182
FZUS53 KDLH 201117
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
617 AM CDT MON JUL 20 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.
LSZ140-201600-
GRAND PORTAGE TO GRAND MARAIS MN-
617 AM CDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
TODAY
SOUTHWEST WIND 20 TO 25 KNOTS. GUSTS UP TO 35 KNOTS
DECREASING TO 30 KNOTS LATE IN THE AFTERNOON. PATCHY SMOKE IN THE
MORNING. CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH THE DAY.
WAVES 4 TO 7 FEET. WAVES OCCASIONALLY TO 9 FEET.
TONIGHT
WEST WIND 15 TO 20 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS IN THE LATE EVENING AND EARLY MORNING,
THEN INCREASING TO 25 KNOTS EARLY IN THE MORNING. PATCHY SMOKE IN
THE EVENING. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
EVENING. WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET AFTER
MIDNIGHT.
TUESDAY
NORTHWEST WIND 20 TO 25 KNOTS BECOMING NORTH IN THE
AFTERNOON. GUSTS UP TO 30 KNOTS. PARTLY SUNNY. WAVES 2 TO 4 FEET.
A SMALL CRAFT ADVISORY MAY BE NEEDED.
TUESDAY NIGHT
NORTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO
25 KNOTS EARLY IN THE EVENING THEN 20 KNOTS AFTER MIDNIGHT.
PARTLY CLOUDY. WAVES 1 TO 2 FEET.
LSZ141-201600-
GRAND MARAIS TO TACONITE HARBOR MN-
617 AM CDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
TODAY
SOUTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
30 KNOTS BECOMING WEST 10 TO 15 KNOTS WITH GUSTS TO AROUND
25 KNOTS LATE IN THE AFTERNOON. PATCHY SMOKE EARLY IN THE
MORNING. PATCHY SMOKE LATE IN THE AFTERNOON. CHANCE OF SHOWERS
AND THUNDERSTORMS. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET IN
THE LATE MORNING AND AFTERNOON.
TONIGHT
WEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS LATE IN THE EVENING, THEN INCREASING TO
25 KNOTS AFTER MIDNIGHT. PATCHY SMOKE IN THE EVENING. SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING. SLIGHT CHANCE OF RAIN
SHOWERS THROUGH THE NIGHT. WAVES 1 TO 3 FEET SUBSIDING TO 1 TO
2 FEET IN THE LATE EVENING AND OVERNIGHT.
TUESDAY
NORTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
30 KNOTS BECOMING NORTH 10 TO 15 KNOTS WITH GUSTS TO AROUND
30 KNOTS IN THE AFTERNOON. PARTLY SUNNY. WAVES 1 TO 2 FEET.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO
20 KNOTS EARLY IN THE EVENING. PARTLY CLOUDY. WAVES 1 FOOT OR
LESS.
LSZ142-201600-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
617 AM CDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
TODAY
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
25 KNOTS. PATCHY SMOKE EARLY IN THE MORNING. PATCHY SMOKE LATE IN
THE AFTERNOON. CHANCE OF SHOWERS AND THUNDERSTORMS EARLY IN THE
MORNING. SLIGHT CHANCE OF RAIN SHOWERS IN THE LATE MORNING AND
AFTERNOON. SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES
1 TO 3 FEET.
TONIGHT
WEST WIND 5 TO 10 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS LATE IN THE EVENING, THEN INCREASING TO
25 KNOTS AFTER MIDNIGHT. PATCHY SMOKE IN THE EVENING. SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING. SLIGHT CHANCE OF RAIN
SHOWERS THROUGH THE NIGHT. WAVES 1 TO 2 FEET.
TUESDAY
NORTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 30 KNOTS
DECREASING TO 25 KNOTS LATE IN THE AFTERNOON. PARTLY SUNNY. WAVES
1 FOOT OR LESS.
TUESDAY NIGHT
NORTHWEST WIND 5 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING NORTHWEST 5 KNOTS AFTER MIDNIGHT. PARTLY
CLOUDY. WAVES 1 FOOT OR LESS.
