449
FZUS53 KDLH 200718
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
218 AM CDT MON APR 20 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.
LSZ140-201600-
GRAND PORTAGE TO GRAND MARAIS MN-
218 AM CDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM NOON CDT TODAY THROUGH
THIS EVENING...
TODAY
SOUTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS BECOMING SOUTH WITH GUSTS TO AROUND 25 KNOTS LATE IN THE
AFTERNOON. MOSTLY SUNNY IN THE MORNING THEN BECOMING MOSTLY
CLOUDY. WAVES 1 TO 2 FEET BUILDING TO 3 TO 5 FEET IN THE
AFTERNOON.
TONIGHT
SOUTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS BECOMING WEST 5 TO 10 KNOTS EARLY IN THE MORNING. PARTLY
CLOUDY. WAVES 3 TO 5 FEET.
TUESDAY
WEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST LATE IN THE
AFTERNOON. SUNNY. WAVES 1 TO 2 FEET.
TUESDAY NIGHT
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING NORTHEAST
EARLY IN THE MORNING. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
LSZ141-201600-
GRAND MARAIS TO TACONITE HARBOR MN-
218 AM CDT MON APR 20 2026
TODAY
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING SOUTH 10 TO
15 KNOTS WITH GUSTS TO AROUND 20 KNOTS IN THE AFTERNOON. MOSTLY
SUNNY IN THE MORNING THEN BECOMING MOSTLY CLOUDY. WAVES 1 TO
2 FEET.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING WEST AFTER
MIDNIGHT. MOSTLY CLEAR. WAVES 1 TO 2 FEET.
TUESDAY
WEST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 TO 2 FEET.
TUESDAY NIGHT
SOUTHWEST WIND 5 KNOTS EARLY IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS, THEN BECOMING NORTHEAST
5 KNOTS AFTER MIDNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
LSZ142-201600-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
218 AM CDT MON APR 20 2026
TODAY
SOUTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE AFTERNOON. MOSTLY SUNNY IN THE MORNING THEN BECOMING PARTLY
SUNNY. WAVES 1 TO 2 FEET.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING WEST EARLY IN THE MORNING. PARTLY CLOUDY IN THE
EVENING THEN BECOMING CLEAR. WAVES 1 TO 2 FEET.
TUESDAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE AFTERNOON.
SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
SOUTHWEST WIND 5 KNOTS EARLY IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS, THEN BECOMING NORTHEAST
5 KNOTS AFTER MIDNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
LSZ143-201600-
SILVER BAY HARBOR TO TWO HARBORS MN-
218 AM CDT MON APR 20 2026
TODAY
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. MOSTLY SUNNY IN THE MORNING THEN BECOMING PARTLY SUNNY.
WAVES 1 TO 3 FEET.
TONIGHT
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING WEST 5 KNOTS EARLY IN THE MORNING. MOSTLY
CLEAR. WAVES 1 TO 3 FEET.
TUESDAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE AFTERNOON.
SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
SOUTH WIND 5 KNOTS BECOMING NORTHEAST IN THE
LATE EVENING AND OVERNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
LSZ144-201600-
TWO HARBORS TO DULUTH MN-
218 AM CDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM CDT THIS AFTERNOON
THROUGH THIS EVENING...
TODAY
SOUTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. MOSTLY SUNNY. WAVES 1 TO 2 FEET BUILDING TO 1 TO 3 FEET
LATE IN THE AFTERNOON.
TONIGHT
SOUTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS EASING TO 5 TO 10 KNOTS AFTER MIDNIGHT. MOSTLY CLEAR.
WAVES 1 TO 3 FEET.
TUESDAY
NORTH WIND 5 KNOTS BECOMING SOUTHWEST EARLY IN THE
AFTERNOON, THEN BECOMING SOUTH LATE IN THE AFTERNOON. SUNNY.
WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
NORTHEAST WIND 5 KNOTS. CLEAR. WAVES 1 FOOT OR
LESS.
