974
FZUS53 KDLH 220443
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
1143 PM CDT TUE APR 21 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.
LSZ140-221000-
GRAND PORTAGE TO GRAND MARAIS MN-
1143 PM CDT TUE APR 21 2026
REST OF TONIGHT
NORTHWEST WIND 5 KNOTS BECOMING NORTHEAST
TOWARD DAYBREAK. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
WEDNESDAY
EAST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR
LESS.
WEDNESDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 20 KNOTS. CHANCE OF RAIN AND SLIGHT CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET AFTER MIDNIGHT.
THURSDAY
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO 25 KNOTS
IN THE AFTERNOON. SLIGHT CHANCE OF RAIN IN THE AFTERNOON. WAVES
3 TO 5 FEET. WAVES OCCASIONALLY TO 7 FEET. A SMALL CRAFT ADVISORY
MAY BE NEEDED.
LSZ141-221000-
GRAND MARAIS TO TACONITE HARBOR MN-
1143 PM CDT TUE APR 21 2026
REST OF TONIGHT
NORTHEAST WIND 5 KNOTS LATE IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
WEDNESDAY
EAST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR
LESS.
WEDNESDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 20 KNOTS. CHANCE OF RAIN AND SLIGHT CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 TO 2 FEET BUILDING TO 2 TO
4 FEET IN THE LATE EVENING AND OVERNIGHT.
THURSDAY
EAST WIND 15 TO 20 KNOTS. GUSTS UP TO 20 KNOTS
INCREASING TO 25 KNOTS IN THE LATE MORNING AND AFTERNOON. SLIGHT
CHANCE OF RAIN IN THE AFTERNOON. WAVES 3 TO 5 FEET. WAVES
OCCASIONALLY TO 7 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ142-221000-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
1143 PM CDT TUE APR 21 2026
REST OF TONIGHT
NORTH WIND 5 KNOTS LATE IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
WEDNESDAY
VARIABLE WINDS 10 KNOTS OR LESS BECOMING NORTHEAST
5 TO 10 KNOTS IN THE LATE MORNING AND AFTERNOON. SUNNY. WAVES
1 FOOT OR LESS.
WEDNESDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS IN THE LATE EVENING AND OVERNIGHT. SLIGHT CHANCE OF RAIN
IN THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS THROUGH THE NIGHT.
CHANCE OF RAIN AFTER MIDNIGHT. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET AFTER MIDNIGHT.
THURSDAY
NORTHEAST WIND 15 TO 20 KNOTS. CHANCE OF RAIN IN THE
AFTERNOON. WAVES 3 TO 5 FEET. WAVES OCCASIONALLY TO 7 FEET. A
SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ143-221000-
SILVER BAY HARBOR TO TWO HARBORS MN-
1143 PM CDT TUE APR 21 2026
REST OF TONIGHT
NORTH WIND 5 KNOTS BECOMING NORTHEAST TOWARD
DAYBREAK. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
WEDNESDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. SUNNY. WAVES 1 TO 2 FEET.
WEDNESDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS UNTIL EARLY MORNING. PARTLY CLOUDY IN THE EVENING THEN
BECOMING MOSTLY CLOUDY. WAVES 1 TO 2 FEET BUILDING TO 1 TO 3 FEET
AFTER MIDNIGHT.
THURSDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
IN THE AFTERNOON. CHANCE OF RAIN AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. WAVES 2 TO 4 FEET. A SMALL CRAFT
ADVISORY MAY BE NEEDED.
LSZ144-221000-
TWO HARBORS TO DULUTH MN-
1143 PM CDT TUE APR 21 2026
REST OF TONIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLEAR. WAVES
1 FOOT OR LESS.
WEDNESDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. SUNNY. WAVES 1 TO 2 FEET.
WEDNESDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS UNTIL EARLY MORNING. PARTLY CLOUDY IN THE EVENING THEN
BECOMING MOSTLY CLOUDY. WAVES 1 TO 3 FEET.
THURSDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
IN THE LATE MORNING AND AFTERNOON. CHANCE OF RAIN AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES 1 TO 3 FEET.
