640
FZUS53 KDLH 070821
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
321 AM CDT TUE APR 7 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.
LSZ140-071600-
GRAND PORTAGE TO GRAND MARAIS MN-
321 AM CDT TUE APR 7 2026
TODAY
WEST WIND 10 TO 15 KNOTS BECOMING SOUTHWEST 15 TO
20 KNOTS IN THE AFTERNOON. SUNNY. WAVES 1 TO 3 FEET.
TONIGHT
SOUTH WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS RISING TO 15 TO 20 KNOTS WITH GUSTS TO AROUND 25 KNOTS
IN THE LATE EVENING AND OVERNIGHT. SLIGHT CHANCE OF SNOW AFTER
MIDNIGHT. WAVES 1 TO 3 FEET BUILDING TO 3 TO 5 FEET AFTER
MIDNIGHT. A SMALL CRAFT ADVISORY MAY BE NEEDED.
WEDNESDAY
SOUTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS LATE IN THE AFTERNOON. RAIN LIKELY AND
SLIGHT CHANCE OF LIGHT FREEZING RAIN IN THE MORNING. SNOW LIKELY
THROUGH THE DAY. RAIN WITH LIGHT FREEZING RAIN LIKELY IN THE
AFTERNOON. WAVES 3 TO 5 FEET. WAVES OCCASIONALLY TO 7 FEET. A
SMALL CRAFT ADVISORY MAY BE NEEDED.
WEDNESDAY NIGHT
SOUTHWEST WIND 15 TO 20 KNOTS. GUSTS UP TO
20 KNOTS INCREASING TO 30 KNOTS. CHANCE OF RAIN THROUGH THE
NIGHT. WAVES 4 TO 6 FEET. WAVES OCCASIONALLY TO 7 FEET. A SMALL
CRAFT ADVISORY MAY BE NEEDED.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ141-071600-
GRAND MARAIS TO TACONITE HARBOR MN-
321 AM CDT TUE APR 7 2026
TODAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE LATE MORNING
AND AFTERNOON. SUNNY. WAVES 1 TO 2 FEET.
TONIGHT
SOUTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. SLIGHT CHANCE OF SNOW AFTER MIDNIGHT. WAVES 1 TO
3 FEET.
WEDNESDAY
SOUTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
UNTIL LATE AFTERNOON. SNOW, RAIN LIKELY AND SLIGHT CHANCE OF
LIGHT FREEZING RAIN IN THE MORNING, THEN RAIN AND SLIGHT CHANCE
OF SNOW IN THE AFTERNOON. WAVES 2 TO 4 FEET. A SMALL CRAFT
ADVISORY MAY BE NEEDED.
WEDNESDAY NIGHT
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO
25 KNOTS. RAIN IN THE EVENING. WAVES 2 TO 4 FEET SUBSIDING TO
1 TO 3 FEET AFTER MIDNIGHT, THEN BUILDING TO 2 TO 4 FEET EARLY IN
THE MORNING. A SMALL CRAFT ADVISORY MAY BE NEEDED.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ142-071600-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
321 AM CDT TUE APR 7 2026
TODAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE LATE MORNING
AND AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTH AFTER
MIDNIGHT. CHANCE OF SNOW AFTER MIDNIGHT. WAVES 1 TO 2 FEET.
WEDNESDAY
SOUTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTH LATE IN
THE AFTERNOON. RAIN, SNOW AND LIGHT FREEZING RAIN LIKELY IN THE
MORNING, THEN RAIN AND SLIGHT CHANCE OF SNOW IN THE AFTERNOON.
WAVES 1 TO 3 FEET.
WEDNESDAY NIGHT
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO
25 KNOTS. RAIN IN THE EVENING. WAVES 1 TO 3 FEET.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ143-071600-
SILVER BAY HARBOR TO TWO HARBORS MN-
321 AM CDT TUE APR 7 2026
TODAY
WEST WIND 5 KNOTS BECOMING SOUTH LATE IN THE AFTERNOON.
SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
EAST WIND 5 TO 10 KNOTS BECOMING SOUTH 10 TO 15 KNOTS
AFTER MIDNIGHT. CHANCE OF SNOW AFTER MIDNIGHT. WAVES 1 TO 2 FEET.
WEDNESDAY
SOUTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST LATE
IN THE AFTERNOON. RAIN LIKELY, CHANCE OF SNOW AND LIGHT FREEZING
RAIN LIKELY IN THE MORNING, THEN RAIN IN THE AFTERNOON. WAVES
1 TO 2 FEET.
WEDNESDAY NIGHT
SOUTHWEST WIND 15 TO 20 KNOTS. GUSTS UP TO
25 KNOTS. RAIN IN THE EVENING. WAVES 1 TO 3 FEET.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ144-071600-
TWO HARBORS TO DULUTH MN-
321 AM CDT TUE APR 7 2026
TODAY
WEST WIND 5 KNOTS BECOMING SOUTHEAST LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
EAST WIND 5 TO 10 KNOTS BECOMING SOUTH 10 TO 15 KNOTS
WITH GUSTS TO AROUND 20 KNOTS EARLY IN THE MORNING. CHANCE OF
RAIN AND SNOW AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
WEDNESDAY
SOUTH WIND 10 TO 15 KNOTS BECOMING SOUTHWEST LATE IN
THE AFTERNOON. GUSTS UP TO 20 KNOTS. RAIN LIKELY IN THE MORNING,
THEN RAIN IN THE AFTERNOON. WAVES 1 TO 3 FEET.
