Waves 6 to 9 ft occasionally to 12 ft. Tuesday Night: Southwest winds 15 to 25 kt increasing to 30 kt. Chance of snow. Waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft. Wednesday: West winds to 30 kt. Chance of snow. Waves 6 to 9 ft occasionally to 12 ft building to 7 to 10 ft occasionally to 13 ft. Thursday: West winds to 30 kt diminishing to 15 to 25 kt. Freezing spray. Chance of snow. Waves 8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft occasionally to 12 ft. | |
| Zone Forecast: Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake (LMZ777) | |
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