423
FZUS53 KDLH 132023
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
323 PM CDT WED MAY 13 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.
LSZ140-140400-
GRAND PORTAGE TO GRAND MARAIS MN-
323 PM CDT WED MAY 13 2026
TONIGHT
WEST WIND 5 TO 10 KNOTS BECOMING NORTHEAST IN THE LATE
EVENING AND OVERNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
THURSDAY
EAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. MOSTLY SUNNY. WAVES 1 TO 2 FEET.
THURSDAY NIGHT
EAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING SOUTH 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS AFTER MIDNIGHT. CHANCE OF RAIN SHOWERS IN THE EVENING,
THEN RAIN SHOWERS LIKELY AFTER MIDNIGHT. WAVES 4 TO 6 FEET. WAVES
OCCASIONALLY TO 8 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
FRIDAY
SOUTHWEST WIND 20 TO 25 KNOTS WITH GUSTS TO AROUND
30 KNOTS. MOSTLY SUNNY. WAVES 4 TO 7 FEET. WAVES OCCASIONALLY TO
9 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ141-140400-
GRAND MARAIS TO TACONITE HARBOR MN-
323 PM CDT WED MAY 13 2026
TONIGHT
WEST WIND 5 KNOTS BECOMING NORTH IN THE LATE EVENING
AND EARLY MORNING, THEN BECOMING NORTHEAST LATE IN THE NIGHT.
MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
THURSDAY
EAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS LATE
IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 2 FEET.
THURSDAY NIGHT
EAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING SOUTHEAST 5 TO 10 KNOTS AFTER MIDNIGHT. CHANCE
OF RAIN SHOWERS THROUGH THE NIGHT. WAVES 2 TO 4 FEET.
FRIDAY
SOUTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. MOSTLY SUNNY. WAVES 3 TO 5 FEET. A SMALL CRAFT ADVISORY
MAY BE NEEDED.
LSZ142-140400-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
323 PM CDT WED MAY 13 2026
TONIGHT
NORTH WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
THURSDAY
NORTHEAST WIND 10 TO 15 KNOTS. MOSTLY SUNNY. WAVES
1 TO 2 FEET.
THURSDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS BECOMING SOUTH
5 TO 10 KNOTS EARLY IN THE MORNING. CHANCE OF RAIN SHOWERS
THROUGH THE NIGHT. WAVES 1 TO 3 FEET.
FRIDAY
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
INCREASING TO 25 KNOTS IN THE AFTERNOON. SUNNY. WAVES 1 TO
3 FEET.
LSZ143-140400-
SILVER BAY HARBOR TO TWO HARBORS MN-
323 PM CDT WED MAY 13 2026
TONIGHT
NORTH WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
THURSDAY
NORTHEAST WIND 15 TO 20 KNOTS. MOSTLY SUNNY. WAVES
1 TO 3 FEET.
THURSDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 20 KNOTS BECOMING SOUTH EARLY IN THE MORNING. CHANCE OF
RAIN SHOWERS THROUGH THE NIGHT. WAVES 1 TO 2 FEET BUILDING TO
2 TO 4 FEET AFTER MIDNIGHT.
FRIDAY
SOUTHWEST WIND 15 TO 20 KNOTS. GUSTS UP TO 20 KNOTS
INCREASING TO 25 KNOTS IN THE AFTERNOON. SUNNY. WAVES 2 TO
4 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ144-140400-
TWO HARBORS TO DULUTH MN-
323 PM CDT WED MAY 13 2026
TONIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
THURSDAY
NORTHEAST WIND 15 TO 20 KNOTS. SUNNY IN THE MORNING
THEN BECOMING PARTLY SUNNY. WAVES 1 TO 3 FEET.
THURSDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 20 KNOTS BECOMING SOUTH WITH GUSTS TO AROUND 20 KNOTS
AFTER MIDNIGHT. CHANCE OF RAIN SHOWERS IN THE EVENING. SLIGHT
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 TO 3 FEET BUILDING
TO 2 TO 4 FEET AFTER MIDNIGHT.
FRIDAY
SOUTHWEST WIND 20 TO 25 KNOTS. GUSTS UP TO 30 KNOTS
LATE IN THE AFTERNOON. SUNNY. WAVES 3 TO 5 FEET. A SMALL CRAFT
ADVISORY MAY BE NEEDED.
LSZ145-140400-
DULUTH MN TO PORT WING WI-
323 PM CDT WED MAY 13 2026
TONIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
THURSDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
IN THE AFTERNOON. SUNNY IN THE MORNING THEN BECOMING PARTLY
SUNNY. WAVES 1 TO 2 FEET BUILDING TO 1 TO 3 FEET LATE IN THE
AFTERNOON.
THURSDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS BECOMING SOUTH
WITH GUSTS TO AROUND 25 KNOTS AFTER MIDNIGHT. CHANCE OF RAIN
SHOWERS IN THE EVENING. SLIGHT CHANCE OF RAIN SHOWERS AFTER
MIDNIGHT. WAVES 1 TO 3 FEET.
