970
FZUS53 KDLH 181058
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
557 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-
557 AM CDT TUE AUG 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM CDT THIS AFTERNOON
THROUGH THIS EVENING...
TODAY
WEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND 20 KNOTS
BECOMING SOUTHWEST WITH GUSTS TO AROUND 25 KNOTS LATE 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. MOSTLY CLEAR.
WAVES 1 TO 3 FEET.
WEDNESDAY
NORTHWEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST WITH
GUSTS TO AROUND 20 KNOTS IN THE LATE MORNING AND AFTERNOON.
SUNNY. WAVES 1 TO 2 FEET.
WEDNESDAY NIGHT
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING
NORTHWEST LATE IN THE EVENING, THEN BECOMING NORTH AFTER
MIDNIGHT. PARTLY CLOUDY. WAVES 1 TO 2 FEET.
LSZ141-181600-
GRAND MARAIS TO TACONITE HARBOR MN-
557 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
WEST WIND 5 TO 10 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
SOUTHWEST WIND 5 KNOTS BECOMING NORTH IN THE
LATE EVENING AND OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
LSZ142-181600-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
557 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE AFTERNOON.
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, THEN BECOMING NORTH 5 KNOTS
AFTER MIDNIGHT BECOMING VARIABLE 10 KNOTS OR LESS. PARTLY CLOUDY.
WAVES 1 FOOT OR LESS.
LSZ143-181600-
SILVER BAY HARBOR TO TWO HARBORS MN-
557 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 KNOTS. 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
NORTHWEST 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-
557 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 TO 10 KNOTS. MOSTLY SUNNY. WAVES 1 FOOT OR
LESS.
TONIGHT
NORTHWEST WIND 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES
1 FOOT OR LESS.
WEDNESDAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST 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 NORTH 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-
557 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 TO 10 KNOTS. PARTLY SUNNY EARLY IN THE
MORNING THEN CLEARING. 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
NORTHEAST WIND 5 KNOTS BECOMING SOUTHEAST IN
THE LATE EVENING AND OVERNIGHT. SLIGHT CHANCE OF RAIN SHOWERS
AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
LSZ146-181600-
PORT WING TO SAND ISLAND WI-
557 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 TO 10 KNOTS. MOSTLY SUNNY. WAVES 1 FOOT OR
LESS.
TONIGHT
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
WEDNESDAY
SOUTHWEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
SOUTH WIND 5 KNOTS EARLY IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS, THEN BECOMING EAST 5 KNOTS
EARLY IN THE MORNING. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
LSZ147-181600-
SAND ISLAND TO BAYFIELD WI-
557 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 TO 10 KNOTS. MOSTLY SUNNY. WAVES 1 FOOT OR
LESS.
TONIGHT
WEST WIND 5 KNOTS. 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
SOUTH 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-
557 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST LATE 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 TO 10 KNOTS BECOMING SOUTH LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
SOUTHWEST WIND 5 KNOTS. PARTLY CLOUDY. WAVES
1 FOOT OR LESS.
LSZ121-181600-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
557 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 KNOTS BECOMING NORTHWEST IN THE LATE MORNING
AND 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 BECOMING NORTH LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
EAST WIND 5 KNOTS BECOMING SOUTHWEST IN THE
LATE EVENING AND OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
LSZ148-181600-
OAK POINT TO SAXON HARBOR WI-
557 AM CDT TUE AUG 18 2026
TODAY
WEST WIND 5 TO 10 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 BECOMING NORTH EARLY IN THE
AFTERNOON, THEN BECOMING EAST LATE IN THE AFTERNOON. SUNNY. WAVES
1 FOOT OR LESS.
WEDNESDAY NIGHT
SOUTHEAST WIND 5 KNOTS BECOMING SOUTH IN THE
LATE EVENING AND OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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