Winthrop Harbor To Wilmette Harbor-
Wilmette Harbor To Northerly Island-
Northerly Island To Calumet Harbor-
Northeast winds around 15 kt becoming east, then becoming southeast 10 to 20 kt after midnight. Chance of showers and thunderstorms. Waves 2 to 4 ft subsiding to 1 to 3 ft.
South winds 10 to 20 kt increasing to 15 to 25 kt in the afternoon. Chance of showers and thunderstorms through the day. Waves 1 to 3 ft.
Southwest winds to 30 kt. Slight chance of showers and thunderstorms after midnight. Waves 3 to 5 ft. A Small Craft Advisory will likely be needed.
West winds 20 to 25 kt becoming northwest in the afternoon. Slight chance of showers and thunderstorms in the morning. Waves 2 to 4 ft. A Small Craft Advisory will likely be needed.