390
FZUS53 KLOT 230801
NSHLOT
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
301 AM CDT SUN AUG 23 2026
FOR WATERS WITHIN FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN
WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS, WHICH
IS THE AVERAGE OF THE HIGHEST 1/3 OF THE WAVES, ALONG WITH THE
AVERAGE HEIGHT OF THE HIGHEST 10 PERCENT OF THE WAVES WHICH WILL
OCCASIONALLY BE ENCOUNTERED.
LMZ740-231530-
WINTHROP HARBOR TO WILMETTE HARBOR IL-
301 AM CDT SUN AUG 23 2026
TODAY
NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH IN THE
AFTERNOON. SUNNY IN THE MORNING, THEN BECOMING PARTLY CLOUDY.
WAVES 1 TO 3 FT BUILDING TO 2 TO 4 FT.
TONIGHT
NORTH WINDS 10 TO 15 KT BECOMING NORTHWEST 5 TO 10 KT.
PARTLY CLOUDY IN THE EVENING, THEN BECOMING MOSTLY CLEAR. WAVES 2
TO 4 FT SUBSIDING TO 1 TO 3 FT.
MONDAY
NORTHWEST WINDS 5 TO 10 KT BECOMING NORTHEAST IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 3 FT.
MONDAY NIGHT
SOUTHEAST WINDS AROUND 5 KT BECOMING SOUTHWEST
OVERNIGHT. MOSTLY CLEAR. WAVES 1 TO 2 FT.
LMZ741-742-231530-
WILMETTE HARBOR TO NORTHERLY ISLAND IL-
NORTHERLY ISLAND TO CALUMET HARBOR IL-
301 AM CDT SUN AUG 23 2026
TODAY
NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH IN THE
AFTERNOON. SUNNY IN THE MORNING, THEN BECOMING PARTLY CLOUDY.
WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT.
TONIGHT
NORTH WINDS 10 TO 15 KT BECOMING NORTHWEST OVERNIGHT.
PARTLY CLOUDY IN THE EVENING, THEN BECOMING CLEAR. WAVES 3 TO 5
FT SUBSIDING 2 TO 4 FT.
MONDAY
WEST WINDS 5 TO 10 KT BECOMING NORTHEAST IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 3 FT.
MONDAY NIGHT
EAST WINDS 5 TO 10 KT BECOMING SOUTHWEST
OVERNIGHT. PARTLY CLOUDY IN THE EVENING, THEN BECOMING MOSTLY
CLEAR. WAVES 1 TO 2 FT.
LMZ743>745-231530-
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-
BURNS HARBOR TO MICHIGAN CITY IN-
301 AM CDT SUN AUG 23 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
TODAY
NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH AND INCREASING
TO 15 TO 20 KT IN THE AFTERNOON. MOSTLY SUNNY IN THE MORNING,
THEN BECOMING PARTLY CLOUDY. WAVES 2 TO 4 FT BUILDING TO 4 TO 6
FT OCCASIONALLY TO 8 FT.
TONIGHT
NORTH WINDS 10 TO 15 KT BECOMING NORTHWEST OVERNIGHT.
PARTLY CLOUDY IN THE EVENING, THEN BECOMING MOSTLY CLEAR. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
MONDAY
WEST WINDS 5 TO 10 KT BECOMING NORTH IN THE AFTERNOON.
MOSTLY SUNNY. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
MONDAY NIGHT
EAST WINDS AROUND 10 KT BECOMING SOUTH OVERNIGHT.
MOSTLY CLEAR. WAVES 1 TO 2 FT.
YACK
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