505
FZUS53 KDLH 130451
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
1151 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.
LSZ140-131000-
GRAND PORTAGE TO GRAND MARAIS MN-
1151 PM CDT WED AUG 12 2026
REST OF TONIGHT
SOUTH WIND 5 KNOTS BECOMING NORTHWEST AFTER
MIDNIGHT. MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
NORTH WIND 5 KNOTS BECOMING SOUTH IN THE LATE MORNING
AND AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST LATE
IN THE EVENING, THEN BECOMING NORTHEAST AFTER MIDNIGHT. 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.
LSZ141-131000-
GRAND MARAIS TO TACONITE HARBOR MN-
1151 PM CDT WED AUG 12 2026
REST OF TONIGHT
NORTHEAST WIND 5 KNOTS LATE IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS. MOSTLY CLOUDY. WAVES 1 FOOT
OR LESS.
THURSDAY
NORTH WIND 5 KNOTS BECOMING SOUTH IN THE LATE MORNING
AND EARLY AFTERNOON, THEN BECOMING SOUTHEAST LATE IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
EAST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS, THEN BECOMING NORTHEAST 5 KNOTS EARLY
IN THE MORNING. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
FRIDAY
EAST WIND 5 TO 10 KNOTS. PARTLY SUNNY. WAVES 1 FOOT OR
LESS.
LSZ142-131000-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
1151 PM CDT WED AUG 12 2026
REST OF TONIGHT
NORTH WIND 5 KNOTS LATE IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS. SLIGHT CHANCE OF RAIN SHOWERS
TOWARD DAYBREAK. WAVES 1 FOOT OR LESS.
THURSDAY
NORTHEAST WIND 5 KNOTS BECOMING SOUTHEAST EARLY IN
THE AFTERNOON, THEN BECOMING EAST LATE IN THE AFTERNOON. MOSTLY
SUNNY. 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. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE AFTERNOON. PARTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ143-131000-
SILVER BAY HARBOR TO TWO HARBORS MN-
1151 PM CDT WED AUG 12 2026
REST OF TONIGHT
NORTH WIND 5 KNOTS LATE IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS. PATCHY FOG TOWARD DAYBREAK.
WAVES 1 FOOT OR LESS.
THURSDAY
NORTHEAST WIND 5 KNOTS RISING TO 5 TO 10 KNOTS IN THE
AFTERNOON. SLIGHT CHANCE OF RAIN SHOWERS IN THE MORNING. WAVES
1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. PARTLY CLOUDY.
WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS.
PARTLY SUNNY. WAVES 1 TO 2 FEET.
LSZ144-131000-
TWO HARBORS TO DULUTH MN-
1151 PM CDT WED AUG 12 2026
REST OF TONIGHT
NORTHWEST WIND 5 KNOTS BECOMING NORTHEAST
TOWARD DAYBREAK. 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. PARTLY CLOUDY.
WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
30 KNOTS. MOSTLY SUNNY. WAVES 1 TO 3 FEET.
LSZ145-131000-
DULUTH MN TO PORT WING WI-
1151 PM CDT WED AUG 12 2026
REST OF TONIGHT
WEST WIND 5 TO 10 KNOTS BECOMING NORTHEAST
TOWARD DAYBREAK. 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. PARTLY CLOUDY.
WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. MOSTLY SUNNY. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET
LATE IN THE AFTERNOON.
LSZ146-131000-
PORT WING TO SAND ISLAND WI-
1151 PM CDT WED AUG 12 2026
REST OF TONIGHT
WEST WIND 5 KNOTS BECOMING NORTHWEST AFTER
MIDNIGHT, THEN BECOMING VARIABLE 10 KNOTS OR LESS TOWARD
DAYBREAK. PATCHY FOG TOWARD DAYBREAK. WAVES 1 FOOT OR LESS.
THURSDAY
NORTHEAST WIND 5 TO 10 KNOTS. PARTLY SUNNY. WAVES
1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. PARTLY CLOUDY.
WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
25 KNOTS. MOSTLY SUNNY. WAVES 1 TO 2 FEET.
LSZ147-131000-
SAND ISLAND TO BAYFIELD WI-
1151 PM CDT WED AUG 12 2026
REST OF TONIGHT
NORTHWEST WIND 5 KNOTS LATE IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS. MOSTLY CLOUDY. WAVES 1 FOOT
OR LESS.
THURSDAY
NORTHEAST WIND 5 KNOTS BECOMING EAST IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
EAST WIND 5 KNOTS BECOMING NORTHEAST IN THE
LATE EVENING AND OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 TO 10 KNOTS. GUSTS UP TO 25 KNOTS.
MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ150-131000-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
1151 PM CDT WED AUG 12 2026
REST OF TONIGHT
NORTHWEST WIND 5 KNOTS BECOMING NORTH AFTER
MIDNIGHT, THEN BECOMING VARIABLE 10 KNOTS OR LESS TOWARD
DAYBREAK. MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
NORTHEAST WIND 5 KNOTS BECOMING EAST IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
EAST WIND 5 TO 10 KNOTS. PARTLY CLOUDY. WAVES
1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
30 KNOTS. MOSTLY SUNNY. WAVES 1 TO 2 FEET.
LSZ121-131000-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
1151 PM CDT WED AUG 12 2026
REST OF TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST
AFTER MIDNIGHT, THEN BECOMING VARIABLE 10 KNOTS OR LESS TOWARD
DAYBREAK. MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
NORTHEAST WIND 5 KNOTS RISING TO 5 TO 10 KNOTS IN THE
AFTERNOON. PARTLY SUNNY. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS EASING TO 5 KNOTS
IN THE LATE EVENING AND OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR
LESS.
FRIDAY
EAST WIND 5 KNOTS BECOMING NORTHEAST 10 TO 15 KNOTS
WITH GUSTS TO AROUND 25 KNOTS IN THE AFTERNOON. MOSTLY SUNNY.
WAVES 1 TO 2 FEET.
LSZ148-131000-
OAK POINT TO SAXON HARBOR WI-
1151 PM CDT WED AUG 12 2026
REST OF TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST
AFTER MIDNIGHT, THEN BECOMING VARIABLE 10 KNOTS OR LESS TOWARD
DAYBREAK. MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
NORTH WIND 5 KNOTS BECOMING NORTHEAST IN THE LATE
MORNING AND AFTERNOON. MOSTLY CLOUDY IN THE MORNING THEN BECOMING
MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
EAST WIND 5 TO 10 KNOTS. PARTLY CLOUDY. WAVES
1 FOOT OR LESS.
FRIDAY
EAST WIND 5 KNOTS BECOMING NORTHEAST LATE IN THE
MORNING, THEN RISING TO 10 TO 15 KNOTS WITH GUSTS TO AROUND
30 KNOTS IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 3 FEET.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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