721
FZUS53 KDLH 220021
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
721 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.
LSZ140-221000-
GRAND PORTAGE TO GRAND MARAIS MN-
721 PM CDT FRI AUG 21 2026
REST OF TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING
NORTHWEST AFTER MIDNIGHT. CHANCE OF RAIN SHOWERS EARLY IN THE
EVENING, THEN SLIGHT CHANCE OF RAIN SHOWERS LATE IN THE EVENING.
CHANCE OF SPRINKLES AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS
LATE IN THE MORNING. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
SATURDAY NIGHT
NORTH WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
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 FOOT OR LESS.
LSZ141-221000-
GRAND MARAIS TO TACONITE HARBOR MN-
721 PM CDT FRI AUG 21 2026
REST OF 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. MOSTLY 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 SOUTH IN THE AFTERNOON.
MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ142-221000-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
721 PM CDT FRI AUG 21 2026
REST OF TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST IN
THE LATE EVENING AND OVERNIGHT. SLIGHT CHANCE OF RAIN SHOWERS IN
THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS LATE IN THE EVENING,
THEN 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.
LSZ143-221000-
SILVER BAY HARBOR TO TWO HARBORS MN-
721 PM CDT FRI AUG 21 2026
REST OF TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST IN
THE LATE EVENING AND OVERNIGHT. SLIGHT CHANCE OF RAIN SHOWERS IN
THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS LATE 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.
LSZ144-221000-
TWO HARBORS TO DULUTH MN-
721 PM CDT FRI AUG 21 2026
REST OF TONIGHT
WEST WIND 5 KNOTS BECOMING NORTHWEST AFTER
MIDNIGHT. SLIGHT CHANCE OF RAIN SHOWERS IN THE EVENING. SLIGHT
CHANCE OF THUNDERSTORMS LATE IN THE EVENING, THEN 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. 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.
LSZ145-221000-
DULUTH MN TO PORT WING WI-
721 PM CDT FRI AUG 21 2026
REST OF TONIGHT
WEST WIND 5 KNOTS BECOMING NORTHWEST AFTER
MIDNIGHT. SLIGHT CHANCE OF RAIN SHOWERS IN THE EVENING. SLIGHT
CHANCE OF THUNDERSTORMS LATE 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 NORTHEAST IN THE AFTERNOON.
SUNNY. WAVES 1 FOOT OR LESS.
LSZ146-221000-
PORT WING TO SAND ISLAND WI-
721 PM CDT FRI AUG 21 2026
REST OF TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING WEST IN THE
LATE EVENING AND OVERNIGHT. CHANCE OF SHOWERS IN THE EVENING.
SLIGHT CHANCE OF THUNDERSTORMS LATE 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. 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.
LSZ147-221000-
SAND ISLAND TO BAYFIELD WI-
721 PM CDT FRI AUG 21 2026
REST OF TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST
AFTER MIDNIGHT. CHANCE OF SPRINKLES THROUGH THE NIGHT. SLIGHT
CHANCE OF THUNDERSTORMS IN THE LATE EVENING AND EARLY MORNING.
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. 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.
LSZ150-221000-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
721 PM CDT FRI AUG 21 2026
REST OF 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 10 KNOTS RISING TO 10 TO 15 KNOTS IN
THE LATE MORNING AND AFTERNOON. GUSTS UP TO 20 KNOTS. SUNNY.
WAVES 1 TO 2 FEET.
SATURDAY NIGHT
NORTH WIND 5 TO 10 KNOTS. 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.
LSZ121-221000-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
721 PM CDT FRI AUG 21 2026
REST OF TONIGHT
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST LATE
IN THE EVENING, THEN BECOMING WEST AFTER MIDNIGHT. CHANCE OF
SPRINKLES AND SLIGHT CHANCE OF THUNDERSTORMS. WAVES 1 FOOT OR
LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE 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.
LSZ148-221000-
OAK POINT TO SAXON HARBOR WI-
721 PM CDT FRI AUG 21 2026
REST OF 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 IN
THE LATE MORNING AND 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 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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