580
FZUS53 KDLH 141147
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
647 AM CDT FRI AUG 14 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.
LSZ140-141600-
GRAND PORTAGE TO GRAND MARAIS MN-
647 AM CDT FRI AUG 14 2026
TODAY
EAST WIND 5 TO 10 KNOTS. PARTLY SUNNY. WAVES 1 FOOT OR
LESS.
TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. MOSTLY CLOUDY. WAVES
1 FOOT OR LESS.
SATURDAY
EAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS IN THE
AFTERNOON. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. WAVES 1 TO 2 FEET.
SATURDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 20 KNOTS BECOMING NORTHWEST 5 TO 10 KNOTS AFTER MIDNIGHT.
CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING. WAVES 1 TO 2 FEET.
LSZ141-141600-
GRAND MARAIS TO TACONITE HARBOR MN-
647 AM CDT FRI AUG 14 2026
TODAY
NORTH WIND 5 KNOTS BECOMING NORTHEAST IN THE LATE
MORNING AND AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. MOSTLY CLOUDY. WAVES
1 FOOT OR LESS.
SATURDAY
EAST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN THE
LATE MORNING AND AFTERNOON. CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. WAVES 1 TO 2 FEET.
SATURDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS WITH GUSTS TO
AROUND 20 KNOTS BECOMING NORTHWEST AFTER MIDNIGHT. SLIGHT CHANCE
OF THUNDERSTORMS IN THE EVENING. CHANCE OF RAIN SHOWERS THROUGH
THE NIGHT. WAVES 1 TO 2 FEET.
LSZ142-141600-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
647 AM CDT FRI AUG 14 2026
TODAY
NORTH WIND 5 KNOTS BECOMING NORTHEAST WITH GUSTS TO
AROUND 20 KNOTS IN THE LATE MORNING AND AFTERNOON. MOSTLY SUNNY.
WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS
EARLY IN THE EVENING. MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
SATURDAY
NORTHEAST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE LATE MORNING AND AFTERNOON. SLIGHT CHANCE OF RAIN SHOWERS IN
THE MORNING, THEN CHANCE OF RAIN SHOWERS IN THE AFTERNOON. WAVES
1 TO 2 FEET.
SATURDAY NIGHT
NORTHEAST WIND 5 KNOTS IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS, THEN BECOMING NORTHWEST 5 KNOTS EARLY
IN THE MORNING. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. WAVES 1 FOOT OR LESS.
LSZ143-141600-
SILVER BAY HARBOR TO TWO HARBORS MN-
647 AM CDT FRI AUG 14 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING
THROUGH LATE TONIGHT...
TODAY
NORTHWEST WIND 5 KNOTS BECOMING NORTHEAST 10 TO 15 KNOTS
WITH GUSTS TO AROUND 25 KNOTS IN THE LATE MORNING AND AFTERNOON.
MOSTLY SUNNY. WAVES 1 TO 3 FEET.
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS.
MOSTLY CLOUDY. WAVES 1 TO 3 FEET.
SATURDAY
NORTHEAST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE LATE MORNING AND AFTERNOON. SLIGHT CHANCE OF RAIN SHOWERS IN
THE MORNING, THEN CHANCE OF RAIN SHOWERS IN THE AFTERNOON. WAVES
1 TO 2 FEET.
SATURDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS WITH GUSTS TO
AROUND 20 KNOTS IN THE EVENING BECOMING VARIABLE 10 KNOTS OR
LESS, THEN BECOMING NORTHWEST 5 KNOTS EARLY IN THE MORNING.
CHANCE OF RAIN SHOWERS IN THE EVENING. WAVES 1 FOOT OR LESS.
LSZ144-141600-
TWO HARBORS TO DULUTH MN-
647 AM CDT FRI AUG 14 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING
THROUGH LATE TONIGHT...
TODAY
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. MOSTLY SUNNY. WAVES 1 TO 2 FEET BUILDING TO 2 TO 4 FEET
IN THE AFTERNOON.
TONIGHT
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS EASING TO 5 TO 10 KNOTS EARLY IN THE MORNING. PARTLY
CLOUDY IN THE EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 2 TO
4 FEET SUBSIDING TO 1 TO 3 FEET AFTER MIDNIGHT.
SATURDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
IN THE LATE MORNING AND AFTERNOON. CHANCE OF RAIN SHOWERS. WAVES
1 TO 2 FEET.
SATURDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS WITH GUSTS TO
AROUND 20 KNOTS BECOMING NORTHWEST AFTER MIDNIGHT. SLIGHT CHANCE
OF RAIN SHOWERS THROUGH THE NIGHT. WAVES 1 TO 2 FEET.
LSZ145-141600-
DULUTH MN TO PORT WING WI-
647 AM CDT FRI AUG 14 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING
THROUGH LATE TONIGHT...
TODAY
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. PATCHY DENSE FOG EARLY IN THE MORNING. WAVES 1 TO
2 FEET BUILDING TO 2 TO 4 FEET IN THE AFTERNOON.
TONIGHT
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS EASING TO 5 TO 10 KNOTS EARLY IN THE MORNING. PARTLY
CLOUDY IN THE EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 2 TO
4 FEET SUBSIDING TO 1 TO 3 FEET AFTER MIDNIGHT.
SATURDAY
NORTHEAST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE LATE MORNING AND AFTERNOON. CHANCE OF RAIN SHOWERS. WAVES
1 TO 2 FEET.
SATURDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS WITH GUSTS TO
AROUND 20 KNOTS BECOMING NORTHWEST AFTER MIDNIGHT. SLIGHT CHANCE
OF SHOWERS THROUGH THE NIGHT. WAVES 1 TO 2 FEET.
