041
FZUS53 KDLH 191147
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
647 AM CDT WED AUG 19 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.
LSZ140-191600-
GRAND PORTAGE TO GRAND MARAIS MN-
647 AM CDT WED AUG 19 2026
TODAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST WITH GUSTS TO
AROUND 20 KNOTS IN THE LATE MORNING AND EARLY AFTERNOON, THEN
RISING TO 10 TO 15 KNOTS WITH GUSTS TO AROUND 20 KNOTS LATE IN
THE AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 2 FEET.
TONIGHT
SOUTH WIND 5 TO 10 KNOTS BECOMING NORTHEAST IN THE
LATE EVENING AND OVERNIGHT. PARTLY CLOUDY IN THE EVENING THEN
BECOMING MOSTLY CLOUDY. WAVES 1 TO 2 FEET.
THURSDAY
NORTHEAST WIND 5 KNOTS BECOMING SOUTHEAST IN THE LATE
MORNING AND AFTERNOON. SLIGHT CHANCE OF RAIN SHOWERS. WAVES
1 FOOT OR LESS.
THURSDAY NIGHT
EAST WIND 5 TO 10 KNOTS BECOMING NORTHEAST
EARLY IN THE MORNING. CHANCE OF RAIN SHOWERS THROUGH THE NIGHT.
WAVES 1 FOOT OR LESS.
LSZ141-191600-
GRAND MARAIS TO TACONITE HARBOR MN-
647 AM CDT WED AUG 19 2026
TODAY
NORTHWEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST WITH
GUSTS TO AROUND 20 KNOTS IN THE LATE MORNING AND AFTERNOON.
SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTH IN THE LATE
EVENING AND EARLY MORNING, THEN BECOMING VARIABLE 10 KNOTS OR
LESS EARLY IN THE MORNING. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
WEST WIND 5 KNOTS BECOMING EAST IN THE LATE MORNING
AND AFTERNOON. CHANCE OF RAIN SHOWERS THROUGH THE DAY. WAVES
1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 KNOTS. CHANCE OF RAIN SHOWERS
THROUGH THE NIGHT. WAVES 1 FOOT OR LESS.
LSZ142-191600-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
647 AM CDT WED AUG 19 2026
TODAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE LATE
MORNING AND AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST LATE IN THE
EVENING, THEN BECOMING VARIABLE 10 KNOTS OR LESS AFTER MIDNIGHT.
SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT OR
LESS.
THURSDAY
NORTH WIND 5 KNOTS BECOMING EAST IN THE LATE MORNING
AND AFTERNOON. CHANCE OF RAIN SHOWERS. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 KNOTS. SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. CHANCE OF RAIN SHOWERS THROUGH THE
NIGHT. WAVES 1 FOOT OR LESS.
LSZ143-191600-
SILVER BAY HARBOR TO TWO HARBORS MN-
647 AM CDT WED AUG 19 2026
TODAY
SOUTHWEST WIND 5 KNOTS RISING TO 5 TO 10 KNOTS IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTHWEST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS. SLIGHT CHANCE OF RAIN SHOWERS AFTER
MIDNIGHT. WAVES 1 FOOT OR LESS.
THURSDAY
NORTHEAST WIND 5 KNOTS BECOMING EAST IN THE LATE
MORNING AND AFTERNOON. CHANCE OF RAIN SHOWERS IN THE MORNING,
THEN RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. RAIN SHOWERS
LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN
SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT OR
LESS.
LSZ144-191600-
TWO HARBORS TO DULUTH MN-
647 AM CDT WED AUG 19 2026
TODAY
SOUTHWEST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR
LESS.
TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTH IN THE LATE
EVENING AND EARLY MORNING, THEN BECOMING NORTH 5 KNOTS EARLY IN
THE MORNING. SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
THURSDAY
EAST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS
THROUGH THE DAY. CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. CHANCE OF
THUNDERSTORMS IN THE EVENING. RAIN SHOWERS LIKELY THROUGH THE
NIGHT. WAVES 1 FOOT OR LESS.
LSZ145-191600-
DULUTH MN TO PORT WING WI-
647 AM CDT WED AUG 19 2026
TODAY
WEST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHWEST WIND 5 KNOTS BECOMING NORTHEAST EARLY IN THE
MORNING. SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
THURSDAY
EAST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS
THROUGH THE DAY. CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. CHANCE OF
THUNDERSTORMS IN THE EVENING. RAIN SHOWERS LIKELY THROUGH THE
NIGHT. WAVES 1 FOOT OR LESS.