LSZ143-201600-
SILVER BAY HARBOR TO TWO HARBORS MN-
617 AM CDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
TODAY
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
25 KNOTS. CHANCE OF SHOWERS AND THUNDERSTORMS EARLY IN THE
MORNING. PATCHY SMOKE LATE IN THE AFTERNOON. WAVES 1 TO 3 FEET.
TONIGHT
WEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS IN THE LATE EVENING AND EARLY MORNING,
THEN INCREASING TO 25 KNOTS EARLY IN THE MORNING. PATCHY SMOKE IN
THE EVENING. WAVES 1 TO 2 FEET.
TUESDAY
NORTHWEST WIND 10 TO 15 KNOTS BECOMING NORTH 5 TO
10 KNOTS LATE IN THE AFTERNOON. GUSTS UP TO 25 KNOTS. PARTLY
SUNNY. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
NORTH WIND 5 TO 10 KNOTS BECOMING NORTHWEST
AFTER MIDNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
LSZ144-201600-
TWO HARBORS TO DULUTH MN-
617 AM CDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
TODAY
SOUTHWEST WIND 15 TO 20 KNOTS. GUSTS UP TO 25 KNOTS
INCREASING TO 30 KNOTS LATE IN THE AFTERNOON. CHANCE OF SHOWERS
AND THUNDERSTORMS EARLY IN THE MORNING. PATCHY SMOKE IN THE
AFTERNOON. WAVES 1 TO 3 FEET.
TONIGHT
WEST WIND 15 TO 20 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS LATE IN THE EVENING, THEN INCREASING TO
25 KNOTS AFTER MIDNIGHT. PATCHY SMOKE IN THE EVENING. WAVES 1 TO
3 FEET.
TUESDAY
NORTHWEST WIND 15 TO 20 KNOTS BECOMING NORTH 10 TO
15 KNOTS LATE IN THE AFTERNOON. GUSTS UP TO 25 KNOTS. PARTLY
SUNNY. WAVES 1 TO 2 FEET.
TUESDAY NIGHT
NORTH WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING NORTHWEST AFTER MIDNIGHT. PARTLY CLOUDY. WAVES
1 FOOT OR LESS.
LSZ145-201600-
DULUTH MN TO PORT WING WI-
617 AM CDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
TODAY
SOUTHWEST WIND 15 TO 20 KNOTS BECOMING WEST LATE IN THE
AFTERNOON. GUSTS UP TO 25 KNOTS. CHANCE OF SHOWERS AND
THUNDERSTORMS EARLY IN THE MORNING. PATCHY SMOKE EARLY IN THE
MORNING. PATCHY SMOKE IN THE AFTERNOON. WAVES 1 TO 3 FEET.
TONIGHT
WEST WIND 15 TO 20 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS IN THE LATE EVENING AND EARLY MORNING,
THEN INCREASING TO 25 KNOTS EARLY IN THE MORNING. PATCHY SMOKE IN
THE EVENING. WAVES 1 TO 3 FEET.
TUESDAY
NORTHWEST WIND 15 TO 20 KNOTS BECOMING NORTH 10 TO
15 KNOTS LATE IN THE AFTERNOON. GUSTS UP TO 25 KNOTS. PARTLY
SUNNY. WAVES 1 TO 3 FEET.
TUESDAY NIGHT
NORTH WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING NORTHWEST 5 KNOTS AFTER MIDNIGHT. PARTLY
CLOUDY. WAVES 1 TO 2 FEET.
LSZ146-201600-
PORT WING TO SAND ISLAND WI-
617 AM CDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
TODAY
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS
INCREASING TO 30 KNOTS IN THE LATE MORNING AND EARLY AFTERNOON,
THEN DECREASING TO 25 KNOTS LATE IN THE AFTERNOON. CHANCE OF
SHOWERS AND THUNDERSTORMS EARLY IN THE MORNING. PATCHY SMOKE
EARLY IN THE MORNING. PATCHY SMOKE LATE IN THE AFTERNOON. WAVES
1 TO 3 FEET.
TONIGHT
WEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS IN THE LATE EVENING AND OVERNIGHT. PATCHY
SMOKE IN THE EVENING. WAVES 1 TO 3 FEET.
TUESDAY
NORTHWEST WIND 5 TO 10 KNOTS BECOMING NORTH IN THE
AFTERNOON. GUSTS UP TO 20 KNOTS. PARTLY SUNNY. WAVES 1 TO 2 FEET.
