389
FZUS53 KDLH 211836
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
135 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.
LSZ140-212200-
GRAND PORTAGE TO GRAND MARAIS MN-
135 PM CDT THU MAY 21 2026
REST OF TODAY
EAST 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
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
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.
LSZ141-212200-
GRAND MARAIS TO TACONITE HARBOR MN-
135 PM CDT THU MAY 21 2026
REST OF TODAY
EAST 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 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.
LSZ142-212200-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
135 PM CDT THU MAY 21 2026
REST OF TODAY
NORTHEAST WIND 5 TO 10 KNOTS. SUNNY. WAVES
1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS. 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 BECOMING EAST 5 TO 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS EARLY IN THE MORNING. RAIN SHOWERS AFTER MIDNIGHT. WAVES
4 TO 6 FEET. WAVES OCCASIONALLY TO 7 FEET. A SMALL CRAFT ADVISORY
MAY BE NEEDED.
LSZ143-212200-
SILVER BAY HARBOR TO TWO HARBORS MN-
135 PM CDT THU MAY 21 2026
REST OF TODAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS LATE. 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. 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 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.
LSZ144-212200-
TWO HARBORS TO DULUTH MN-
135 PM CDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING
REST OF TODAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS INCREASING TO 25 KNOTS LATE. 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. 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 3 TO 5 FEET. WAVES
OCCASIONALLY TO 7 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ145-212200-
DULUTH MN TO PORT WING WI-
135 PM CDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING
REST OF TODAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
25 KNOTS LATE. 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. 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 3 TO 5 FEET. WAVES
OCCASIONALLY TO 7 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ146-212200-
PORT WING TO SAND ISLAND WI-
135 PM CDT THU MAY 21 2026
REST OF TODAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS LATE. SUNNY. WAVES 1 TO 2 FEET BUILDING TO 1 TO 3 FEET
LATE.
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS EASING TO 5 KNOTS EARLY IN THE MORNING. 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
3 FEET BUILDING TO 2 TO 4 FEET LATE IN THE AFTERNOON.
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.
LSZ147-212200-
SAND ISLAND TO BAYFIELD WI-
135 PM CDT THU MAY 21 2026
REST OF TODAY
NORTHEAST WIND 10 TO 15 KNOTS. 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 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.
LSZ150-212200-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
135 PM CDT THU MAY 21 2026
REST OF TODAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS LATE. 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 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 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 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-
135 PM CDT THU MAY 21 2026
REST OF TODAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS LATE. 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 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.
LSZ148-212200-
OAK POINT TO SAXON HARBOR WI-
135 PM CDT THU MAY 21 2026
REST OF TODAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS LATE. 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 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.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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