NWS Marine Forecast



 Hazardous marine condition(s):
 Small Craft Advisory
   LMZ740>743-060430-  Winthrop Harbor to Wilmette Harbor IL-  Wilmette Harbor to Northerly Island IL-  Northerly Island to Calumet Harbor IL-  Calumet Harbor IL to Gary IN-  400 PM CDT Sun Apr 5 2026    SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH  TUESDAY MORNING    LATE THIS AFTERNOON  West winds 15 to 25 kt. Mostly sunny.  Waves 1 to 3 ft.  TONIGHT  West winds 10 to 15 kt becoming northwest 15 to 20 kt  late. Rain showers likely after midnight. Waves 1 to 3 ft.  MONDAY  Northwest winds 15 to 20 kt increasing to 20 to 25 kt by  midday. Mostly cloudy. Waves 1 to 3 ft.  MONDAY NIGHT  North winds 15 to 25 kt. Slight chance of rain  and snow showers in the evening. Waves 3 to 5 ft building to 4 to  7 ft occasionally to 9 ft.  TUESDAY  Northeast winds 10 to 20 kt becoming east and  diminishing to around 10 kt in the afternoon. Mostly cloudy in  the morning then clearing. Waves 4 to 6 ft occasionally to 8 ft  subsiding to 3 to 5 ft.    $$