WEDNESDAY NIGHT
WEST WIND 15 TO 20 KNOTS. GUSTS UP TO 25 KNOTS
AFTER MIDNIGHT. RAIN IN THE EVENING. WAVES 1 TO 3 FEET.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ145-071600-
DULUTH MN TO PORT WING WI-
321 AM CDT TUE APR 7 2026
TODAY
SOUTHWEST WIND 5 KNOTS BECOMING SOUTHEAST LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
EAST WIND 5 TO 10 KNOTS BECOMING SOUTH 15 TO 20 KNOTS
WITH GUSTS TO AROUND 25 KNOTS IN THE LATE EVENING AND OVERNIGHT.
CHANCE OF RAIN AFTER MIDNIGHT. WAVES 1 TO 2 FEET.
WEDNESDAY
SOUTH WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS BECOMING SOUTHWEST 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS LATE IN THE AFTERNOON. CHANCE OF RAIN IN THE MORNING,
THEN RAIN IN THE AFTERNOON. WAVES 1 TO 2 FEET.
WEDNESDAY NIGHT
SOUTHWEST WIND 15 TO 20 KNOTS. GUSTS UP TO
20 KNOTS INCREASING TO 25 KNOTS IN THE LATE EVENING AND
OVERNIGHT. RAIN IN THE EVENING. WAVES 1 TO 2 FEET BUILDING TO
2 TO 4 FEET IN THE LATE EVENING AND OVERNIGHT. A SMALL CRAFT
ADVISORY MAY BE NEEDED.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ146-071600-
PORT WING TO SAND ISLAND WI-
321 AM CDT TUE APR 7 2026
TODAY
SOUTHWEST WIND 5 KNOTS BECOMING SOUTHEAST LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
EAST WIND 5 KNOTS BECOMING SOUTH WITH GUSTS TO AROUND
20 KNOTS IN THE LATE EVENING AND OVERNIGHT. CHANCE OF SNOW AFTER
MIDNIGHT. WAVES 1 FOOT OR LESS.
WEDNESDAY
SOUTH WIND 5 TO 10 KNOTS BECOMING SOUTHWEST 10 TO
15 KNOTS LATE IN THE AFTERNOON. CHANCE OF RAIN IN THE MORNING,
THEN RAIN IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
SOUTHWEST WIND 15 TO 20 KNOTS. GUSTS UP TO
20 KNOTS INCREASING TO 25 KNOTS IN THE LATE EVENING AND
OVERNIGHT. RAIN IN THE EVENING. WAVES 1 TO 2 FEET BUILDING TO
3 TO 5 FEET IN THE LATE EVENING AND OVERNIGHT. A SMALL CRAFT
ADVISORY MAY BE NEEDED.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ147-071600-
SAND ISLAND TO BAYFIELD WI-
321 AM CDT TUE APR 7 2026
TODAY
SOUTHWEST WIND 5 KNOTS BECOMING SOUTH LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTH 10 TO
15 KNOTS WITH GUSTS TO AROUND 20 KNOTS AFTER MIDNIGHT. CHANCE OF
SNOW AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
WEDNESDAY
SOUTH WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING SOUTHWEST LATE IN THE AFTERNOON. CHANCE OF RAIN
IN THE MORNING, THEN RAIN IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
SOUTHWEST WIND 15 TO 20 KNOTS. GUSTS UP TO
20 KNOTS INCREASING TO 25 KNOTS AFTER MIDNIGHT. RAIN IN THE
EVENING. WAVES 1 TO 2 FEET BUILDING TO 2 TO 4 FEET AFTER
MIDNIGHT. A SMALL CRAFT ADVISORY MAY BE NEEDED.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ150-071600-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
321 AM CDT TUE APR 7 2026
TODAY
WEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTH 15 TO
20 KNOTS AFTER MIDNIGHT. CHANCE OF SNOW AFTER MIDNIGHT. WAVES
1 TO 2 FEET BUILDING TO 1 TO 3 FEET EARLY IN THE MORNING.
WEDNESDAY
SOUTH WIND 15 TO 20 KNOTS BECOMING SOUTHWEST 10 TO
15 KNOTS LATE IN THE AFTERNOON. CHANCE OF RAIN IN THE MORNING,
THEN RAIN IN THE AFTERNOON. WAVES 1 TO 3 FEET.
WEDNESDAY NIGHT
SOUTHWEST WIND 15 TO 20 KNOTS. GUSTS UP TO
20 KNOTS INCREASING TO 25 KNOTS AFTER MIDNIGHT. RAIN IN THE
EVENING. WAVES 1 TO 3 FEET SUBSIDING TO 1 TO 2 FEET LATE IN THE
EVENING, THEN BUILDING TO 3 TO 5 FEET AFTER MIDNIGHT. A SMALL
CRAFT ADVISORY MAY BE NEEDED.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ148-071600-
OAK POINT TO SAXON HARBOR WI-
321 AM CDT TUE APR 7 2026
TODAY
SOUTHWEST WIND 5 KNOTS BECOMING SOUTHEAST LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
EAST WIND 5 KNOTS BECOMING SOUTH 15 TO 20 KNOTS WITH
GUSTS TO AROUND 25 KNOTS IN THE LATE EVENING AND OVERNIGHT.
CHANCE OF RAIN AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
WEDNESDAY
SOUTH WIND 15 TO 20 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS LATE IN THE AFTERNOON. CHANCE OF RAIN IN
THE MORNING, THEN RAIN IN THE AFTERNOON. WAVES 1 TO 3 FEET.
WEDNESDAY NIGHT
SOUTHWEST WIND 15 TO 20 KNOTS. GUSTS UP TO
20 KNOTS INCREASING TO 25 KNOTS EARLY IN THE MORNING. RAIN IN THE
EVENING. WAVES 1 TO 3 FEET.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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