NWS Marine Forecast



 Hazardous marine condition(s):
 Hazardous Weather Outlook
 Small Craft Advisory
   LMZ740>742-240345-  Winthrop Harbor to Wilmette Harbor IL-  Wilmette Harbor to Northerly Island IL-  Northerly Island to Calumet Harbor IL-  255 PM CDT Mon Jun 23 2025    SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING    TONIGHT  Southwest winds 20 to 25 kt diminishing to 10 to 20  kt. Slight chance of showers and thunderstorms toward midnight.  Waves 2 to 4 ft subsiding to 1 to 2 ft.  TUESDAY  Southwest winds 5 to 10 kt becoming east in the  afternoon. Slight chance of showers and thunderstorms in the  morning, then chance of showers and thunderstorms in the  afternoon. Waves around 1 ft.  TUESDAY NIGHT  Northeast winds 10 to 15 kt becoming north 5 to  10 kt. Chance of showers and thunderstorms in the evening, then  showers and thunderstorms likely overnight. Waves 1 to 2 ft.  WEDNESDAY  North winds 5 to 10 kt becoming northeast in the  afternoon. Showers likely and a chance of thunderstorms in the  morning, then chance of showers and thunderstorms in the  afternoon. Waves 1 to 2 ft.    $$