Wilmette Harbor To Northerly Island-
Northerly Island To Calumet Harbor-
Northwest winds 5 to 10 kt becoming northeast in the afternoon. Partly sunny. Waves 1 ft or less.
East winds 10 to 15 kt becoming southeast 10 to 20 kt after midnight. Chance of showers and slight chance of thunderstorms after midnight. Waves 1 to 3 ft building to 2 to 4 ft after midnight.
Southeast winds to 30 kt becoming southwest in the afternoon. Rain showers and slight chance of thunderstorms. Waves 3 to 6 ft occasionally to 8 ft. A Small Craft Advisory will likely be needed.
Southwest winds to 30 kt. Slight chance of showers in the evening. Waves 1 to 3 ft building to 2 to 4 ft after midnight. A Small Craft Advisory will likely be needed.