056
FZUS53 KDLH 122302
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
602 PM CDT WED AUG 12 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.
LSZ140-130400-
GRAND PORTAGE TO GRAND MARAIS MN-
602 PM CDT WED AUG 12 2026
TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTH AFTER MIDNIGHT.
MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
NORTH WIND 5 KNOTS BECOMING EAST LATE IN THE MORNING,
THEN BECOMING SOUTH IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT
OR LESS.
THURSDAY NIGHT
SOUTH WIND 5 KNOTS BECOMING NORTH IN THE LATE
EVENING AND OVERNIGHT. MOSTLY CLOUDY IN THE EVENING THEN BECOMING
PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 TO 10 KNOTS BECOMING EAST IN THE
AFTERNOON. PARTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ141-130400-
GRAND MARAIS TO TACONITE HARBOR MN-
602 PM CDT WED AUG 12 2026
TONIGHT
WEST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS. SLIGHT CHANCE OF RAIN SHOWERS LATE IN
THE NIGHT. WAVES 1 FOOT OR LESS.
THURSDAY
NORTH WIND 5 KNOTS BECOMING SOUTH IN THE LATE MORNING
AND EARLY AFTERNOON, THEN BECOMING EAST LATE IN THE AFTERNOON.
PARTLY SUNNY. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLOUDY IN THE
EVENING THEN BECOMING PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 KNOTS BECOMING EAST IN THE AFTERNOON.
PARTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ142-130400-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
602 PM CDT WED AUG 12 2026
TONIGHT
WEST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS. SLIGHT CHANCE OF RAIN SHOWERS LATE IN
THE NIGHT. WAVES 1 FOOT OR LESS.
THURSDAY
VARIABLE WINDS 10 KNOTS OR LESS BECOMING EAST 5 KNOTS
LATE IN THE AFTERNOON. SLIGHT CHANCE OF RAIN SHOWERS IN THE
MORNING. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 KNOTS IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS, THEN BECOMING NORTHEAST 5 KNOTS EARLY
IN THE MORNING. MOSTLY CLOUDY IN THE EVENING THEN BECOMING PARTLY
CLOUDY. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 TO 10 KNOTS. PARTLY SUNNY. WAVES
1 FOOT OR LESS.
LSZ143-130400-
SILVER BAY HARBOR TO TWO HARBORS MN-
602 PM CDT WED AUG 12 2026
TONIGHT
WEST WIND 5 KNOTS BECOMING NORTH LATE IN THE EVENING,
THEN BECOMING VARIABLE 10 KNOTS OR LESS AFTER MIDNIGHT BECOMING
NORTH 5 KNOTS LATE IN THE NIGHT. SLIGHT CHANCE OF RAIN SHOWERS
LATE IN THE NIGHT. WAVES 1 FOOT OR LESS.
THURSDAY
NORTHEAST WIND 5 KNOTS. SLIGHT CHANCE OF RAIN SHOWERS
IN THE MORNING. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. MOSTLY CLOUDY IN
THE EVENING THEN BECOMING PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS IN
THE LATE MORNING AND AFTERNOON. PARTLY SUNNY. WAVES 1 TO 2 FEET.
LSZ144-130400-
TWO HARBORS TO DULUTH MN-
602 PM CDT WED AUG 12 2026
TONIGHT
NORTHEAST WIND 5 KNOTS. SLIGHT CHANCE OF SHOWERS LATE
IN THE NIGHT. WAVES 1 FOOT OR LESS.
THURSDAY
NORTHEAST WIND 5 TO 10 KNOTS. SLIGHT CHANCE OF
SHOWERS IN THE MORNING. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. MOSTLY CLOUDY.
WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. PARTLY SUNNY. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET
LATE IN THE AFTERNOON.
LSZ145-130400-
DULUTH MN TO PORT WING WI-
602 PM CDT WED AUG 12 2026
TONIGHT
NORTHEAST WIND 5 KNOTS. PARTLY CLOUDY EARLY IN THE
EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
NORTHEAST WIND 5 TO 10 KNOTS. SLIGHT CHANCE OF
SHOWERS IN THE MORNING. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. MOSTLY CLOUDY.
WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. PATCHY FOG IN THE MORNING. WAVES 1 TO 3 FEET BUILDING
TO 2 TO 4 FEET LATE IN THE AFTERNOON.
LSZ146-130400-
PORT WING TO SAND ISLAND WI-
602 PM CDT WED AUG 12 2026
TONIGHT
SOUTHEAST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS. PARTLY CLOUDY EARLY IN THE EVENING
THEN BECOMING MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
NORTHEAST WIND 5 TO 10 KNOTS. SLIGHT CHANCE OF
SHOWERS IN THE MORNING. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. MOSTLY CLOUDY.
WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS IN
THE AFTERNOON. PARTLY SUNNY. WAVES 1 TO 2 FEET.
LSZ147-130400-
SAND ISLAND TO BAYFIELD WI-
602 PM CDT WED AUG 12 2026
TONIGHT
SOUTHEAST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS. PARTLY CLOUDY IN THE EVENING THEN
BECOMING MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
VARIABLE WINDS 10 KNOTS OR LESS BECOMING NORTHEAST
5 KNOTS IN THE LATE MORNING AND AFTERNOON. SLIGHT CHANCE OF
SHOWERS IN THE MORNING. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 KNOTS. PARTLY CLOUDY IN THE
EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS LATE
IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ150-130400-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
602 PM CDT WED AUG 12 2026
TONIGHT
SOUTHEAST WIND 5 KNOTS IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS, THEN BECOMING NORTH 5 KNOTS LATE IN
THE NIGHT. PARTLY CLOUDY IN THE EVENING THEN BECOMING MOSTLY
CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
NORTHEAST WIND 5 KNOTS. SLIGHT CHANCE OF SHOWERS IN
THE MORNING. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLOUDY. WAVES
1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS IN
THE AFTERNOON. PARTLY SUNNY. WAVES 1 TO 2 FEET.
LSZ121-130400-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
602 PM CDT WED AUG 12 2026
TONIGHT
NORTHEAST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS. PARTLY CLOUDY IN THE EVENING THEN
BECOMING MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
VARIABLE WINDS 10 KNOTS OR LESS BECOMING NORTHEAST
5 TO 10 KNOTS IN THE LATE MORNING AND AFTERNOON. SLIGHT CHANCE OF
SHOWERS. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLOUDY. WAVES
1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. PATCHY FOG IN THE MORNING. WAVES 1 TO 2 FEET.
LSZ148-130400-
OAK POINT TO SAXON HARBOR WI-
602 PM CDT WED AUG 12 2026
TONIGHT
SOUTHEAST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS. PARTLY CLOUDY IN THE EVENING THEN
BECOMING MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
VARIABLE WINDS 10 KNOTS OR LESS BECOMING NORTHEAST
5 KNOTS IN THE LATE MORNING AND AFTERNOON. SLIGHT CHANCE OF
SHOWERS. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLOUDY. WAVES
1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. PARTLY SUNNY. WAVES 1 TO 3 FEET.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page