LSZ146-191600-
PORT WING TO SAND ISLAND WI-
647 AM CDT WED AUG 19 2026
TODAY
WEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
WEST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS. SLIGHT CHANCE OF RAIN SHOWERS AFTER
MIDNIGHT. WAVES 1 FOOT OR LESS.
THURSDAY
EAST WIND 5 KNOTS BECOMING NORTHWEST EARLY IN THE
AFTERNOON, THEN BECOMING EAST LATE IN THE AFTERNOON. CHANCE OF
RAIN SHOWERS IN THE MORNING, THEN RAIN SHOWERS LIKELY AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. RAIN SHOWERS LIKELY THROUGH THE
NIGHT. WAVES 1 FOOT OR LESS.
LSZ147-191600-
SAND ISLAND TO BAYFIELD WI-
647 AM CDT WED AUG 19 2026
TODAY
WEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTH WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS, THEN BECOMING SOUTH 5 KNOTS AFTER
MIDNIGHT. SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT
OR LESS.
THURSDAY
SOUTHEAST WIND 5 KNOTS BECOMING EAST. CHANCE OF RAIN
SHOWERS THROUGH THE DAY. SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
EAST WIND 5 KNOTS BECOMING NORTHEAST EARLY IN
THE MORNING. SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING.
SHOWERS LIKELY THROUGH THE NIGHT. WAVES 1 FOOT OR LESS.
LSZ150-191600-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
647 AM CDT WED AUG 19 2026
TODAY
WEST WIND 5 TO 10 KNOTS BECOMING SOUTH LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTH WIND 5 KNOTS BECOMING SOUTHWEST IN THE LATE
EVENING AND OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
WEST WIND 5 KNOTS BECOMING SOUTHEAST IN THE LATE
MORNING AND EARLY AFTERNOON, THEN BECOMING EAST LATE IN THE
AFTERNOON. CHANCE OF RAIN SHOWERS THROUGH THE DAY. SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
EAST WIND 5 KNOTS BECOMING NORTHEAST EARLY IN
THE MORNING. SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING.
SHOWERS LIKELY THROUGH THE NIGHT. WAVES 1 FOOT OR LESS.
LSZ121-191600-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
647 AM CDT WED AUG 19 2026
TODAY
WEST WIND 5 KNOTS BECOMING NORTH LATE IN THE AFTERNOON.
SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 5 KNOTS BECOMING SOUTH LATE IN THE
EVENING, THEN BECOMING SOUTHWEST AFTER MIDNIGHT. SLIGHT CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
THURSDAY
SOUTH WIND 5 KNOTS BECOMING WEST LATE IN THE MORNING,
THEN BECOMING SOUTH EARLY IN THE AFTERNOON BECOMING SOUTHEAST
LATE IN THE AFTERNOON. CHANCE OF RAIN SHOWERS THROUGH THE DAY.
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
SOUTHEAST WIND 5 KNOTS BECOMING NORTH EARLY IN
THE MORNING. CHANCE OF THUNDERSTORMS IN THE EVENING. SHOWERS
LIKELY THROUGH THE NIGHT. WAVES 1 FOOT OR LESS.
LSZ148-191600-
OAK POINT TO SAXON HARBOR WI-
647 AM CDT WED AUG 19 2026
TODAY
WEST WIND 5 KNOTS BECOMING NORTH EARLY IN THE AFTERNOON,
THEN BECOMING EAST LATE IN THE AFTERNOON. SUNNY. WAVES 1 FOOT OR
LESS.
TONIGHT
EAST WIND 5 KNOTS BECOMING SOUTHWEST AFTER MIDNIGHT.
PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
SOUTHWEST WIND 5 KNOTS BECOMING SOUTHEAST IN THE
AFTERNOON. CHANCE OF RAIN SHOWERS THROUGH THE DAY. CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
SOUTHEAST WIND 5 KNOTS BECOMING NORTH EARLY IN
THE MORNING. CHANCE OF THUNDERSTORMS IN THE EVENING. SHOWERS
LIKELY THROUGH THE NIGHT. WAVES 1 FOOT OR LESS.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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