823
FZUS53 KDLH 212201
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
500 PM 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.
LSZ140-220400-
GRAND PORTAGE TO GRAND MARAIS MN-
500 PM CDT THU MAY 21 2026
TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. MOSTLY CLEAR EARLY 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. MOSTLY SUNNY. WAVES 1 TO 2 FEET BUILDING TO 1 TO 3 FEET
LATE IN THE AFTERNOON.
FRIDAY NIGHT
EAST WIND 15 TO 20 KNOTS. GUSTS UP TO 30 KNOTS
DECREASING TO 20 KNOTS. CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
WAVES 3 TO 5 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
SATURDAY
EAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS IN THE
MORNING. RAIN SHOWERS. WAVES 2 TO 4 FEET.
LSZ141-220400-
GRAND MARAIS TO TACONITE HARBOR MN-
500 PM CDT THU MAY 21 2026
TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. PARTLY CLOUDY THEN
BECOMING MOSTLY CLOUDY IN THE LATE EVENING AND EARLY MORNING THEN
BECOMING 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 3 FEET BUILDING TO 2 TO 4 FEET LATE IN
THE AFTERNOON. A SMALL CRAFT ADVISORY MAY BE NEEDED.
FRIDAY NIGHT
EAST WIND 15 TO 20 KNOTS. GUSTS UP TO 30 KNOTS
DECREASING TO 20 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY AFTER
MIDNIGHT. WAVES 3 TO 5 FEET. WAVES OCCASIONALLY TO 7 FEET. A
SMALL CRAFT ADVISORY MAY BE NEEDED.
SATURDAY
EAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS UNTIL
LATE AFTERNOON. RAIN SHOWERS. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO
3 FEET LATE IN THE AFTERNOON.
LSZ142-220400-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
500 PM CDT THU MAY 21 2026
TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. PARTLY CLOUDY THEN
BECOMING MOSTLY CLOUDY IN THE LATE EVENING AND EARLY MORNING THEN
BECOMING PARTLY CLOUDY. WAVES 1 TO 2 FEET.
FRIDAY
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. MOSTLY SUNNY. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET
LATE IN THE AFTERNOON. A SMALL CRAFT ADVISORY MAY BE NEEDED.
FRIDAY NIGHT
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO
AROUND 25 KNOTS BECOMING EAST 5 TO 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS EARLY IN THE MORNING. RAIN SHOWERS AFTER MIDNIGHT. WAVES
3 TO 5 FEET. WAVES OCCASIONALLY TO 7 FEET. A SMALL CRAFT ADVISORY
MAY BE NEEDED.
SATURDAY
NORTHEAST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE MORNING. RAIN SHOWERS. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO
3 FEET IN THE AFTERNOON.
LSZ143-220400-
SILVER BAY HARBOR TO TWO HARBORS MN-
500 PM CDT THU MAY 21 2026
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS EASING TO 5 KNOTS LATE IN THE NIGHT. MOSTLY CLOUDY UNTIL
EARLY MORNING THEN BECOMING PARTLY CLOUDY. WAVES 1 TO 3 FEET.
FRIDAY
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. MOSTLY 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 WITH GUSTS TO
AROUND 25 KNOTS EASING TO 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS AFTER MIDNIGHT. CHANCE OF RAIN SHOWERS IN THE EVENING,
THEN RAIN SHOWERS AFTER MIDNIGHT. WAVES 3 TO 5 FEET. WAVES
OCCASIONALLY TO 7 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
SATURDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
EARLY IN THE MORNING. RAIN SHOWERS LIKELY IN THE MORNING, THEN
CHANCE OF RAIN SHOWERS IN THE AFTERNOON. WAVES 1 TO 3 FEET.
LSZ144-220400-
TWO HARBORS TO DULUTH MN-
500 PM CDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING
TONIGHT
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS EASING TO 5 TO 10 KNOTS AFTER MIDNIGHT. MOSTLY CLOUDY.
WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 2 FEET AFTER MIDNIGHT.
FRIDAY
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. MOSTLY SUNNY. WAVES 1 TO 2 FEET BUILDING TO 3 TO 5 FEET
IN THE AFTERNOON. A SMALL CRAFT ADVISORY MAY BE NEEDED.
FRIDAY NIGHT
NORTHEAST WIND 20 TO 25 KNOTS WITH GUSTS TO
AROUND 30 KNOTS EASING TO 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS AFTER MIDNIGHT. CHANCE OF RAIN SHOWERS IN THE EVENING,
THEN RAIN SHOWERS AFTER MIDNIGHT. WAVES 4 TO 6 FEET. WAVES
OCCASIONALLY TO 7 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
SATURDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
IN THE MORNING. RAIN SHOWERS LIKELY. WAVES 1 TO 3 FEET.
LSZ145-220400-
DULUTH MN TO PORT WING WI-
500 PM CDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING
TONIGHT
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS EASING TO 5 TO 10 KNOTS AFTER MIDNIGHT. MOSTLY CLOUDY
THEN BECOMING PARTLY CLOUDY LATE IN THE EVENING THEN BECOMING
MOSTLY CLOUDY. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 2 FEET AFTER
MIDNIGHT.
FRIDAY
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. MOSTLY SUNNY. WAVES 1 TO 3 FEET BUILDING TO 3 TO 5 FEET
IN THE AFTERNOON. WAVES OCCASIONALLY TO 7 FEET. A SMALL CRAFT
ADVISORY MAY BE NEEDED.
