489
FZUS53 KDLH 131018
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
517 AM CDT MON APR 13 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.
LSZ140-131600-
GRAND PORTAGE TO GRAND MARAIS MN-
518 AM CDT MON APR 13 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
TUESDAY MORNING...
TODAY
WEST WIND 5 TO 10 KNOTS BECOMING EAST LATE IN THE
AFTERNOON. PATCHY FOG EARLY IN THE MORNING. WAVES 1 TO 2 FEET.
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS IN
THE LATE EVENING AND EARLY MORNING DECREASING TO 20 KNOTS. PATCHY
FOG THROUGH THE NIGHT. SLIGHT CHANCE OF RAIN SHOWERS THROUGH THE
NIGHT. WAVES 1 TO 3 FEET.
TUESDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS.
PATCHY FOG IN THE MORNING. CHANCE OF RAIN SHOWERS THROUGH THE
DAY. WAVES 1 TO 3 FEET.
TUESDAY NIGHT
NORTH WIND 5 KNOTS. MOSTLY CLOUDY. WAVES 1 TO
2 FEET.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ141-131600-
GRAND MARAIS TO TACONITE HARBOR MN-
518 AM CDT MON APR 13 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
TUESDAY MORNING...
TODAY
WEST WIND 5 KNOTS BECOMING NORTH EARLY IN THE AFTERNOON,
THEN BECOMING EAST LATE IN THE AFTERNOON. MOSTLY CLOUDY. WAVES
1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS IN
THE LATE EVENING AND EARLY MORNING DECREASING TO 20 KNOTS. CHANCE
OF RAIN SHOWERS THROUGH THE NIGHT. PATCHY FOG AFTER MIDNIGHT.
WAVES 1 TO 2 FEET BUILDING TO 1 TO 3 FEET AFTER MIDNIGHT.
TUESDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS EASING TO 5 KNOTS LATE IN THE AFTERNOON. CHANCE OF RAIN
SHOWERS. WAVES 1 TO 3 FEET.
TUESDAY NIGHT
NORTH WIND 5 KNOTS. MOSTLY CLOUDY. WAVES 1 TO
2 FEET.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ142-131600-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
518 AM CDT MON APR 13 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
TUESDAY AFTERNOON...
TODAY
WEST WIND 5 KNOTS BECOMING NORTHWEST LATE IN THE
MORNING, THEN BECOMING NORTHEAST IN THE AFTERNOON. SLIGHT CHANCE
OF RAIN SHOWERS LATE IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS IN
THE LATE EVENING AND EARLY MORNING DECREASING TO 20 KNOTS. PATCHY
FOG. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS.
WAVES 1 TO 2 FEET BUILDING TO 2 TO 4 FEET AFTER MIDNIGHT.
TUESDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS EASING TO 5 KNOTS LATE IN THE AFTERNOON. PATCHY FOG IN
THE MORNING. CHANCE OF RAIN SHOWERS THROUGH THE DAY. WAVES 2 TO
4 FEET SUBSIDING TO 1 TO 3 FEET LATE IN THE AFTERNOON.
TUESDAY NIGHT
NORTH WIND 5 KNOTS. MOSTLY CLOUDY. WAVES 1 TO
2 FEET.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ143-131600-
SILVER BAY HARBOR TO TWO HARBORS MN-
518 AM CDT MON APR 13 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
TUESDAY AFTERNOON...
TODAY
WEST WIND 5 KNOTS BECOMING NORTHEAST IN THE AFTERNOON.
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS LATE IN THE AFTERNOON.
WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO 20 KNOTS
INCREASING TO 25 KNOTS IN THE LATE EVENING AND EARLY MORNING,
THEN DECREASING TO 20 KNOTS EARLY IN THE MORNING. PATCHY FOG
THROUGH THE NIGHT. SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING.
CHANCE OF RAIN SHOWERS THROUGH THE NIGHT. WAVES 1 TO 2 FEET
BUILDING TO 2 TO 4 FEET IN THE LATE EVENING AND OVERNIGHT.
TUESDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS EASING TO 5 KNOTS LATE IN THE AFTERNOON. PATCHY FOG IN
THE MORNING. CHANCE OF RAIN SHOWERS IN THE MORNING, THEN SLIGHT
CHANCE OF RAIN SHOWERS IN THE AFTERNOON. WAVES 2 TO 4 FEET
SUBSIDING TO 1 TO 3 FEET LATE IN THE AFTERNOON.
TUESDAY NIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLOUDY. WAVES
1 TO 2 FEET.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ144-131600-
TWO HARBORS TO DULUTH MN-
518 AM CDT MON APR 13 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
TUESDAY AFTERNOON...
TODAY
WEST WIND 5 KNOTS BECOMING NORTHEAST 10 TO 15 KNOTS IN
THE AFTERNOON. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS LATE IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO 25 KNOTS IN
THE LATE EVENING AND OVERNIGHT. PATCHY FOG THROUGH THE NIGHT.
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING. CHANCE OF RAIN
SHOWERS THROUGH THE NIGHT. WAVES 2 TO 4 FEET.
TUESDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS EASING TO 5 KNOTS LATE IN THE AFTERNOON. PATCHY FOG IN
THE MORNING. SLIGHT CHANCE OF RAIN SHOWERS THROUGH THE DAY. WAVES
2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET LATE IN THE AFTERNOON.
