370
FZUS53 KDLH 170758
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
257 AM 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.
LSZ140-171600-
GRAND PORTAGE TO GRAND MARAIS MN-
257 AM CDT MON AUG 17 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM NOON CDT TODAY THROUGH
THIS EVENING...
TODAY
WEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST 15 TO
20 KNOTS WITH GUSTS TO AROUND 30 KNOTS IN THE AFTERNOON. MOSTLY
SUNNY. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET LATE IN THE
AFTERNOON.
TONIGHT
WEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND 25 KNOTS
EASING TO 5 TO 10 KNOTS EARLY IN THE MORNING. RAIN SHOWERS LIKELY
IN THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS THROUGH THE NIGHT.
SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
TUESDAY
WEST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 2 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 2 FEET.
LSZ141-171600-
GRAND MARAIS TO TACONITE HARBOR MN-
257 AM CDT MON AUG 17 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM NOON CDT TODAY THROUGH
THIS EVENING...
TODAY
WEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST WITH GUSTS TO
AROUND 20 KNOTS IN THE AFTERNOON. MOSTLY SUNNY. WAVES 1 TO
2 FEET.
TONIGHT
WEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS EARLY IN
THE EVENING. CHANCE OF RAIN SHOWERS IN THE EVENING. SLIGHT CHANCE
OF THUNDERSTORMS THROUGH THE NIGHT. SLIGHT CHANCE OF RAIN SHOWERS
AFTER MIDNIGHT. WAVES 1 TO 2 FEET.
TUESDAY
WEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS EASING TO 5 KNOTS
EARLY IN THE MORNING. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
LSZ142-171600-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
257 AM CDT MON AUG 17 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM NOON CDT TODAY THROUGH
THIS EVENING...
TODAY
SOUTHWEST WIND 5 KNOTS RISING TO 5 TO 10 KNOTS WITH
GUSTS TO AROUND 20 KNOTS IN THE AFTERNOON. PATCHY FOG EARLY IN
THE MORNING. WAVES 1 FOOT OR LESS.
TONIGHT
WEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS EARLY IN
THE EVENING. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. 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 KNOTS. MOSTLY CLEAR. WAVES
1 FOOT OR LESS.
LSZ143-171600-
SILVER BAY HARBOR TO TWO HARBORS MN-
257 AM CDT MON AUG 17 2026
TODAY
SOUTHWEST WIND 5 KNOTS RISING TO 5 TO 10 KNOTS WITH
GUSTS TO AROUND 20 KNOTS IN THE AFTERNOON. MOSTLY SUNNY. WAVES
1 FOOT OR LESS.
TONIGHT
WEST WIND 5 TO 10 KNOTS. RAIN SHOWERS LIKELY AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING. 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 KNOTS. MOSTLY CLEAR. WAVES
1 FOOT OR LESS.
LSZ144-171600-
TWO HARBORS TO DULUTH MN-
257 AM CDT MON AUG 17 2026
TODAY
SOUTHWEST WIND 5 TO 10 KNOTS. SLIGHT CHANCE OF RAIN
SHOWERS LATE IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
TONIGHT
WEST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING. WAVES 1 FOOT OR
LESS.
TUESDAY
NORTHWEST WIND 5 TO 10 KNOTS. MOSTLY SUNNY. WAVES
1 FOOT OR LESS.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS. MOSTLY CLEAR.
WAVES 1 FOOT OR LESS.
LSZ145-171600-
DULUTH MN TO PORT WING WI-
257 AM CDT MON AUG 17 2026
TODAY
SOUTHWEST WIND 5 TO 10 KNOTS. SLIGHT CHANCE OF RAIN
SHOWERS LATE IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
TONIGHT
WEST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING. WAVES 1 FOOT OR
LESS.
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.
LSZ146-171600-
PORT WING TO SAND ISLAND WI-
257 AM CDT MON AUG 17 2026
TODAY
SOUTHWEST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR
LESS.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS
EARLY IN THE EVENING. SHOWERS LIKELY AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. WAVES 1 FOOT OR LESS.
TUESDAY
WEST WIND 5 KNOTS. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
LSZ147-171600-
SAND ISLAND TO BAYFIELD WI-
257 AM CDT MON AUG 17 2026
TODAY
SOUTHWEST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR
LESS.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING WEST EARLY IN
THE MORNING. CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS
IN THE EVENING. WAVES 1 FOOT OR LESS.
TUESDAY
WEST WIND 5 KNOTS. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
LSZ150-171600-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
257 AM CDT MON AUG 17 2026
TODAY
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING SOUTH LATE IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING WEST IN THE LATE
EVENING AND OVERNIGHT. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE EVENING. WAVES 1 FOOT OR LESS.
TUESDAY
WEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST LATE IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
WEST WIND 5 KNOTS BECOMING NORTHWEST AFTER
MIDNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.
LSZ121-171600-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
257 AM CDT MON AUG 17 2026
TODAY
SOUTHWEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS. CHANCE OF SHOWERS IN THE
EVENING. SLIGHT CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. SLIGHT
CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
TUESDAY
NORTHWEST WIND 5 KNOTS. MOSTLY SUNNY. WAVES 1 FOOT OR
LESS.
TUESDAY NIGHT
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
LSZ148-171600-
OAK POINT TO SAXON HARBOR WI-
257 AM CDT MON AUG 17 2026
TODAY
SOUTHWEST WIND 5 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. CHANCE OF SHOWERS IN THE EVENING. SLIGHT
CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
TUESDAY
NORTHWEST WIND 5 KNOTS. MOSTLY SUNNY. WAVES 1 FOOT OR
LESS.
TUESDAY NIGHT
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR
LESS.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page