Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
403 FZUS53 KLOT 140318 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 918 PM CST Thu Nov 13 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>742-141015- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 918 PM CST Thu Nov 13 2025 .REST OF TONIGHT...South winds 10 to 20 kt. Mostly cloudy late in the evening then clearing. Waves 1 to 2 ft. .FRIDAY...Southwest winds 10 to 15 kt becoming south. Sunny. Waves 1 to 2 ft. .FRIDAY NIGHT...South winds 10 to 15 kt increasing to 15 to 20 kt. Partly cloudy in the evening, then becoming mostly cloudy. Waves 1 to 2 ft building to 2 to 4 ft. .SATURDAY...Southwest winds 15 to 20 kt becoming west in the afternoon. Mostly cloudy in the morning, then becoming partly cloudy. Waves 2 to 4 ft. $$ LMZ743>745-141015- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 918 PM CST Thu Nov 13 2025 .REST OF TONIGHT...South winds 10 to 20 kt. Mostly cloudy late in the evening then clearing. Waves 1 to 2 ft. .FRIDAY...South winds 10 to 15 kt. Mostly sunny. Waves 1 to 2 ft. .FRIDAY NIGHT...South winds 10 to 15 kt increasing to 15 to 20 kt. Partly cloudy in the evening, then becoming mostly cloudy. Waves 1 to 3 ft. .SATURDAY...Southwest winds around 20 kt becoming west in the afternoon. Slight chance of rain in the afternoon. Waves 2 to 4 ft. $$