NWS Marine Forecast



 Hazardous marine condition(s):
 Hazardous Weather Outlook
 Small Craft Advisory
   LMZ740>742-162230-  Winthrop Harbor to Wilmette Harbor IL-  Wilmette Harbor to Northerly Island IL-  Northerly Island to Calumet Harbor IL-  936 AM CST Mon Feb 16 2026    SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM CST THIS EVENING    REST OF TODAY  Southwest winds 15 to 20 kt increasing to 20 to  25 kt with a few gusts to 30 kt this afternoon. Mostly cloudy  late in the morning then clearing. Waves 1 to 2 ft.  TONIGHT  Southwest winds 10 to 15 kt becoming southeast  overnight. Patchy fog overnight. Waves 1 to 2 ft.  TUESDAY  Southeast winds 10 to 20 kt. Patchy fog in the  morning. Waves 1 to 2 ft building to 2 to 4 ft.  TUESDAY NIGHT  Southeast winds 20 to 25 kt becoming south  overnight. Chance of showers in the evening, then showers likely  and slight chance of thunderstorms overnight. Waves 3 to 5 ft.    Wave heights are for ice free areas.    $$