634
FZUS53 KDLH 192200
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
500 PM 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.
LSZ140-200400-
GRAND PORTAGE TO GRAND MARAIS MN-
500 PM CDT WED AUG 19 2026
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING NORTHWEST LATE IN THE EVENING, THEN BECOMING
NORTHEAST AFTER MIDNIGHT. PARTLY CLOUDY IN THE EVENING THEN
BECOMING MOSTLY CLOUDY. WAVES 1 TO 2 FEET.
THURSDAY
NORTHEAST WIND 5 KNOTS BECOMING EAST IN THE LATE
MORNING AND AFTERNOON. SLIGHT CHANCE OF RAIN SHOWERS IN THE
MORNING, THEN CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTHEAST EARLY
IN THE AFTERNOON, THEN BECOMING SOUTHWEST LATE IN THE AFTERNOON.
PARTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ141-200400-
GRAND MARAIS TO TACONITE HARBOR MN-
500 PM CDT WED AUG 19 2026
TONIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTH IN THE LATE
EVENING AND EARLY MORNING, THEN BECOMING VARIABLE 10 KNOTS OR
LESS LATE IN THE NIGHT. PARTLY CLOUDY IN THE EVENING THEN
BECOMING MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
VARIABLE WINDS 10 KNOTS OR LESS BECOMING EAST 5 KNOTS
IN THE LATE MORNING AND AFTERNOON. CHANCE OF RAIN SHOWERS THROUGH
THE DAY. CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES 1 FOOT
OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 KNOTS. SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING. WAVES 1 FOOT OR LESS.
FRIDAY
NORTH WIND 5 KNOTS BECOMING SOUTHEAST EARLY IN THE
AFTERNOON, THEN BECOMING SOUTHWEST LATE IN THE AFTERNOON. PARTLY
SUNNY. WAVES 1 FOOT OR LESS.
LSZ142-200400-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
500 PM CDT WED AUG 19 2026
TONIGHT
SOUTHWEST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS. SLIGHT CHANCE OF RAIN SHOWERS LATE IN
THE NIGHT. WAVES 1 FOOT OR LESS.
THURSDAY
VARIABLE WINDS 10 KNOTS OR LESS BECOMING NORTHEAST
5 KNOTS IN THE AFTERNOON. RAIN SHOWERS LIKELY IN THE MORNING,
THEN CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. WAVES
1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 KNOTS. CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. WAVES 1 FOOT OR LESS.
FRIDAY
NORTH WIND 5 KNOTS EARLY IN THE MORNING BECOMING
VARIABLE 10 KNOTS OR LESS, THEN BECOMING EAST 5 KNOTS EARLY IN
THE AFTERNOON BECOMING SOUTH. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ143-200400-
SILVER BAY HARBOR TO TWO HARBORS MN-
500 PM CDT WED AUG 19 2026
TONIGHT
SOUTHWEST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS. CHANCE OF RAIN SHOWERS LATE IN THE
NIGHT. WAVES 1 FOOT OR LESS.
THURSDAY
NORTHEAST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS IN THE MORNING, THEN RAIN
SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. CHANCE OF SHOWERS
AND THUNDERSTORMS IN THE EVENING. WAVES 1 FOOT OR LESS.
FRIDAY
NORTH WIND 5 KNOTS BECOMING EAST EARLY IN THE
AFTERNOON, THEN BECOMING SOUTH LATE IN THE AFTERNOON. PARTLY
SUNNY. WAVES 1 FOOT OR LESS.
LSZ144-200400-
TWO HARBORS TO DULUTH MN-
500 PM CDT WED AUG 19 2026
TONIGHT
SOUTHEAST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS, THEN BECOMING NORTHWEST 5 KNOTS LATE
IN THE NIGHT. SLIGHT CHANCE OF RAIN SHOWERS LATE IN THE NIGHT.
WAVES 1 FOOT OR LESS.
THURSDAY
EAST WIND 5 TO 10 KNOTS. SLIGHT CHANCE OF
THUNDERSTORMS IN THE MORNING. RAIN SHOWERS LIKELY THROUGH THE
DAY. CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES 1 FOOT OR
LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. RAIN SHOWERS
LIKELY AND CHANCE OF THUNDERSTORMS IN THE EVENING. WAVES 1 FOOT
OR LESS.
FRIDAY
NORTH WIND 5 KNOTS BECOMING SOUTH LATE IN THE
AFTERNOON. PARTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ145-200400-
DULUTH MN TO PORT WING WI-
500 PM CDT WED AUG 19 2026
TONIGHT
SOUTHEAST WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS, THEN BECOMING SOUTH 5 KNOTS AFTER
MIDNIGHT. SLIGHT CHANCE OF RAIN SHOWERS LATE IN THE NIGHT. WAVES
1 FOOT OR LESS.
THURSDAY
SOUTHEAST WIND 5 TO 10 KNOTS BECOMING EAST LATE IN
THE AFTERNOON. SLIGHT CHANCE OF THUNDERSTORMS IN THE MORNING.