LSZ146-141600-
PORT WING TO SAND ISLAND WI-
647 AM CDT FRI AUG 14 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING
THROUGH LATE TONIGHT...
TODAY
EAST WIND 5 KNOTS BECOMING NORTHEAST 10 TO 15 KNOTS WITH
GUSTS TO AROUND 25 KNOTS IN THE LATE MORNING AND AFTERNOON.
MOSTLY SUNNY. WAVES 1 TO 3 FEET.
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS.
PARTLY CLOUDY IN THE EVENING THEN BECOMING MOSTLY CLOUDY. WAVES
1 TO 2 FEET.
SATURDAY
NORTHEAST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE AFTERNOON. SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN
CHANCE OF SHOWERS IN THE AFTERNOON. WAVES 1 TO 2 FEET.
SATURDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS BECOMING WEST
AFTER MIDNIGHT. CHANCE OF SHOWERS IN THE EVENING. WAVES 1 FOOT OR
LESS.
LSZ147-141600-
SAND ISLAND TO BAYFIELD WI-
647 AM CDT FRI AUG 14 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING
THROUGH THIS EVENING...
TODAY
SOUTHEAST WIND 5 KNOTS BECOMING NORTHEAST WITH GUSTS TO
AROUND 25 KNOTS IN THE LATE MORNING AND AFTERNOON. MOSTLY SUNNY.
WAVES 1 TO 2 FEET.
TONIGHT
EAST WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND 20 KNOTS
EASING TO 5 KNOTS EARLY IN THE MORNING. PARTLY CLOUDY IN THE
EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 1 TO 2 FEET.
SATURDAY
EAST WIND 5 TO 10 KNOTS BECOMING NORTHEAST LATE IN
THE AFTERNOON. SLIGHT CHANCE OF SHOWERS IN THE MORNING, THEN
CHANCE OF SHOWERS IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
SATURDAY NIGHT
NORTHEAST WIND 5 KNOTS BECOMING WEST AFTER
MIDNIGHT. CHANCE OF SHOWERS IN THE EVENING. WAVES 1 FOOT OR LESS.
LSZ150-141600-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
647 AM CDT FRI AUG 14 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING
THROUGH THIS EVENING...
TODAY
SOUTH WIND 5 KNOTS BECOMING NORTHEAST 15 TO 20 KNOTS
WITH GUSTS TO AROUND 30 KNOTS IN THE LATE MORNING AND AFTERNOON.
MOSTLY SUNNY. WAVES 1 TO 2 FEET BUILDING TO 2 TO 4 FEET LATE IN
THE AFTERNOON.
TONIGHT
EAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND 30 KNOTS
EASING TO 5 TO 10 KNOTS EARLY IN THE MORNING. MOSTLY CLOUDY.
WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 2 FEET IN THE LATE EVENING
AND OVERNIGHT.
SATURDAY
EAST WIND 5 TO 10 KNOTS BECOMING NORTHEAST LATE IN
THE AFTERNOON. CHANCE OF SHOWERS IN THE AFTERNOON. WAVES 1 TO
2 FEET.
SATURDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS BECOMING WEST
EARLY IN THE MORNING. CHANCE OF SHOWERS THROUGH THE NIGHT. WAVES
1 TO 2 FEET.
LSZ121-141600-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
647 AM CDT FRI AUG 14 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING
THROUGH THIS EVENING...
TODAY
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
30 KNOTS. AREAS OF FOG EARLY IN THE MORNING. WAVES 1 TO 2 FEET
BUILDING TO 2 TO 4 FEET LATE IN THE AFTERNOON.
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
30 KNOTS BECOMING EAST 5 KNOTS AFTER MIDNIGHT. PARTLY CLOUDY IN
THE EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 2 TO 4 FEET
SUBSIDING TO 1 TO 2 FEET IN THE LATE EVENING AND OVERNIGHT.
SATURDAY
EAST WIND 5 KNOTS BECOMING NORTHEAST LATE IN THE
AFTERNOON. SLIGHT CHANCE OF SHOWERS IN THE MORNING. CHANCE OF
SHOWERS IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
SATURDAY NIGHT
NORTHEAST WIND 5 KNOTS BECOMING WEST IN THE
LATE EVENING AND OVERNIGHT. CHANCE OF SHOWERS THROUGH THE NIGHT.
WAVES 1 FOOT OR LESS.
LSZ148-141600-
OAK POINT TO SAXON HARBOR WI-
647 AM CDT FRI AUG 14 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING
THROUGH THIS EVENING...
TODAY
SOUTHEAST WIND 5 KNOTS BECOMING NORTHEAST 15 TO 20 KNOTS
WITH GUSTS TO AROUND 30 KNOTS IN THE LATE MORNING AND AFTERNOON.
AREAS OF FOG EARLY IN THE MORNING. WAVES 1 TO 2 FEET BUILDING TO
2 TO 4 FEET LATE IN THE AFTERNOON.
TONIGHT
EAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND 30 KNOTS
BECOMING SOUTHEAST 5 KNOTS AFTER MIDNIGHT. PARTLY CLOUDY IN THE
EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 2 TO 4 FEET SUBSIDING
TO 1 TO 2 FEET IN THE LATE EVENING AND OVERNIGHT.
SATURDAY
EAST WIND 5 KNOTS BECOMING NORTHEAST IN THE
AFTERNOON. CHANCE OF SHOWERS IN THE AFTERNOON. WAVES 1 FOOT OR
LESS.
SATURDAY NIGHT
NORTH WIND 5 KNOTS BECOMING WEST IN THE LATE
EVENING AND OVERNIGHT. CHANCE OF SHOWERS THROUGH THE NIGHT. WAVES
1 FOOT OR LESS.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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