LSZ145-221000-
DULUTH MN TO PORT WING WI-
1143 PM CDT TUE APR 21 2026
REST OF TONIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLEAR. WAVES
1 FOOT OR LESS.
WEDNESDAY
NORTHEAST WIND 10 TO 15 KNOTS. SUNNY. WAVES 1 TO
2 FEET.
WEDNESDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS IN THE EVENING. PARTLY CLOUDY IN THE EVENING THEN
BECOMING MOSTLY CLOUDY. WAVES 1 TO 3 FEET.
THURSDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS.
CHANCE OF RAIN AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. WAVES 1 TO 3 FEET.
LSZ146-221000-
PORT WING TO SAND ISLAND WI-
1143 PM CDT TUE APR 21 2026
REST OF TONIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLEAR. WAVES
1 FOOT OR LESS.
WEDNESDAY
NORTHEAST WIND 10 TO 15 KNOTS. SUNNY. WAVES 1 TO
2 FEET.
WEDNESDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS. PARTLY CLOUDY
IN THE EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 1 TO 2 FEET.
THURSDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
IN THE AFTERNOON. CHANCE OF RAIN AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. WAVES 1 TO 2 FEET BUILDING TO
2 TO 4 FEET LATE IN THE AFTERNOON.
LSZ147-221000-
SAND ISLAND TO BAYFIELD WI-
1143 PM CDT TUE APR 21 2026
REST OF TONIGHT
SOUTHEAST WIND 5 KNOTS BECOMING EAST AFTER
MIDNIGHT, THEN BECOMING VARIABLE 10 KNOTS OR LESS TOWARD
DAYBREAK. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
WEDNESDAY
EAST WIND 5 KNOTS BECOMING NORTHEAST LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS BECOMING EAST
AFTER MIDNIGHT. PARTLY CLOUDY IN THE EVENING THEN BECOMING MOSTLY
CLOUDY. WAVES 1 TO 2 FEET.
THURSDAY
EAST WIND 5 TO 10 KNOTS. SLIGHT CHANCE OF RAIN IN THE
AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET LATE IN THE
AFTERNOON.
LSZ150-221000-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
1143 PM CDT TUE APR 21 2026
REST OF TONIGHT
SOUTH WIND 5 KNOTS BECOMING EAST AFTER
MIDNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
WEDNESDAY
EAST WIND 5 KNOTS BECOMING NORTHEAST IN THE
AFTERNOON. SUNNY. WAVES 1 TO 2 FEET.
WEDNESDAY NIGHT
EAST WIND 10 TO 15 KNOTS BECOMING SOUTHEAST
5 TO 10 KNOTS AFTER MIDNIGHT. SLIGHT CHANCE OF RAIN AND
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 TO 2 FEET BUILDING TO 1 TO
3 FEET IN THE LATE EVENING AND OVERNIGHT.
THURSDAY
EAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. SLIGHT CHANCE OF RAIN IN THE AFTERNOON. WAVES 3 TO
5 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ121-221000-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
1143 PM CDT TUE APR 21 2026
REST OF TONIGHT
NORTHWEST WIND 5 KNOTS LATE IN THE EVENING
BECOMING VARIABLE 10 KNOTS OR LESS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
WEDNESDAY
EAST WIND 5 KNOTS BECOMING NORTHEAST LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
NORTHEAST WIND 5 KNOTS BECOMING SOUTHEAST
AFTER MIDNIGHT. PARTLY CLOUDY IN THE EVENING THEN BECOMING MOSTLY
CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
SOUTHEAST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE AFTERNOON. SLIGHT CHANCE OF RAIN IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
LSZ148-221000-
OAK POINT TO SAXON HARBOR WI-
1143 PM CDT TUE APR 21 2026
REST OF TONIGHT
VARIABLE WINDS 10 KNOTS OR LESS BECOMING EAST
5 KNOTS TOWARD DAYBREAK. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
WEDNESDAY
EAST WIND 5 KNOTS BECOMING NORTHEAST IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS BECOMING
SOUTHEAST WITH GUSTS TO AROUND 20 KNOTS AFTER MIDNIGHT. PARTLY
CLOUDY IN THE EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 1 TO
2 FEET.
THURSDAY
SOUTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
IN THE AFTERNOON. SLIGHT CHANCE OF RAIN IN THE AFTERNOON. WAVES
1 TO 2 FEET.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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