RAIN SHOWERS LIKELY THROUGH THE DAY. CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS BECOMING NORTH
EARLY IN THE MORNING. RAIN SHOWERS LIKELY AND CHANCE OF
THUNDERSTORMS IN THE EVENING. WAVES 1 FOOT OR LESS.
FRIDAY
NORTH WIND 5 KNOTS. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ146-200400-
PORT WING TO SAND ISLAND WI-
500 PM CDT WED AUG 19 2026
TONIGHT
SOUTH WIND 5 KNOTS EARLY IN THE EVENING BECOMING
VARIABLE 10 KNOTS OR LESS, THEN BECOMING SOUTH 5 KNOTS LATE IN
THE NIGHT. SLIGHT CHANCE OF RAIN SHOWERS LATE IN THE NIGHT. WAVES
1 FOOT OR LESS.
THURSDAY
SOUTHEAST WIND 5 KNOTS BECOMING WEST EARLY IN THE
AFTERNOON, THEN BECOMING EAST LATE IN THE AFTERNOON. CHANCE OF
RAIN SHOWERS IN THE MORNING, THEN RAIN SHOWERS LIKELY AND CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
NORTHEAST WIND 5 KNOTS BECOMING NORTH EARLY IN
THE MORNING. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING.
WAVES 1 FOOT OR LESS.
FRIDAY
NORTH WIND 5 KNOTS UNTIL LATE AFTERNOON BECOMING
VARIABLE 10 KNOTS OR LESS. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ147-200400-
SAND ISLAND TO BAYFIELD WI-
500 PM CDT WED AUG 19 2026
TONIGHT
SOUTH WIND 5 KNOTS. MOSTLY CLEAR IN THE EVENING THEN
BECOMING MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
SOUTH WIND 5 KNOTS BECOMING SOUTHEAST LATE IN THE
AFTERNOON. RAIN SHOWERS LIKELY THROUGH THE DAY. CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
SOUTHEAST WIND 5 KNOTS BECOMING NORTH AFTER
MIDNIGHT. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING.
WAVES 1 FOOT OR LESS.
FRIDAY
NORTH WIND 5 KNOTS BECOMING SOUTHEAST LATE IN THE
AFTERNOON. PARTLY SUNNY IN THE MORNING THEN CLEARING. WAVES
1 FOOT OR LESS.
LSZ150-200400-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
500 PM CDT WED AUG 19 2026
TONIGHT
SOUTH WIND 5 KNOTS. PARTLY CLOUDY UNTIL EARLY MORNING
THEN BECOMING MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
SOUTHWEST WIND 5 KNOTS BECOMING SOUTHEAST LATE IN THE
AFTERNOON. CHANCE OF RAIN SHOWERS IN THE MORNING, THEN RAIN
SHOWERS LIKELY AND 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 SHOWERS AND THUNDERSTORMS IN THE EVENING.
WAVES 1 FOOT OR LESS.
FRIDAY
NORTH WIND 5 KNOTS BECOMING SOUTHWEST LATE IN THE
AFTERNOON. PARTLY SUNNY IN THE MORNING THEN CLEARING. WAVES
1 FOOT OR LESS.
LSZ121-200400-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
500 PM CDT WED AUG 19 2026
TONIGHT
EAST WIND 5 KNOTS BECOMING SOUTH IN THE LATE EVENING
AND OVERNIGHT. PARTLY CLOUDY UNTIL EARLY MORNING THEN BECOMING
MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
SOUTH WIND 5 KNOTS BECOMING SOUTHEAST LATE IN THE
AFTERNOON. CHANCE OF RAIN SHOWERS IN THE MORNING, THEN RAIN
SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
SOUTHEAST WIND 5 KNOTS BECOMING WEST EARLY IN
THE MORNING. SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS IN THE
EVENING. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHWEST WIND 5 KNOTS BECOMING NORTH IN THE AFTERNOON.
MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ148-200400-
OAK POINT TO SAXON HARBOR WI-
500 PM CDT WED AUG 19 2026
TONIGHT
SOUTHEAST WIND 5 KNOTS BECOMING SOUTH IN THE LATE
EVENING AND OVERNIGHT. PARTLY CLOUDY UNTIL EARLY MORNING THEN
BECOMING MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.
THURSDAY
SOUTH WIND 5 KNOTS BECOMING SOUTHEAST LATE IN THE
AFTERNOON. CHANCE OF RAIN SHOWERS IN THE MORNING, THEN RAIN
SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
WAVES 1 FOOT OR LESS.
THURSDAY NIGHT
SOUTHEAST WIND 5 KNOTS BECOMING SOUTHWEST EARLY
IN THE MORNING. SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS IN THE
EVENING. WAVES 1 FOOT OR LESS.
FRIDAY
WEST WIND 5 KNOTS BECOMING NORTH IN THE LATE MORNING
AND AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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