


Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
751 FZUS53 KLOT 050214 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 914 PM CDT Sat Oct 4 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>742-050915- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 914 PM CDT Sat Oct 4 2025 .REST OF TONIGHT...South winds 10 to 20 kt. Clear. Waves 1 to 3 ft. .SUNDAY...South winds 10 to 20 kt increasing to 15 to 25 kt in the afternoon. Mostly sunny. Waves 1 to 3 ft building to 2 to 4 ft. .SUNDAY NIGHT...South winds 10 to 20 kt becoming southwest. Mostly clear. Waves 2 to 4 ft. .MONDAY...Southwest winds 10 to 15 kt. Chance of showers and slight chance of thunderstorms in the afternoon. Waves 1 to 3 ft. $$ LMZ743>745-050915- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 914 PM CDT Sat Oct 4 2025 .REST OF TONIGHT...South winds 10 to 15 kt. Clear. Waves 1 to 2 ft. .SUNDAY AND SUNDAY NIGHT...South winds 10 to 20 kt. Mostly clear. Waves 1 to 3 ft. .MONDAY...Southwest winds 10 to 15 kt. Chance of showers and slight chance of thunderstorms in the afternoon. Waves 1 to 2 ft. $$ Ratzer