FRIDAY NIGHT
NORTHEAST WIND 20 TO 25 KNOTS WITH GUSTS TO
AROUND 30 KNOTS EASING TO 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS AFTER MIDNIGHT. CHANCE OF RAIN SHOWERS IN THE EVENING,
THEN RAIN SHOWERS AFTER MIDNIGHT. WAVES 4 TO 6 FEET SUBSIDING TO
1 TO 3 FEET EARLY IN THE MORNING. WAVES OCCASIONALLY TO 7 FEET. A
SMALL CRAFT ADVISORY MAY BE NEEDED.
SATURDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
IN THE MORNING. RAIN SHOWERS IN THE MORNING, THEN RAIN SHOWERS
LIKELY IN THE AFTERNOON. WAVES 1 TO 3 FEET.
LSZ146-220400-
PORT WING TO SAND ISLAND WI-
500 PM CDT THU MAY 21 2026
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS EASING TO 5 KNOTS LATE IN THE NIGHT. MOSTLY CLOUDY.
WAVES 1 TO 3 FEET SUBSIDING TO 1 TO 2 FEET IN THE LATE EVENING
AND OVERNIGHT.
FRIDAY
NORTHEAST WIND 15 TO 20 KNOTS. MOSTLY 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 BECOMING EAST 5 TO
10 KNOTS AFTER MIDNIGHT. RAIN SHOWERS AFTER MIDNIGHT. WAVES 3 TO
5 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
SATURDAY
NORTHEAST WIND 5 TO 10 KNOTS. RAIN SHOWERS LIKELY IN
THE MORNING, THEN SLIGHT CHANCE OF RAIN SHOWERS IN THE AFTERNOON.
WAVES 1 TO 2 FEET.
LSZ147-220400-
SAND ISLAND TO BAYFIELD WI-
500 PM CDT THU MAY 21 2026
TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING NORTH LATE IN THE NIGHT. PARTLY CLOUDY IN THE
EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 1 TO 2 FEET.
FRIDAY
NORTHEAST WIND 15 TO 20 KNOTS. MOSTLY SUNNY. WAVES 1 TO
3 FEET BUILDING TO 2 TO 4 FEET LATE IN THE AFTERNOON. A SMALL
CRAFT ADVISORY MAY BE NEEDED.
FRIDAY NIGHT
EAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS EASING TO 5 TO 10 KNOTS WITH GUSTS TO AROUND 20 KNOTS IN
THE LATE EVENING AND OVERNIGHT. RAIN SHOWERS LIKELY AFTER
MIDNIGHT. WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET EARLY IN THE
MORNING. A SMALL CRAFT ADVISORY MAY BE NEEDED.
SATURDAY
EAST WIND 5 TO 10 KNOTS. RAIN SHOWERS THROUGH THE
DAY. WAVES 1 TO 2 FEET.
LSZ150-220400-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
500 PM CDT THU MAY 21 2026
TONIGHT
EAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND 20 KNOTS
BECOMING SOUTHEAST 5 TO 10 KNOTS AFTER MIDNIGHT. PARTLY CLOUDY IN
THE EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 1 TO 3 FEET.
FRIDAY
EAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND 25 KNOTS.
MOSTLY SUNNY. WAVES 1 TO 2 FEET BUILDING TO 3 TO 5 FEET IN THE
AFTERNOON. A SMALL CRAFT ADVISORY MAY BE NEEDED.
FRIDAY NIGHT
EAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS EASING TO 5 TO 10 KNOTS WITH GUSTS TO AROUND 20 KNOTS
AFTER MIDNIGHT. RAIN SHOWERS LIKELY AFTER MIDNIGHT. WAVES 4 TO
6 FEET. WAVES OCCASIONALLY TO 7 FEET. A SMALL CRAFT ADVISORY MAY
BE NEEDED.
SATURDAY
EAST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS EARLY
IN THE MORNING. RAIN SHOWERS LIKELY IN THE MORNING, THEN SLIGHT
CHANCE OF RAIN SHOWERS IN THE AFTERNOON. WAVES 1 TO 3 FEET.
LSZ121-220400-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
500 PM CDT THU MAY 21 2026
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING SOUTH 5 KNOTS AFTER MIDNIGHT. PARTLY CLOUDY IN
THE EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 1 TO 2 FEET.
FRIDAY
NORTHEAST WIND 15 TO 20 KNOTS. MOSTLY SUNNY. WAVES 1 TO
2 FEET.
FRIDAY NIGHT
EAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS EASING TO 5 KNOTS EARLY IN THE MORNING. SLIGHT CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 TO 2 FEET.
SATURDAY
EAST WIND 5 KNOTS. RAIN SHOWERS LIKELY IN THE
MORNING, THEN SLIGHT CHANCE OF RAIN SHOWERS IN THE AFTERNOON.
WAVES 1 FOOT OR LESS.
LSZ148-220400-
OAK POINT TO SAXON HARBOR WI-
500 PM CDT THU MAY 21 2026
TONIGHT
EAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND 20 KNOTS
BECOMING SOUTHEAST 5 KNOTS AFTER MIDNIGHT. PARTLY CLOUDY IN THE
EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 1 TO 3 FEET.
FRIDAY
NORTHEAST WIND 5 TO 10 KNOTS RISING TO 15 TO 20 KNOTS
IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 3 FEET BUILDING TO
2 TO 4 FEET LATE IN THE AFTERNOON.
FRIDAY NIGHT
EAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
EARLY IN THE EVENING. RAIN SHOWERS LIKELY AFTER MIDNIGHT. WAVES
2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET AFTER MIDNIGHT. A SMALL
CRAFT ADVISORY MAY BE NEEDED.
SATURDAY
EAST WIND 5 TO 10 KNOTS. RAIN SHOWERS LIKELY IN THE
MORNING, THEN CHANCE OF RAIN SHOWERS IN THE AFTERNOON. WAVES 1 TO
2 FEET.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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