LSZ145-201600-
DULUTH MN TO PORT WING WI-
218 AM CDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM CDT THIS AFTERNOON
THROUGH THIS EVENING...
TODAY
SOUTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. MOSTLY SUNNY. WAVES 1 TO 2 FEET BUILDING TO 1 TO 3 FEET
LATE IN THE AFTERNOON.
TONIGHT
SOUTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS EASING TO 5 TO 10 KNOTS AFTER MIDNIGHT. MOSTLY CLEAR.
WAVES 1 TO 3 FEET.
TUESDAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
EAST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
LSZ146-201600-
PORT WING TO SAND ISLAND WI-
218 AM CDT MON APR 20 2026
TODAY
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. MOSTLY SUNNY IN THE MORNING THEN BECOMING PARTLY SUNNY.
WAVES 1 TO 2 FEET.
TONIGHT
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS IN
THE EVENING. MOSTLY CLEAR. WAVES 1 TO 3 FEET.
TUESDAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
SOUTHEAST WIND 5 KNOTS BECOMING EAST AFTER
MIDNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
LSZ147-201600-
SAND ISLAND TO BAYFIELD WI-
218 AM CDT MON APR 20 2026
TODAY
SOUTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS LATE
IN THE AFTERNOON. MOSTLY SUNNY IN THE MORNING THEN BECOMING
PARTLY SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING WEST EARLY IN THE MORNING. PARTLY CLOUDY IN THE
EVENING THEN BECOMING CLEAR. WAVES 1 TO 2 FEET.
TUESDAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTH LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
SOUTHEAST WIND 5 KNOTS IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS, THEN BECOMING SOUTHEAST 5 KNOTS EARLY
IN THE MORNING. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
LSZ150-201600-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
218 AM CDT MON APR 20 2026
TODAY
SOUTH WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND 20 KNOTS.
MOSTLY SUNNY IN THE MORNING THEN BECOMING PARTLY SUNNY. WAVES
1 TO 2 FEET.
TONIGHT
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING WEST 5 TO 10 KNOTS EARLY IN THE MORNING. MOSTLY
CLEAR. WAVES 1 TO 3 FEET.
TUESDAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTH LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
SOUTHEAST WIND 5 KNOTS. MOSTLY CLEAR. WAVES
1 FOOT OR LESS.
LSZ121-201600-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
218 AM CDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM CDT THIS AFTERNOON
THROUGH THIS EVENING...
TODAY
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. MOSTLY SUNNY IN THE MORNING THEN BECOMING PARTLY SUNNY.
WAVES 1 FOOT OR LESS.
TONIGHT
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING WEST 5 TO 10 KNOTS EARLY IN THE MORNING. PARTLY
CLOUDY IN THE EVENING THEN BECOMING CLEAR. WAVES 1 FOOT OR LESS.
TUESDAY
NORTHWEST WIND 5 KNOTS BECOMING EAST LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
SOUTHEAST WIND 5 KNOTS IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS, THEN BECOMING SOUTH 5 KNOTS EARLY IN
THE MORNING. CLEAR. WAVES 1 FOOT OR LESS.
LSZ148-201600-
OAK POINT TO SAXON HARBOR WI-
218 AM CDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM CDT THIS AFTERNOON
THROUGH THIS EVENING...
TODAY
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. MOSTLY SUNNY IN THE MORNING THEN BECOMING MOSTLY
CLOUDY. WAVES 1 TO 2 FEET.
TONIGHT
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS.
PARTLY CLOUDY IN THE EVENING THEN CLEARING. WAVES 1 TO 2 FEET.
TUESDAY
NORTHWEST WIND 5 KNOTS BECOMING NORTH IN THE LATE
MORNING AND EARLY AFTERNOON, THEN BECOMING EAST LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
SOUTHEAST WIND 5 KNOTS BECOMING SOUTH EARLY IN
THE MORNING. CLEAR. WAVES 1 FOOT OR LESS.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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