Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
339 FZUS53 KLOT 300914 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 314 AM CST Sun Nov 30 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>742-301615- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 314 AM CST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...West winds to 30 kt becoming northwest this morning, then diminishing to 15 to 25 kt this afternoon. Snow in the morning. Waves 4 to 7 ft occasionally to 9 ft. .TONIGHT...Northwest winds 15 to 25 kt diminishing to 10 to 15 kt. Partly cloudy. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. .MONDAY...West winds around 10 kt becoming southwest in the afternoon. Snow in the afternoon. Waves 1 to 3 ft. .MONDAY NIGHT...Southwest winds 10 to 15 kt becoming west overnight. Snow in the evening, then chance of snow overnight. Waves 1 to 2 ft. $$ LMZ743>745-301615- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 314 AM CST Sun Nov 30 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING... .TODAY...West winds to 30 kt becoming northwest this morning. Occasional gale force gusts to 35 kt this morning. Snow in the morning, then chance of snow in the afternoon. Waves 8 to 11 ft occasionally to 14 ft. .TONIGHT...Northwest winds 15 to 25 kt diminishing to 10 to 15 kt. Slight chance of snow in the evening. Waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 7 ft occasionally to 9 ft. .MONDAY...Southwest winds 10 to 15 kt becoming south in the afternoon. Snow in the afternoon. Waves 2 to 4 ft subsiding to 1 to 3 ft. .MONDAY NIGHT...South winds 10 to 15 kt becoming west overnight. Snow in the evening, then chance of snow overnight. Waves 1 to 3 ft. $$