Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
413 FZUS53 KLOT 020916 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 316 AM CST Tue Dec 2 2025 For waters within five nautical miles of shore on Lake Michigan Waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the waves, along with the average height of the highest 10 percent of the waves which will occasionally be encountered. LMZ740>742-021615- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 316 AM CST Tue Dec 2 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY MORNING... .TODAY...Northwest winds 10 to 15 kt becoming southwest in the afternoon. Mostly cloudy. Waves 1 to 3 ft. .TONIGHT...Southwest winds 10 to 20 kt increasing to 20 to 25 kt. Mostly cloudy. Waves 1 to 3 ft building to 2 to 4 ft. .WEDNESDAY...Southwest winds 20 to 25 kt becoming northwest in the afternoon. Chance of snow in the morning, then snow likely in the afternoon. Waves 2 to 4 ft. .WEDNESDAY NIGHT...Northwest winds 20 to 25 kt. Chance of snow in the evening. Waves 4 to 6 ft occasionally to 8 ft. $$ LMZ743>745-021615- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 316 AM CST Tue Dec 2 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY AFTERNOON... .TODAY...Northwest winds 10 to 15 kt becoming southwest in the afternoon. Mostly cloudy. Waves 1 to 3 ft. .TONIGHT...Southwest winds 10 to 20 kt increasing to 20 to 25 kt. Mostly cloudy. Waves 1 to 3 ft building to 2 to 4 ft. .WEDNESDAY...Southwest winds 20 to 25 kt becoming northwest in the afternoon. Slight chance of snow in the morning, then snow likely in the afternoon. Waves 3 to 5 ft. .WEDNESDAY NIGHT...Northwest winds to 30 kt. Chance of snow in the evening. Waves building to 6 to 9 ft occasionally to 12 ft. $$