FRIDAY
SOUTHWEST WIND 20 TO 25 KNOTS. GUSTS UP TO 25 KNOTS
INCREASING TO 30 KNOTS IN THE AFTERNOON. SUNNY. WAVES 1 TO 3 FEET
BUILDING TO 3 TO 5 FEET IN THE LATE MORNING AND AFTERNOON. A
SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ146-140400-
PORT WING TO SAND ISLAND WI-
323 PM CDT WED MAY 13 2026
TONIGHT
NORTH WIND 5 KNOTS BECOMING NORTHEAST AFTER MIDNIGHT.
MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
THURSDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
LATE IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 2 FEET.
THURSDAY NIGHT
EAST WIND 10 KNOTS BECOMING SOUTHEAST WITH
GUSTS TO AROUND 20 KNOTS LATE IN THE EVENING, THEN BECOMING SOUTH
WITH GUSTS TO AROUND 25 KNOTS AFTER MIDNIGHT. CHANCE OF RAIN
SHOWERS. WAVES 1 TO 3 FEET.
FRIDAY
SOUTHWEST WIND 15 TO 20 KNOTS. GUSTS UP TO 20 KNOTS
INCREASING TO 25 KNOTS IN THE AFTERNOON. SUNNY. WAVES 1 TO 3 FEET
BUILDING TO 3 TO 5 FEET IN THE AFTERNOON. A SMALL CRAFT ADVISORY
MAY BE NEEDED.
LSZ147-140400-
SAND ISLAND TO BAYFIELD WI-
323 PM CDT WED MAY 13 2026
TONIGHT
NORTHEAST WIND 5 KNOTS BECOMING NORTH IN THE LATE
EVENING AND EARLY MORNING, THEN BECOMING EAST LATE IN THE NIGHT.
CLEAR. WAVES 1 FOOT OR LESS.
THURSDAY
EAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS LATE
IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 2 FEET.
THURSDAY NIGHT
SOUTHEAST WIND 10 KNOTS BECOMING SOUTH WITH
GUSTS TO AROUND 25 KNOTS IN THE LATE EVENING AND OVERNIGHT.
CHANCE OF RAIN SHOWERS THROUGH THE NIGHT. WAVES 1 TO 2 FEET.
FRIDAY
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
25 KNOTS. SUNNY. WAVES 1 TO 2 FEET BUILDING TO 1 TO 3 FEET LATE
IN THE AFTERNOON.
LSZ150-140400-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
323 PM CDT WED MAY 13 2026
TONIGHT
SOUTH WIND 5 KNOTS BECOMING EAST AFTER MIDNIGHT.
CLEAR. WAVES 1 FOOT OR LESS.
THURSDAY
EAST WIND 15 TO 20 KNOTS. MOSTLY SUNNY. WAVES 1 TO
2 FEET.
THURSDAY NIGHT
SOUTH WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
25 KNOTS RISING TO 15 TO 20 KNOTS WITH GUSTS TO AROUND 25 KNOTS
EARLY IN THE MORNING. CHANCE OF RAIN SHOWERS THROUGH THE NIGHT.
WAVES 1 TO 2 FEET BUILDING TO 3 TO 5 FEET IN THE LATE EVENING AND
OVERNIGHT. A SMALL CRAFT ADVISORY MAY BE NEEDED.
FRIDAY
SOUTHWEST WIND 15 TO 20 KNOTS. GUSTS UP TO 25 KNOTS
EARLY IN THE MORNING THEN 25 KNOTS IN THE AFTERNOON. SUNNY. WAVES
3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET EARLY IN THE AFTERNOON, THEN
BUILDING TO 2 TO 4 FEET LATE IN THE AFTERNOON. A SMALL CRAFT
ADVISORY MAY BE NEEDED.
LSZ121-140400-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
323 PM CDT WED MAY 13 2026
TONIGHT
SOUTHEAST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
THURSDAY
EAST WIND 5 TO 10 KNOTS RISING TO 10 TO 15 KNOTS WITH
GUSTS TO AROUND 20 KNOTS IN THE AFTERNOON. SUNNY. WAVES 1 TO
2 FEET.
THURSDAY NIGHT
SOUTH WIND 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS RISING TO 10 TO 15 KNOTS WITH GUSTS TO AROUND 25 KNOTS
IN THE LATE EVENING AND OVERNIGHT. CHANCE OF RAIN SHOWERS THROUGH
THE NIGHT. WAVES 1 TO 2 FEET.
FRIDAY
SOUTHWEST WIND 15 TO 20 KNOTS. GUSTS UP TO 25 KNOTS.
SUNNY. WAVES 1 TO 2 FEET.
LSZ148-140400-
OAK POINT TO SAXON HARBOR WI-
323 PM CDT WED MAY 13 2026
TONIGHT
SOUTHEAST WIND 5 KNOTS. CLEAR. WAVES 1 FOOT OR LESS.
THURSDAY
EAST WIND 5 TO 10 KNOTS RISING TO 10 TO 15 KNOTS WITH
GUSTS TO AROUND 20 KNOTS IN THE AFTERNOON. SUNNY. WAVES 1 TO
2 FEET.
THURSDAY NIGHT
SOUTH WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
30 KNOTS. CHANCE OF RAIN SHOWERS THROUGH THE NIGHT. WAVES 1 TO
3 FEET.
FRIDAY
SOUTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS. SUNNY. WAVES 1 TO 3 FEET.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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