625
FZUS53 KDLH 212009
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
309 PM CDT FRI AUG 21 2026
FOR WATERS WITHIN FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR.
WAVES ARE THE SIGNIFICANT WAVE HEIGHT - THE AVERAGE OF THE HIGHEST
1/3 OF THE WAVE SPECTRUM. OCCASIONAL WAVE HEIGHT IS THE AVERAGE OF
THE HIGHEST 1/10 OF THE WAVE SPECTRUM.
LSZ140-220400-
GRAND PORTAGE TO GRAND MARAIS MN-
309 PM CDT FRI AUG 21 2026
TONIGHT
WEST WIND 5 TO 10 KNOTS BECOMING NORTHWEST WITH GUSTS
TO AROUND 20 KNOTS AFTER MIDNIGHT. CHANCE OF RAIN SHOWERS EARLY
IN THE EVENING, THEN SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
LATE IN THE EVENING. CHANCE OF SPRINKLES AFTER MIDNIGHT. PATCHY
FOG AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS IN THE LATE MORNING AND AFTERNOON. MOSTLY
SUNNY. WAVES 1 TO 2 FEET.
SATURDAY NIGHT
NORTH WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS. MOSTLY CLEAR. WAVES 1 TO 2 FEET.
SUNDAY
NORTH WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND 20 KNOTS
BECOMING SOUTH WITH GUSTS TO AROUND 20 KNOTS IN THE AFTERNOON.
SUNNY. WAVES 1 TO 2 FEET.
LSZ141-220400-
GRAND MARAIS TO TACONITE HARBOR MN-
309 PM CDT FRI AUG 21 2026
TONIGHT
WEST WIND 5 KNOTS BECOMING NORTHWEST AFTER MIDNIGHT.
CHANCE OF RAIN SHOWERS EARLY IN THE EVENING, THEN SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS LATE IN THE EVENING. CHANCE OF
SPRINKLES AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
SATURDAY NIGHT
NORTH WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS
EARLY IN THE EVENING. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
SUNDAY
NORTH WIND 5 KNOTS BECOMING SOUTH IN THE AFTERNOON.
MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ142-220400-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
309 PM CDT FRI AUG 21 2026
TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST IN THE LATE
EVENING AND OVERNIGHT. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE EVENING. CHANCE OF SPRINKLES AFTER MIDNIGHT. WAVES 1 FOOT
OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
SATURDAY NIGHT
NORTH WIND 5 KNOTS. PARTLY CLOUDY. WAVES 1 FOOT
OR LESS.
SUNDAY
NORTH WIND 5 KNOTS EARLY IN THE MORNING BECOMING
VARIABLE 10 KNOTS OR LESS, THEN BECOMING SOUTHEAST 5 KNOTS IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ143-220400-
SILVER BAY HARBOR TO TWO HARBORS MN-
309 PM CDT FRI AUG 21 2026
TONIGHT
WEST WIND 5 KNOTS BECOMING NORTHWEST IN THE LATE
EVENING AND OVERNIGHT. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS IN THE EVENING, THEN CHANCE OF SPRINKLES AFTER
MIDNIGHT. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR
LESS.
SATURDAY NIGHT
NORTH WIND 5 KNOTS. PARTLY CLOUDY. WAVES 1 FOOT
OR LESS.
SUNDAY
NORTH WIND 5 KNOTS EARLY IN THE MORNING BECOMING
NORTHEAST, THEN BECOMING SOUTHEAST EARLY IN THE AFTERNOON
BECOMING VARIABLE 10 KNOTS OR LESS. SUNNY. WAVES 1 FOOT OR LESS.
LSZ144-220400-
TWO HARBORS TO DULUTH MN-
309 PM CDT FRI AUG 21 2026
TONIGHT
NORTHWEST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN CHANCE OF
SPRINKLES AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE LATE MORNING AND AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
SATURDAY NIGHT
NORTH WIND 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES
1 FOOT OR LESS.
SUNDAY
NORTH WIND 5 KNOTS BECOMING EAST IN THE LATE MORNING
AND AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ145-220400-
DULUTH MN TO PORT WING WI-
309 PM CDT FRI AUG 21 2026
TONIGHT
WEST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN CHANCE OF
SPRINKLES AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE LATE MORNING AND AFTERNOON. SUNNY. WAVES 1 TO 2 FEET.
