NWS Marine Forecast



 Hazardous marine condition(s):
 Small Craft Advisory
   LMZ740>742-030945-  Winthrop Harbor to Wilmette Harbor IL-  Wilmette Harbor to Northerly Island IL-  Northerly Island to Calumet Harbor IL-  901 PM CDT Sat May 2 2026    SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM CDT SUNDAY THROUGH  SUNDAY EVENING    REST OF TONIGHT  South winds 10 to 15 kt becoming southwest  15 to 20 kt late. Partly cloudy. Waves 1 to 3 ft.  SUNDAY  Southwest winds 15 to 25 kt increasing to 30 kt. Chance  of showers. Waves 1 to 3 ft building to 2 to 4 ft.  SUNDAY NIGHT  Southwest winds 10 to 20 kt diminishing to around  10 kt. Partly cloudy in the evening, then becoming mostly clear.  Waves 1 to 2 ft.  MONDAY  Southwest winds 10 to 20 kt. Mostly sunny. Waves 1 to  3 ft.    $$