Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
164 FZUS53 KLOT 130311 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 911 PM CST Wed Nov 12 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>742-131015- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 911 PM CST Wed Nov 12 2025 .REST OF TONIGHT...West winds 15 to 25 kt becoming northwest 15 to 20 kt. Partly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft. .THURSDAY...West winds 10 to 15 kt becoming southwest late. Mostly sunny in the morning, then becoming partly cloudy. Waves 1 to 2 ft. .THURSDAY NIGHT...Southwest winds around 10 kt becoming south. Mostly cloudy in the evening then clearing. Waves around 1 ft. .FRIDAY...South winds around 10 kt becoming southeast. Mostly sunny. Waves 1 to 2 ft. $$ LMZ743>745-131015- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 911 PM CST Wed Nov 12 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM CST THURSDAY... .REST OF TONIGHT...West winds 20 to 25 kt becoming northwest 15 to 20 kt. Partly cloudy. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft late. .THURSDAY...Northwest winds 10 to 20 kt becoming southwest and diminishing to around 10 kt late. Mostly sunny in the morning, then becoming partly cloudy. Waves 3 to 5 ft subsiding to 1 to 2 ft. .THURSDAY NIGHT...South winds around 10 kt. Mostly cloudy in the evening then clearing. Waves 1 to 2 ft. .FRIDAY...South winds around 10 kt. Mostly sunny. Waves around 1 ft. $$