368
FZUS53 KDLH 211311
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
811 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.
LSZ140-212200-
GRAND PORTAGE TO GRAND MARAIS MN-
811 AM CDT THU MAY 21 2026
REST OF 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
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
EAST WIND 15 TO 20 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS AFTER MIDNIGHT. CHANCE OF RAIN SHOWERS
AFTER MIDNIGHT. WAVES 3 TO 5 FEET. A SMALL CRAFT ADVISORY MAY BE
NEEDED.
LSZ141-212200-
GRAND MARAIS TO TACONITE HARBOR MN-
811 AM CDT THU MAY 21 2026
REST OF 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 3 FEET BUILDING TO 3 TO 5 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. CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
WAVES 3 TO 5 FEET. WAVES OCCASIONALLY TO 7 FEET. A SMALL CRAFT
ADVISORY MAY BE NEEDED.
LSZ142-212200-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
811 AM CDT THU MAY 21 2026
REST OF TODAY
NORTHEAST 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
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 EASING TO 5 TO 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS EARLY IN THE MORNING. SLIGHT CHANCE OF RAIN SHOWERS IN
THE EVENING, THEN RAIN SHOWERS LIKELY AFTER MIDNIGHT. WAVES 3 TO
5 FEET. WAVES OCCASIONALLY TO 7 FEET. A SMALL CRAFT ADVISORY MAY
BE NEEDED.
LSZ143-212200-
SILVER BAY HARBOR TO TWO HARBORS MN-
811 AM CDT THU MAY 21 2026
REST OF TODAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS LATE. 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. 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. GUSTS UP TO
25 KNOTS DECREASING TO 20 KNOTS AFTER MIDNIGHT. SLIGHT CHANCE OF
RAIN SHOWERS IN THE EVENING, THEN RAIN SHOWERS LIKELY AFTER
MIDNIGHT. WAVES 3 TO 5 FEET. WAVES OCCASIONALLY TO 7 FEET. A
SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ144-212200-
TWO HARBORS TO DULUTH MN-
811 AM CDT THU MAY 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM CDT THIS AFTERNOON
THROUGH THIS EVENING...
REST OF TODAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
25 KNOTS. MOSTLY SUNNY. WAVES 1 TO 3 FEET.
TONIGHT
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS EASING TO 5 TO 10 KNOTS AFTER MIDNIGHT. PARTLY CLOUDY IN
THE EVENING THEN BECOMING MOSTLY 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 3 TO 5 FEET
IN THE AFTERNOON. WAVES OCCASIONALLY TO 7 FEET. A SMALL CRAFT
ADVISORY MAY BE NEEDED.
FRIDAY NIGHT
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO
25 KNOTS DECREASING TO 20 KNOTS AFTER MIDNIGHT. CHANCE OF RAIN
SHOWERS THROUGH THE NIGHT. WAVES 3 TO 5 FEET. WAVES OCCASIONALLY
TO 7 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ145-212200-
DULUTH MN TO PORT WING WI-
811 AM CDT THU MAY 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM CDT THIS AFTERNOON
THROUGH THIS EVENING...
REST OF TODAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
25 KNOTS LATE. MOSTLY SUNNY. WAVES 1 TO 2 FEET BUILDING TO 1 TO
3 FEET LATE.
TONIGHT
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS EASING TO 5 TO 10 KNOTS AFTER MIDNIGHT. PARTLY CLOUDY IN
THE EVENING THEN BECOMING MOSTLY CLOUDY. WAVES 2 TO 4 FEET
SUBSIDING TO 1 TO 3 FEET IN THE LATE EVENING AND OVERNIGHT.
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. WAVES OCCASIONALLY TO 7 FEET. A SMALL CRAFT
ADVISORY MAY BE NEEDED.
FRIDAY NIGHT
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO
25 KNOTS DECREASING TO 20 KNOTS AFTER MIDNIGHT. CHANCE OF RAIN
SHOWERS THROUGH THE NIGHT. WAVES 3 TO 5 FEET. WAVES OCCASIONALLY
TO 7 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ146-212200-
PORT WING TO SAND ISLAND WI-
811 AM CDT THU MAY 21 2026
REST OF TODAY
EAST WIND 5 KNOTS BECOMING NORTHEAST 10 TO
15 KNOTS WITH GUSTS TO AROUND 20 KNOTS IN THE LATE MORNING AND
AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 3 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 3 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.
FRIDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS IN THE EVENING. SLIGHT CHANCE OF RAIN SHOWERS IN THE
EVENING, THEN RAIN SHOWERS LIKELY AFTER MIDNIGHT. WAVES 3 TO
5 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ147-212200-
SAND ISLAND TO BAYFIELD WI-
811 AM CDT THU MAY 21 2026
REST OF TODAY
SOUTHEAST WIND 5 KNOTS BECOMING NORTHEAST 10 TO
15 KNOTS IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 2 FEET.
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING NORTH 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. MOSTLY SUNNY. WAVES 1 TO
2 FEET BUILDING TO 2 TO 4 FEET LATE IN THE AFTERNOON. A SMALL
CRAFT ADVISORY MAY BE NEEDED.
FRIDAY NIGHT
EAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS IN
THE EVENING. 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.
LSZ150-212200-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
811 AM CDT THU MAY 21 2026
REST OF TODAY
SOUTHEAST WIND 5 KNOTS BECOMING NORTHEAST 10 TO
15 KNOTS WITH GUSTS TO AROUND 20 KNOTS IN THE AFTERNOON. SUNNY.
WAVES 1 TO 2 FEET.
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 3 FEET BUILDING TO 3 TO 5 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 AFTER MIDNIGHT. RAIN SHOWERS
LIKELY AFTER MIDNIGHT. WAVES 4 TO 6 FEET SUBSIDING TO 2 TO 4 FEET
EARLY IN THE MORNING. WAVES OCCASIONALLY TO 8 FEET. A SMALL CRAFT
ADVISORY MAY BE NEEDED.
LSZ121-212200-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
811 AM CDT THU MAY 21 2026
REST OF TODAY
SOUTH WIND 5 KNOTS BECOMING SOUTHEAST LATE IN
THE MORNING, THEN BECOMING NORTHEAST 10 TO 15 KNOTS WITH GUSTS TO
AROUND 20 KNOTS IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 TO
2 FEET.
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 3 FEET.
FRIDAY
NORTHEAST WIND 15 TO 20 KNOTS. MOSTLY SUNNY. WAVES 1 TO
2 FEET BUILDING TO 2 TO 4 FEET LATE IN THE AFTERNOON.
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 IN THE EVENING, THEN RAIN SHOWERS LIKELY AFTER
MIDNIGHT. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 2 FEET IN THE LATE
EVENING AND OVERNIGHT. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ148-212200-
OAK POINT TO SAXON HARBOR WI-
811 AM CDT THU MAY 21 2026
REST OF TODAY
SOUTH WIND 5 KNOTS BECOMING EAST LATE IN THE
MORNING, THEN BECOMING NORTHEAST 10 TO 15 KNOTS WITH GUSTS TO
AROUND 20 KNOTS IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 TO
2 FEET.
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 15 TO 20 KNOTS. MOSTLY 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 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.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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