411
FZUS53 KDLH 180513
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
1212 AM CDT TUE AUG 18 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.
LSZ140-181600-
GRAND PORTAGE TO GRAND MARAIS MN-
1212 AM CDT TUE AUG 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH
THIS EVENING...
TODAY
NORTHWEST WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING SOUTHWEST 10 TO 15 KNOTS WITH GUSTS TO AROUND
25 KNOTS IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 3 FEET.
TONIGHT
WEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND 20 KNOTS
BECOMING NORTHWEST 5 TO 10 KNOTS AFTER MIDNIGHT. PARTLY CLOUDY.
WAVES 1 TO 3 FEET.
WEDNESDAY
WEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST 10 TO
15 KNOTS WITH GUSTS TO AROUND 20 KNOTS IN THE AFTERNOON. SUNNY.
WAVES 1 TO 2 FEET.
WEDNESDAY NIGHT
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING NORTH
AFTER MIDNIGHT. PARTLY CLOUDY. WAVES 1 TO 2 FEET.
LSZ141-181600-
GRAND MARAIS TO TACONITE HARBOR MN-
1212 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST WITH GUSTS TO
AROUND 20 KNOTS IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 TO
2 FEET.
TONIGHT
WEST WIND 5 TO 10 KNOTS BECOMING NORTHWEST AFTER
MIDNIGHT. MOSTLY CLEAR. WAVES 1 TO 2 FEET.
WEDNESDAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
WEST WIND 5 KNOTS BECOMING NORTHWEST LATE IN
THE EVENING, THEN BECOMING VARIABLE 10 KNOTS OR LESS AFTER
MIDNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
LSZ142-181600-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
1212 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE AFTERNOON.
MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHWEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
WEDNESDAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE
LATE MORNING AND AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
WEST WIND 5 KNOTS EARLY IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS. PARTLY CLOUDY. WAVES 1 FOOT
OR LESS.
LSZ143-181600-
SILVER BAY HARBOR TO TWO HARBORS MN-
1212 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE AFTERNOON.
MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHWEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
WEDNESDAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE
LATE MORNING AND AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
WEST WIND 5 KNOTS EARLY IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS. PARTLY CLOUDY. WAVES 1 FOOT
OR LESS.
LSZ144-181600-
TWO HARBORS TO DULUTH MN-
1212 AM CDT TUE AUG 18 2026
TODAY
NORTHWEST WIND 5 KNOTS BECOMING WEST IN THE AFTERNOON.
MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHWEST WIND 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES
1 FOOT OR LESS.
WEDNESDAY
NORTHWEST WIND 5 KNOTS BECOMING WEST IN THE LATE
MORNING AND AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
WEST WIND 5 KNOTS BECOMING NORTH LATE IN THE
EVENING, THEN BECOMING VARIABLE 10 KNOTS OR LESS AFTER MIDNIGHT
BECOMING NORTHWEST 5 KNOTS EARLY IN THE MORNING. SLIGHT CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
LSZ145-181600-
DULUTH MN TO PORT WING WI-
1212 AM CDT TUE AUG 18 2026
TODAY
NORTHWEST WIND 5 KNOTS BECOMING WEST IN THE AFTERNOON.
MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
WEST WIND 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
WEDNESDAY
WEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
WEST WIND 5 KNOTS BECOMING SOUTHEAST LATE IN
THE EVENING, THEN BECOMING VARIABLE 10 KNOTS OR LESS AFTER
MIDNIGHT BECOMING SOUTHWEST 5 KNOTS EARLY IN THE MORNING. SLIGHT
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
LSZ146-181600-
PORT WING TO SAND ISLAND WI-
1212 AM CDT TUE AUG 18 2026
TODAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
WEDNESDAY
WEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
SOUTHWEST WIND 5 KNOTS EARLY IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS. PARTLY CLOUDY. WAVES 1 FOOT
OR LESS.
LSZ147-181600-
SAND ISLAND TO BAYFIELD WI-
1212 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST LATE IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
WEDNESDAY
WEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
SOUTHWEST WIND 5 KNOTS EARLY IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS. PARTLY CLOUDY. WAVES 1 FOOT
OR LESS.
LSZ150-181600-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
1212 AM CDT TUE AUG 18 2026
TODAY
NORTHWEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 2 FEET.
TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING WEST IN THE LATE
EVENING AND OVERNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
WEDNESDAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING WEST EARLY IN
THE MORNING. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
LSZ121-181600-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
1212 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 KNOTS BECOMING NORTHWEST LATE IN THE
MORNING, THEN BECOMING NORTH EARLY IN THE AFTERNOON BECOMING
SOUTHEAST LATE IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR
LESS.
TONIGHT
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
WEDNESDAY
WEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
WEST WIND 5 KNOTS EARLY IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS, THEN BECOMING SOUTHWEST
5 KNOTS AFTER MIDNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
LSZ148-181600-
OAK POINT TO SAXON HARBOR WI-
1212 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 KNOTS BECOMING NORTHWEST IN THE LATE MORNING
AND EARLY AFTERNOON, THEN BECOMING SOUTHEAST LATE IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING WEST IN THE LATE
EVENING AND OVERNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
WEDNESDAY
WEST WIND 5 KNOTS BECOMING NORTHWEST EARLY IN THE
AFTERNOON, THEN BECOMING EAST LATE IN THE AFTERNOON. SUNNY. WAVES
1 FOOT OR LESS.
WEDNESDAY NIGHT
SOUTH WIND 5 KNOTS BECOMING SOUTHWEST EARLY IN
THE MORNING. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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