NWS Marine Forecast



 Hazardous marine condition(s):
 Hazardous Weather Outlook
   LMZ740>742-080330-  Winthrop Harbor to Wilmette Harbor IL-  Wilmette Harbor to Northerly Island IL-  Northerly Island to Calumet Harbor IL-  101 PM CDT Tue Apr 7 2026    LATE THIS AFTERNOON  East winds 10 to 15 kt. Mostly sunny.  Waves 2 to 4 ft.  TONIGHT  East winds 10 to 15 kt becoming southeast and  increasing to 15 to 25 kt overnight. Slight chance of rain and  snow showers overnight. Waves 1 to 3 ft building to 3 to 5 ft.  WEDNESDAY  South winds 20 to 25 kt increasing to 30 kt. Slight  chance of showers in the morning. Waves 4 to 6 ft occasionally to  8 ft.  WEDNESDAY NIGHT  South winds 20 to 25 kt becoming southwest.  Chance of showers in the evening, then showers likely and slight  chance of thunderstorms overnight. Waves 4 to 6 ft occasionally to  8 ft.  THURSDAY  West winds 10 to 20 kt becoming southwest and  diminishing to around 10 kt. Slight chance of showers. Waves 1 to  3 ft.    $$