


Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
933 FZUS53 KLOT 050811 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 311 AM CDT Sun Oct 5 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>742-051515- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 311 AM CDT Sun Oct 5 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 11 AM CDT THIS MORNING THROUGH THIS EVENING... .TODAY...Southwest winds 10 to 15 kt increasing to 20 to 25 kt by late morning. Mostly sunny. Waves 1 to 2 ft building to 2 to 4 ft. .TONIGHT...Southwest winds 20 to 25 kt easing to 15 to 20 kt. Clear. Waves 2 to 4 ft. .MONDAY...Southwest winds 10 to 15 kt. Chance of showers and possibly a thunderstorm in the afternoon. Waves 1 to 3 ft. .MONDAY NIGHT...North winds 10 to 20 kt. Showers and a chance of thunderstorms. Waves 1 to 3 ft building to 2 to 4 ft. $$ LMZ743>745-051515- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 311 AM CDT Sun Oct 5 2025 .TODAY...South winds 10 to 15 kt increasing to 15 to 25 kt. Mostly sunny. Waves 1 to 3 ft. .TONIGHT...South winds 10 to 20 kt. Mostly clear. Waves 1 to 3 ft. .MONDAY...South winds 10 to 15 kt becoming southwest. Chance of showers and possibly a thunderstorm in the afternoon. Waves 1 to 2 ft. .MONDAY NIGHT...Southwest winds 10 to 15 kt shifting to north 10 to 20 kt. Showers and a chance of thunderstorms. Waves 1 to 2 ft building to 2 to 4 ft. $$ - Izzi