232
FZUS53 KDLH 202333
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
632 PM CDT THU AUG 20 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.
LSZ140-211000-
GRAND PORTAGE TO GRAND MARAIS MN-
632 PM CDT THU AUG 20 2026
REST OF TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. PATCHY FOG
THROUGH THE NIGHT. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
EVENING. SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 TO 10 KNOTS BECOMING NORTH EARLY IN
THE AFTERNOON, THEN BECOMING SOUTHWEST LATE IN THE AFTERNOON.
AREAS OF DENSE FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING NORTHWEST
WITH GUSTS TO AROUND 20 KNOTS AFTER MIDNIGHT. SLIGHT CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
IN THE MORNING. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ141-211000-
GRAND MARAIS TO TACONITE HARBOR MN-
632 PM CDT THU AUG 20 2026
REST OF TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. PATCHY FOG
THROUGH THE NIGHT. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
EVENING. SLIGHT CHANCE OF RAIN SHOWERS TOWARD DAYBREAK. WAVES
1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 KNOTS BECOMING WEST EARLY IN THE
AFTERNOON, THEN BECOMING SOUTHWEST LATE IN THE AFTERNOON. AREAS
OF FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
WEST WIND 5 KNOTS BECOMING NORTHWEST AFTER
MIDNIGHT. MOSTLY CLOUDY IN THE EVENING THEN BECOMING PARTLY
CLOUDY. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
LSZ142-211000-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
632 PM CDT THU AUG 20 2026
REST OF TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING. PATCHY FOG THROUGH THE
NIGHT. WAVES 1 FOOT OR LESS.
FRIDAY
NORTH WIND 5 KNOTS BECOMING SOUTHWEST IN THE AFTERNOON.
PATCHY FOG IN THE MORNING. SLIGHT CHANCE OF RAIN SHOWERS IN THE
MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST IN THE
LATE EVENING AND OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE MORNING. SUNNY. WAVES 1 FOOT OR LESS.
LSZ143-211000-
SILVER BAY HARBOR TO TWO HARBORS MN-
632 PM CDT THU AUG 20 2026
REST OF TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING. SLIGHT CHANCE OF RAIN
SHOWERS AFTER MIDNIGHT. PATCHY FOG THROUGH THE NIGHT. WAVES
1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 KNOTS BECOMING WEST IN THE LATE
MORNING AND EARLY AFTERNOON, THEN BECOMING SOUTHWEST LATE IN THE
AFTERNOON. PATCHY FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST IN THE
LATE EVENING AND OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR
LESS.
LSZ144-211000-
TWO HARBORS TO DULUTH MN-
632 PM CDT THU AUG 20 2026
REST OF TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING. PATCHY FOG THROUGH THE
NIGHT. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 KNOTS BECOMING WEST IN THE LATE
MORNING AND EARLY AFTERNOON, THEN BECOMING WEST 5 KNOTS LATE IN
THE AFTERNOON. PATCHY FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
WEST WIND 5 KNOTS BECOMING NORTHWEST IN THE LATE
EVENING AND OVERNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS
LATE IN THE MORNING. SUNNY. WAVES 1 FOOT OR LESS.
LSZ145-211000-
DULUTH MN TO PORT WING WI-
632 PM CDT THU AUG 20 2026
REST OF TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING, THEN SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT. PATCHY FOG AFTER MIDNIGHT. WAVES 1 FOOT
OR LESS.
FRIDAY
NORTHEAST WIND 5 KNOTS BECOMING NORTHWEST IN THE LATE
MORNING AND EARLY AFTERNOON, THEN BECOMING WEST LATE IN THE
AFTERNOON. PATCHY FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
WEST WIND 5 TO 10 KNOTS BECOMING NORTHWEST EARLY
IN THE MORNING. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
IN THE LATE MORNING AND AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ146-211000-
PORT WING TO SAND ISLAND WI-
632 PM CDT THU AUG 20 2026
REST OF TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. PATCHY FOG
THROUGH THE NIGHT. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
EVENING. SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT OR
LESS.
FRIDAY
NORTH WIND 5 KNOTS BECOMING WEST IN THE AFTERNOON.
PATCHY FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
WEST WIND 5 KNOTS RISING TO 5 TO 10 KNOTS AFTER
MIDNIGHT. SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT
OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR
LESS.
LSZ147-211000-
SAND ISLAND TO BAYFIELD WI-
632 PM CDT THU AUG 20 2026
REST OF TONIGHT
EAST WIND 5 TO 10 KNOTS BECOMING NORTHWEST
TOWARD DAYBREAK. CHANCE OF THUNDERSTORMS IN THE EVENING. CHANCE
OF SHOWERS UNTIL EARLY MORNING. PATCHY FOG THROUGH THE NIGHT.
WAVES 1 FOOT OR LESS.
FRIDAY
NORTHWEST WIND 5 KNOTS. PATCHY FOG IN THE MORNING.
WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST AFTER
MIDNIGHT. SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT
OR LESS.
SATURDAY
NORTHWEST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR
LESS.
LSZ150-211000-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
632 PM CDT THU AUG 20 2026
REST OF TONIGHT
SOUTHEAST WIND 5 TO 10 KNOTS. CHANCE OF
THUNDERSTORMS IN THE EVENING. CHANCE OF SHOWERS UNTIL EARLY
MORNING. SLIGHT CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. PATCHY
FOG THROUGH THE NIGHT. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHWEST WIND 5 TO 10 KNOTS. PATCHY FOG IN THE
MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST AFTER
MIDNIGHT. SLIGHT CHANCE OF 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 EARLY AFTERNOON. SUNNY. WAVES 1 FOOT OR
LESS.
LSZ121-211000-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
632 PM CDT THU AUG 20 2026
REST OF TONIGHT
SOUTHEAST WIND 5 TO 10 KNOTS BECOMING
SOUTHWEST TOWARD DAYBREAK. CHANCE OF THUNDERSTORMS IN THE
EVENING. CHANCE OF SHOWERS UNTIL EARLY MORNING. SLIGHT CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. PATCHY FOG AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
FRIDAY
WEST WIND 5 KNOTS BECOMING NORTHWEST IN THE AFTERNOON.
PATCHY FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING WEST AFTER
MIDNIGHT. 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 EARLY AFTERNOON. SUNNY. WAVES 1 FOOT OR
LESS.
LSZ148-211000-
OAK POINT TO SAXON HARBOR WI-
632 PM CDT THU AUG 20 2026
REST OF TONIGHT
SOUTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTH
AFTER MIDNIGHT. CHANCE OF THUNDERSTORMS IN THE EVENING. CHANCE OF
SHOWERS UNTIL EARLY MORNING. SLIGHT CHANCE OF THUNDERSTORMS AFTER
MIDNIGHT. PATCHY FOG AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
FRIDAY
WEST WIND 5 KNOTS BECOMING NORTHWEST IN THE AFTERNOON.
PATCHY FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING WEST AFTER
MIDNIGHT. CHANCE OF 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 EARLY AFTERNOON. CHANCE OF RAIN SHOWERS IN
THE MORNING. WAVES 1 FOOT OR LESS.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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