NWS Marine Forecast



 Hazardous marine condition(s):
 Small Craft Advisory
 Hazardous Weather Outlook
   LMZ740>742-030915-  Winthrop Harbor to Wilmette Harbor IL-  Wilmette Harbor to Northerly Island IL-  Northerly Island to Calumet Harbor IL-  909 PM CDT Thu Apr 2 2026    SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT FRIDAY    REST OF TONIGHT  Southwest winds to 30 kt becoming west and  diminishing to 15 to 20 kt. Scattered showers and thunderstorms  late in the evening. Waves 4 to 6 ft occasionally to 8 ft  subsiding to 1 to 3 ft.  FRIDAY  West winds 10 to 15 kt becoming northeast in the  afternoon. Mostly cloudy. Waves 1 to 2 ft.  FRIDAY NIGHT  Northeast winds around 15 kt becoming east  overnight. Rain showers and a chance of thunderstorms. Waves 2 to  4 ft.  SATURDAY  Southwest winds 15 to 25 kt becoming west in the  afternoon. Showers likely in the morning, then chance of showers  in the afternoon. Waves 2 to 4 ft.    $$