


Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
041 FZUS53 KLOT 090954 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 454 AM CDT Fri May 9 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>742-091730- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 454 AM CDT Fri May 9 2025 .TODAY...Northeast winds 5 to 10 kt becoming east late in the afternoon. Sunny. Waves 2 to 4 ft subsiding to 1 to 2 ft. .TONIGHT...Southeast winds 5 to 10 kt becoming southwest overnight. Clear. Waves around 1 ft. .SATURDAY...West winds 5 to 10 kt early becoming north 10 to 20 kt in the late morning and increasing to 30 kt in the afternoon. Mostly sunny. Waves around 1 ft building to 3 to 6 ft occasionally to 8 ft. A small craft advisory will likely be needed. .SATURDAY NIGHT...North winds to 30 kt becoming northeast and diminishing to 10 to 15 kt. Clear. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. $$ LMZ743>745-091730- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 454 AM CDT Fri May 9 2025 .TODAY...Northeast winds 5 to 10 kt. Sunny. Waves 2 to 4 ft subsiding to 1 to 2 ft. .TONIGHT...Southeast winds 5 to 10 kt becoming southwest overnight. Clear. Waves 1 to 2 ft. .SATURDAY...West winds 10 to 15 kt becoming north 10 to 20 kt in the early afternoon and increasing to 30 kt in the late afternoon. Mostly sunny. Waves around 1 ft building to 3 to 5 ft late. A small craft advisory will likely be needed. .SATURDAY NIGHT...North winds to 30 kt becoming northeast and diminishing to 10 to 15 kt. Clear. Waves 4 to 6 ft occasionally to 8 ft. $$ Petr