630
FZUS53 KDLH 201941
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
240 PM CDT WED MAY 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.
LSZ140-210400-
GRAND PORTAGE TO GRAND MARAIS MN-
241 PM CDT WED MAY 20 2026
TONIGHT
SOUTHWEST WIND 10 TO 15 KNOTS BECOMING WEST 5 KNOTS
AFTER MIDNIGHT. MOSTLY CLEAR. WAVES 1 TO 2 FEET.
THURSDAY
SOUTHEAST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR
LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. PARTLY CLOUDY.
WAVES 1 TO 2 FEET.
FRIDAY
EAST 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.
LSZ141-210400-
GRAND MARAIS TO TACONITE HARBOR MN-
241 PM CDT WED MAY 20 2026
TONIGHT
EAST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
THURSDAY
EAST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. PARTLY CLOUDY IN
THE EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 1 TO 2 FEET.
FRIDAY
EAST 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.
LSZ142-210400-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
241 PM CDT WED MAY 20 2026
TONIGHT
NORTHEAST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
THURSDAY
VARIABLE WINDS 10 KNOTS OR LESS BECOMING EAST 5 KNOTS
IN THE LATE MORNING AND AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR
LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 KNOTS. PARTLY CLOUDY IN THE
EVENING THEN BECOMING MOSTLY 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 BUILDING TO 1 TO 3 FEET
LATE IN THE AFTERNOON.
LSZ143-210400-
SILVER BAY HARBOR TO TWO HARBORS MN-
241 PM CDT WED MAY 20 2026
TONIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
THURSDAY
NORTHEAST WIND 5 TO 10 KNOTS. MOSTLY SUNNY. WAVES
1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. PARTLY CLOUDY IN
THE EVENING THEN BECOMING MOSTLY 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.
LSZ144-210400-
TWO HARBORS TO DULUTH MN-
241 PM CDT WED MAY 20 2026
TONIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
THURSDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. SUNNY. WAVES 1 TO 2 FEET.
THURSDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 20 KNOTS EASING TO 5 KNOTS EARLY IN THE MORNING. PARTLY
CLOUDY. WAVES 1 TO 2 FEET.
FRIDAY
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. PARTLY SUNNY. WAVES 1 TO 2 FEET BUILDING TO 2 TO 4 FEET
IN THE AFTERNOON. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ145-210400-
DULUTH MN TO PORT WING WI-
241 PM CDT WED MAY 20 2026
TONIGHT
EAST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
THURSDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. MOSTLY SUNNY. WAVES 1 TO 2 FEET.
THURSDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 20 KNOTS EASING TO 5 KNOTS EARLY IN THE MORNING. PARTLY
CLOUDY. WAVES 1 TO 2 FEET.
FRIDAY
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. PARTLY SUNNY. WAVES 1 TO 2 FEET BUILDING TO 2 TO 4 FEET
IN THE AFTERNOON. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ146-210400-
PORT WING TO SAND ISLAND WI-
241 PM CDT WED MAY 20 2026
TONIGHT
EAST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
THURSDAY
VARIABLE WINDS 10 KNOTS OR LESS BECOMING NORTHEAST
5 TO 10 KNOTS WITH GUSTS TO AROUND 20 KNOTS IN THE LATE MORNING
AND AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. PARTLY CLOUDY IN
THE EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. PARTLY SUNNY. WAVES 1 TO 2 FEET.
LSZ147-210400-
SAND ISLAND TO BAYFIELD WI-
241 PM CDT WED MAY 20 2026
TONIGHT
SOUTHEAST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
THURSDAY
SOUTHEAST WIND 5 KNOTS BECOMING EAST IN THE LATE
MORNING AND AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
EAST WIND 5 TO 10 KNOTS BECOMING NORTH EARLY IN
THE MORNING. PARTLY CLOUDY IN THE EVENING THEN BECOMING MOSTLY
CLOUDY. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. PARTLY SUNNY. WAVES 1 TO 3 FEET.
LSZ150-210400-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
241 PM CDT WED MAY 20 2026
TONIGHT
SOUTHEAST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
THURSDAY
SOUTHEAST WIND 5 KNOTS BECOMING EAST IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
EAST WIND 5 TO 10 KNOTS BECOMING SOUTHEAST
AFTER MIDNIGHT. PARTLY CLOUDY IN THE EVENING THEN BECOMING MOSTLY
CLOUDY. WAVES 1 TO 2 FEET.
FRIDAY
EAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND 25 KNOTS.
PARTLY SUNNY. WAVES 1 TO 2 FEET BUILDING TO 2 TO 4 FEET LATE IN
THE AFTERNOON.
LSZ121-210400-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
241 PM CDT WED MAY 20 2026
TONIGHT
EAST WIND 5 KNOTS UNTIL EARLY MORNING BECOMING
VARIABLE 10 KNOTS OR LESS. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
THURSDAY
SOUTH WIND 5 KNOTS BECOMING EAST IN THE AFTERNOON.
MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTH
AFTER MIDNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. PARTLY SUNNY. WAVES 1 TO 2 FEET.
LSZ148-210400-
OAK POINT TO SAXON HARBOR WI-
241 PM CDT WED MAY 20 2026
TONIGHT
EAST WIND 5 KNOTS BECOMING SOUTH LATE IN THE NIGHT.
MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
THURSDAY
SOUTH WIND 5 KNOTS BECOMING EAST IN THE AFTERNOON.
MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
EAST WIND 5 TO 10 KNOTS BECOMING SOUTH AFTER
MIDNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. PARTLY SUNNY. WAVES 1 TO 3 FEET.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page