TUESDAY NIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLOUDY. WAVES
1 TO 2 FEET.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ145-131600-
DULUTH MN TO PORT WING WI-
518 AM CDT MON APR 13 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
TUESDAY AFTERNOON...
TODAY
WEST WIND 5 KNOTS BECOMING NORTHWEST LATE IN THE
MORNING, THEN BECOMING NORTHEAST 10 TO 15 KNOTS IN THE AFTERNOON.
CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS LATE IN
THE AFTERNOON. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO 25 KNOTS IN
THE LATE EVENING AND EARLY MORNING DECREASING TO 20 KNOTS. PATCHY
FOG. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS.
WAVES 2 TO 4 FEET.
TUESDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
EARLY IN THE MORNING. PATCHY FOG IN THE MORNING. SLIGHT CHANCE OF
RAIN SHOWERS THROUGH THE DAY. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO
3 FEET IN THE AFTERNOON.
TUESDAY NIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLOUDY. WAVES
1 TO 2 FEET.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ146-131600-
PORT WING TO SAND ISLAND WI-
518 AM CDT MON APR 13 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
TUESDAY AFTERNOON...
TODAY
WEST WIND 5 KNOTS BECOMING NORTHEAST IN THE AFTERNOON.
PATCHY FOG EARLY IN THE MORNING. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS LATE IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO 20 KNOTS
INCREASING TO 25 KNOTS IN THE LATE EVENING AND EARLY MORNING,
THEN DECREASING TO 20 KNOTS EARLY IN THE MORNING. PATCHY FOG.
CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS. WAVES
1 TO 2 FEET BUILDING TO 2 TO 4 FEET IN THE LATE EVENING AND
OVERNIGHT.
TUESDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS EASING TO 5 KNOTS LATE IN THE AFTERNOON. PATCHY FOG IN
THE MORNING. SLIGHT CHANCE OF RAIN SHOWERS THROUGH THE DAY. WAVES
2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET LATE IN THE AFTERNOON.
TUESDAY NIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLOUDY. WAVES
1 TO 2 FEET.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ147-131600-
SAND ISLAND TO BAYFIELD WI-
518 AM CDT MON APR 13 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
TUESDAY AFTERNOON...
TODAY
WEST WIND 5 KNOTS BECOMING NORTHEAST IN THE AFTERNOON.
SLIGHT CHANCE OF RAIN SHOWERS LATE IN THE AFTERNOON. WAVES 1 FOOT
OR LESS.
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS IN
THE LATE EVENING AND EARLY MORNING DECREASING TO 20 KNOTS. PATCHY
FOG. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS.
WAVES 1 TO 2 FEET BUILDING TO 2 TO 4 FEET IN THE LATE EVENING AND
OVERNIGHT.
TUESDAY
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS EASING TO 5 KNOTS LATE IN THE AFTERNOON. PATCHY FOG IN
THE MORNING. SLIGHT CHANCE OF RAIN SHOWERS THROUGH THE DAY. WAVES
2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET LATE IN THE AFTERNOON.
TUESDAY NIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLOUDY. WAVES
1 TO 2 FEET.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ150-131600-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
518 AM CDT MON APR 13 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH
TUESDAY AFTERNOON...
TODAY
NORTHWEST WIND 5 TO 10 KNOTS BECOMING NORTHEAST IN THE
AFTERNOON. SLIGHT CHANCE OF RAIN SHOWERS LATE IN THE AFTERNOON.
WAVES 1 TO 2 FEET.
TONIGHT
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO 20 KNOTS
INCREASING TO 25 KNOTS IN THE LATE EVENING AND OVERNIGHT. PATCHY
FOG. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS.
WAVES 1 TO 2 FEET BUILDING TO 3 TO 5 FEET IN THE LATE EVENING AND
OVERNIGHT. WAVES OCCASIONALLY TO 7 FEET.
TUESDAY
NORTHEAST WIND 15 TO 20 KNOTS EASING TO 5 TO 10 KNOTS
LATE IN THE AFTERNOON. PATCHY FOG IN THE MORNING. SLIGHT CHANCE
OF RAIN SHOWERS THROUGH THE DAY. WAVES 3 TO 5 FEET.
TUESDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS. MOSTLY CLOUDY.
WAVES 1 TO 3 FEET.
NOTE...WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ148-131600-
OAK POINT TO SAXON HARBOR WI-
518 AM CDT MON APR 13 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING
TODAY
NORTHWEST WIND 5 KNOTS BECOMING NORTHEAST IN THE
AFTERNOON. PATCHY FOG EARLY IN THE MORNING. SLIGHT CHANCE OF RAIN
SHOWERS LATE IN THE AFTERNOON. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
UNTIL EARLY MORNING. PATCHY FOG. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. WAVES 1 TO 2 FEET BUILDING TO
2 TO 4 FEET IN THE LATE EVENING AND OVERNIGHT.
TUESDAY
NORTHEAST WIND 5 TO 10 KNOTS BECOMING NORTH IN THE
AFTERNOON. PATCHY FOG IN THE MORNING. SLIGHT CHANCE OF RAIN
SHOWERS THROUGH THE DAY. WAVES 1 TO 3 FEET.
TUESDAY NIGHT
NORTHEAST WIND 5 KNOTS. MOSTLY CLOUDY. WAVES
1 TO 2 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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