NWS Marine Forecast



 Hazardous marine condition(s):
 Gale Watch
 Hazardous Weather Outlook
   LMZ740>743-180930-  Winthrop Harbor to Wilmette Harbor IL-  Wilmette Harbor to Northerly Island IL-  Northerly Island to Calumet Harbor IL-  Calumet Harbor IL to Gary IN-  932 PM CDT Fri Oct 17 2025    GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY  EVENING    REST OF TONIGHT  South winds 15 to 25 kt. Showers likely a  chance of thunderstorms late. Waves 2 to 4 ft.  SATURDAY  Southwest winds 15 to 20 kt. Showers likely and a  chance of thunderstorms in the morning, then chance of showers  and slight chance of thunderstorms in the afternoon. Waves 1 to 3  ft.  SATURDAY NIGHT  South winds 10 to 15 kt becoming west and  increasing to 20 to 25 kt overnight. Showers likely and a chance  of thunderstorms in the evening, then showers and slight chance of  thunderstorms overnight. Waves 1 to 2 ft building to 2 to 4 ft.  SUNDAY  Northwest gales to 35 kt. Showers likely in the  morning, then slight chance of showers in the afternoon. Waves  quickly building to 4 to 7 ft occasionally to 9 ft.    $$