SATURDAY NIGHT
NORTH WIND 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES
1 FOOT OR LESS.
SUNDAY
NORTH WIND 5 KNOTS BECOMING NORTHEAST IN THE AFTERNOON.
SUNNY. WAVES 1 FOOT OR LESS.
LSZ146-220400-
PORT WING TO SAND ISLAND WI-
309 PM CDT FRI AUG 21 2026
TONIGHT
WEST WIND 5 KNOTS RISING TO 5 TO 10 KNOTS AFTER
MIDNIGHT. SLIGHT CHANCE OF SHOWERS EARLY IN THE EVENING, THEN
CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS LATE IN THE
EVENING. CHANCE OF SPRINKLES AFTER MIDNIGHT. WAVES 1 FOOT OR
LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR
LESS.
SATURDAY NIGHT
NORTH WIND 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES
1 FOOT OR LESS.
SUNDAY
NORTHEAST WIND 5 KNOTS UNTIL LATE AFTERNOON BECOMING
VARIABLE 10 KNOTS OR LESS. SUNNY. WAVES 1 FOOT OR LESS.
LSZ147-220400-
SAND ISLAND TO BAYFIELD WI-
309 PM CDT FRI AUG 21 2026
TONIGHT
WEST WIND 5 KNOTS BECOMING NORTHWEST AFTER MIDNIGHT.
CHANCE OF SPRINKLES THROUGH THE NIGHT. SLIGHT CHANCE OF
THUNDERSTORMS LATE IN THE EVENING. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE LATE MORNING AND EARLY AFTERNOON. SUNNY. WAVES 1 FOOT OR
LESS.
SATURDAY NIGHT
NORTH WIND 5 TO 10 KNOTS. PARTLY CLOUDY. WAVES
1 FOOT OR LESS.
SUNDAY
NORTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTHEAST LATE IN
THE AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ150-220400-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
309 PM CDT FRI AUG 21 2026
TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST AFTER
MIDNIGHT. CHANCE OF SPRINKLES IN THE EVENING. SLIGHT CHANCE OF
THUNDERSTORMS THROUGH THE NIGHT. CHANCE OF SHOWERS AFTER
MIDNIGHT. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS
UNTIL LATE AFTERNOON. SUNNY. WAVES 1 TO 2 FEET.
SATURDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS BECOMING NORTH
AFTER MIDNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
SUNDAY
NORTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTHEAST LATE IN
THE AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ121-220400-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
309 PM CDT FRI AUG 21 2026
TONIGHT
WEST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS IN THE
EVENING. SLIGHT CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. CHANCE
OF SPRINKLES AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE LATE MORNING AND EARLY AFTERNOON. SUNNY. WAVES 1 FOOT OR
LESS.
SATURDAY NIGHT
NORTH WIND 5 TO 10 KNOTS. PARTLY CLOUDY. WAVES
1 FOOT OR LESS.
SUNDAY
NORTH WIND 5 KNOTS BECOMING NORTHEAST IN THE AFTERNOON.
SUNNY. WAVES 1 FOOT OR LESS.
LSZ148-220400-
OAK POINT TO SAXON HARBOR WI-
309 PM CDT FRI AUG 21 2026
TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING WEST AFTER MIDNIGHT.
CHANCE OF SPRINKLES IN THE EVENING. SLIGHT CHANCE OF
THUNDERSTORMS THROUGH THE NIGHT. CHANCE OF RAIN SHOWERS AFTER
MIDNIGHT. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS
UNTIL LATE AFTERNOON. SUNNY. WAVES 1 TO 2 FEET.
SATURDAY NIGHT
NORTH WIND 5 TO 10 KNOTS. PARTLY CLOUDY. WAVES
1 FOOT OR LESS.
SUNDAY
NORTH WIND 5 TO 10 KNOTS BECOMING NORTHEAST IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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