434
FZUS53 KDLH 172158
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
457 PM CDT MON AUG 17 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.
LSZ140-180400-
GRAND PORTAGE TO GRAND MARAIS MN-
457 PM CDT MON AUG 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING
TONIGHT
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
25 KNOTS BECOMING WEST 5 TO 10 KNOTS LATE IN THE NIGHT. CHANCE OF
RAIN SHOWERS IN THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS UNTIL
EARLY MORNING. SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET IN THE LATE EVENING
AND OVERNIGHT.
TUESDAY
WEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND 20 KNOTS
BECOMING SOUTHWEST WITH GUSTS TO AROUND 20 KNOTS LATE IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 3 FEET.
TUESDAY NIGHT
WEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING NORTHWEST 5 TO 10 KNOTS AFTER MIDNIGHT. PARTLY
CLOUDY. WAVES 1 TO 3 FEET.
WEDNESDAY
NORTHWEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST WITH
GUSTS TO AROUND 20 KNOTS IN THE AFTERNOON. MOSTLY SUNNY. WAVES
1 TO 2 FEET.
LSZ141-180400-
GRAND MARAIS TO TACONITE HARBOR MN-
457 PM CDT MON AUG 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING
TONIGHT
WEST 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 TO 2 FEET.
TUESDAY
WEST WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND 20 KNOTS
BECOMING SOUTHWEST WITH GUSTS TO AROUND 20 KNOTS LATE IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 2 FEET.
TUESDAY NIGHT
WEST WIND 5 TO 10 KNOTS BECOMING NORTHWEST EARLY
IN THE MORNING. MOSTLY CLEAR. WAVES 1 TO 2 FEET.
WEDNESDAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
LSZ142-180400-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
457 PM CDT MON AUG 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING
TONIGHT
WEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS EARLY IN
THE EVENING. RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF
THUNDERSTORMS EARLY IN THE EVENING, THEN CHANCE OF SHOWERS AND
THUNDERSTORMS LATE IN THE EVENING. SLIGHT CHANCE OF RAIN SHOWERS
AFTER MIDNIGHT. WAVES 1 TO 2 FEET.
TUESDAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
WEST WIND 5 KNOTS BECOMING NORTHWEST EARLY IN
THE MORNING. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
WEDNESDAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ143-180400-
SILVER BAY HARBOR TO TWO HARBORS MN-
457 PM CDT MON AUG 17 2026
TONIGHT
WEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS EARLY IN
THE EVENING. RAIN SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS IN
THE EVENING, THEN SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
TUESDAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
WEDNESDAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ144-180400-
TWO HARBORS TO DULUTH MN-
457 PM CDT MON AUG 17 2026
TONIGHT
WEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS EARLY IN
THE EVENING. RAIN SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS IN
THE EVENING, THEN SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
TUESDAY
NORTHWEST WIND 5 KNOTS BECOMING WEST IN THE AFTERNOON.
MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS. MOSTLY CLEAR.
WAVES 1 FOOT OR LESS.
WEDNESDAY
WEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
LSZ145-180400-
DULUTH MN TO PORT WING WI-
457 PM CDT MON AUG 17 2026
TONIGHT
WEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS EARLY IN
THE EVENING. RAIN SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS IN
THE EVENING, THEN SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
WAVES 1 TO 2 FEET.
TUESDAY
WEST WIND 5 TO 10 KNOTS. MOSTLY SUNNY. WAVES 1 FOOT OR
LESS.
TUESDAY NIGHT
WEST WIND 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES
1 FOOT OR LESS.
WEDNESDAY
WEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
LSZ146-180400-
PORT WING TO SAND ISLAND WI-
457 PM CDT MON AUG 17 2026
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING WEST LATE IN THE
NIGHT. SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS IN THE EVENING,
THEN SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.
WAVES 1 TO 2 FEET.
TUESDAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
WEDNESDAY
WEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
LSZ147-180400-
SAND ISLAND TO BAYFIELD WI-
457 PM CDT MON AUG 17 2026
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING WEST AFTER
MIDNIGHT. SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS IN THE
EVENING, THEN SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER
MIDNIGHT. WAVES 1 TO 2 FEET.
TUESDAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST LATE IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
WEDNESDAY
WEST WIND 5 KNOTS BECOMING SOUTHWEST LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ150-180400-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
457 PM CDT MON AUG 17 2026
TONIGHT
SOUTH WIND 5 TO 10 KNOTS BECOMING WEST LATE IN THE
NIGHT. SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS IN THE EVENING.
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. WAVES
1 TO 2 FEET.
TUESDAY
NORTHWEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST LATE
IN THE AFTERNOON. SUNNY. WAVES 1 TO 2 FEET.
TUESDAY NIGHT
WEST WIND 5 KNOTS RISING TO 5 TO 10 KNOTS AFTER
MIDNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
WEDNESDAY
WEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST LATE IN
THE AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ121-180400-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
457 PM CDT MON AUG 17 2026
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING WEST AFTER
MIDNIGHT. CHANCE OF THUNDERSTORMS IN THE EVENING. CHANCE OF RAIN
SHOWERS THROUGH THE NIGHT. SLIGHT CHANCE OF THUNDERSTORMS AFTER
MIDNIGHT. WAVES 1 FOOT OR LESS.
TUESDAY
NORTHWEST WIND 5 KNOTS BECOMING WEST. MOSTLY SUNNY.
WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
WEDNESDAY
WEST WIND 5 KNOTS BECOMING NORTHWEST IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ148-180400-
OAK POINT TO SAXON HARBOR WI-
457 PM CDT MON AUG 17 2026
TONIGHT
SOUTH WIND 5 TO 10 KNOTS BECOMING WEST LATE IN THE
NIGHT. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING. SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 TO
2 FEET.
TUESDAY
NORTHWEST WIND 5 KNOTS BECOMING NORTH EARLY IN THE
AFTERNOON, THEN BECOMING SOUTHEAST LATE IN THE AFTERNOON. MOSTLY
SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
WEDNESDAY
WEST WIND 5 KNOTS BECOMING NORTHWEST IN THE LATE
MORNING AND EARLY AFTERNOON, THEN BECOMING NORTHEAST LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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