987
FZUS53 KDLH 210537
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
1237 AM CDT THU MAY 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.
LSZ140-211600-
GRAND PORTAGE TO GRAND MARAIS MN-
1237 AM CDT THU MAY 21 2026
TODAY
SOUTHEAST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR
LESS.
TONIGHT
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.
FRIDAY NIGHT
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO
25 KNOTS DECREASING TO 20 KNOTS AFTER MIDNIGHT. SLIGHT CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. WAVES 2 TO 4 FEET.
LSZ141-211600-
GRAND MARAIS TO TACONITE HARBOR MN-
1237 AM CDT THU MAY 21 2026
TODAY
EAST WIND 5 TO 10 KNOTS. MOSTLY SUNNY. WAVES 1 FOOT OR
LESS.
TONIGHT
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.
FRIDAY NIGHT
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO
25 KNOTS DECREASING TO 20 KNOTS AFTER MIDNIGHT. CHANCE OF RAIN
SHOWERS AFTER MIDNIGHT. WAVES 2 TO 4 FEET.
LSZ142-211600-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
1237 AM CDT THU MAY 21 2026
TODAY
NORTHEAST WIND 5 TO 10 KNOTS. MOSTLY SUNNY. WAVES 1 FOOT
OR LESS.
TONIGHT
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.
FRIDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
25 KNOTS DECREASING TO 20 KNOTS IN THE LATE EVENING AND
OVERNIGHT. CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES 2 TO
4 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ143-211600-
SILVER BAY HARBOR TO TWO HARBORS MN-
1237 AM CDT THU MAY 21 2026
TODAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS
EARLY IN THE EVENING. 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.
FRIDAY NIGHT
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO
25 KNOTS DECREASING TO 20 KNOTS IN THE LATE EVENING AND
OVERNIGHT. CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES 2 TO
4 FEET.
LSZ144-211600-
TWO HARBORS TO DULUTH MN-
1237 AM CDT THU MAY 21 2026
TODAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. MOSTLY SUNNY. WAVES 1 TO 2 FEET.
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS EASING TO 5 KNOTS EARLY IN THE MORNING. PARTLY CLOUDY IN
THE EVENING THEN BECOMING MOSTLY 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.
FRIDAY NIGHT
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO
25 KNOTS EARLY IN THE EVENING. SLIGHT CHANCE OF RAIN SHOWERS IN
THE EVENING, THEN CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES
2 TO 4 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ145-211600-
DULUTH MN TO PORT WING WI-
1237 AM CDT THU MAY 21 2026
TODAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. MOSTLY SUNNY. WAVES 1 TO 2 FEET.
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS EASING TO 5 KNOTS EARLY IN THE MORNING. PARTLY CLOUDY IN
THE EVENING THEN BECOMING MOSTLY 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.
FRIDAY NIGHT
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO
25 KNOTS EARLY IN THE EVENING. SLIGHT CHANCE OF RAIN SHOWERS IN
THE EVENING, THEN CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES
2 TO 4 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ146-211600-
PORT WING TO SAND ISLAND WI-
1237 AM CDT THU MAY 21 2026
TODAY
NORTHEAST WIND 5 TO 10 KNOTS RISING TO 10 TO 15 KNOTS
WITH GUSTS TO AROUND 20 KNOTS IN THE AFTERNOON. MOSTLY SUNNY.
WAVES 1 FOOT OR LESS.
TONIGHT
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.
FRIDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS EARLY IN THE EVENING. CHANCE OF RAIN SHOWERS AFTER
MIDNIGHT. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET EARLY IN THE
MORNING.
LSZ147-211600-
SAND ISLAND TO BAYFIELD WI-
1237 AM CDT THU MAY 21 2026
TODAY
VARIABLE WINDS 10 KNOTS OR LESS BECOMING SOUTHEAST
5 KNOTS LATE IN THE MORNING, THEN BECOMING EAST IN THE AFTERNOON.
MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTHEAST AFTER
MIDNIGHT, THEN BECOMING VARIABLE 10 KNOTS OR LESS 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.
FRIDAY NIGHT
EAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
EARLY IN THE EVENING. CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 2 FEET EARLY IN THE MORNING.
LSZ150-211600-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
1237 AM CDT THU MAY 21 2026
TODAY
SOUTHEAST WIND 5 KNOTS BECOMING EAST IN THE AFTERNOON.
SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
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. GUSTS UP TO 25 KNOTS. PARTLY
SUNNY. WAVES 1 TO 2 FEET BUILDING TO 2 TO 4 FEET LATE IN THE
AFTERNOON.
FRIDAY NIGHT
EAST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS.
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES 2 TO 4 FEET. A SMALL
CRAFT ADVISORY MAY BE NEEDED.
LSZ121-211600-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
1237 AM CDT THU MAY 21 2026
TODAY
SOUTHEAST WIND 5 KNOTS BECOMING NORTHEAST 10 TO 15 KNOTS
IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTH AFTER
MIDNIGHT, THEN BECOMING VARIABLE 10 KNOTS OR LESS 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 2 FEET.
FRIDAY NIGHT
EAST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS
AFTER MIDNIGHT. WAVES 1 TO 2 FEET.
LSZ148-211600-
OAK POINT TO SAXON HARBOR WI-
1237 AM CDT THU MAY 21 2026
TODAY
SOUTH WIND 5 KNOTS BECOMING EAST LATE IN THE MORNING,
THEN BECOMING NORTHEAST 10 TO 15 KNOTS IN THE AFTERNOON. MOSTLY
SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
EAST WIND 5 TO 10 KNOTS BECOMING SOUTH AFTER MIDNIGHT.
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.
FRIDAY NIGHT
EAST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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