TUESDAY NIGHT
NORTH WIND 5 TO 10 KNOTS BECOMING NORTHWEST IN
THE LATE EVENING AND OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR
LESS.
LSZ147-201600-
SAND ISLAND TO BAYFIELD WI-
617 AM CDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
TODAY
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS
INCREASING TO 30 KNOTS IN THE LATE MORNING AND AFTERNOON. PATCHY
SMOKE EARLY IN THE MORNING. PATCHY SMOKE LATE IN THE AFTERNOON.
SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS EARLY IN THE MORNING,
THEN SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE LATE
MORNING AND AFTERNOON. WAVES 1 TO 3 FEET.
TONIGHT
WEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND 25 KNOTS
EASING TO 5 TO 10 KNOTS WITH GUSTS TO AROUND 20 KNOTS AFTER
MIDNIGHT. PATCHY SMOKE IN THE EVENING. SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. WAVES 1 TO 3 FEET.
TUESDAY
NORTHWEST WIND 10 KNOTS RISING TO 10 TO 15 KNOTS IN
THE LATE MORNING AND EARLY AFTERNOON, THEN BECOMING NORTH 5 TO
10 KNOTS LATE IN THE AFTERNOON. GUSTS UP TO 25 KNOTS. PARTLY
SUNNY. WAVES 1 TO 2 FEET.
TUESDAY NIGHT
NORTH WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING NORTHWEST IN THE LATE EVENING AND OVERNIGHT.
PARTLY CLOUDY. WAVES 1 TO 2 FEET.
LSZ150-201600-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
617 AM CDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
TODAY
SOUTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
30 KNOTS BECOMING WEST 10 TO 15 KNOTS WITH GUSTS TO AROUND
30 KNOTS LATE IN THE AFTERNOON. PATCHY SMOKE EARLY IN THE
MORNING. PATCHY SMOKE LATE IN THE AFTERNOON. CHANCE OF SHOWERS
AND THUNDERSTORMS IN THE MORNING. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. WAVES 1 TO 2 FEET BUILDING TO
2 TO 4 FEET IN THE LATE MORNING AND AFTERNOON.
TONIGHT
WEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS LATE IN THE EVENING, THEN INCREASING TO
25 KNOTS AFTER MIDNIGHT. PATCHY SMOKE IN THE EVENING. SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING. WAVES 1 TO
3 FEET.
TUESDAY
NORTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
30 KNOTS BECOMING NORTH WITH GUSTS TO AROUND 30 KNOTS LATE IN THE
AFTERNOON. PARTLY SUNNY. WAVES 1 TO 3 FEET.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS WITH GUSTS TO
AROUND 20 KNOTS BECOMING NORTHWEST 5 TO 10 KNOTS AFTER MIDNIGHT.
PARTLY CLOUDY. WAVES 1 TO 2 FEET.
LSZ121-201600-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
617 AM CDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
TODAY
SOUTHWEST WIND 15 TO 20 KNOTS BECOMING WEST LATE IN THE
AFTERNOON. GUSTS UP TO 25 KNOTS. PATCHY SMOKE EARLY IN THE
MORNING. PATCHY SMOKE LATE IN THE AFTERNOON. CHANCE OF SHOWERS
AND THUNDERSTORMS EARLY IN THE MORNING, THEN SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE LATE MORNING AND AFTERNOON.
WAVES 1 TO 2 FEET.
TONIGHT
WEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS IN THE LATE EVENING AND OVERNIGHT. PATCHY
SMOKE IN THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING. WAVES 1 TO 2 FEET.
TUESDAY
NORTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS BECOMING NORTH 10 TO 15 KNOTS WITH GUSTS TO AROUND
25 KNOTS LATE IN THE AFTERNOON. PARTLY SUNNY. WAVES 1 TO 2 FEET.
TUESDAY NIGHT
NORTH WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING NORTHWEST 5 TO 10 KNOTS IN THE LATE EVENING AND
OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
LSZ148-201600-
OAK POINT TO SAXON HARBOR WI-
617 AM CDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
TODAY
SOUTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS BECOMING WEST WITH GUSTS TO AROUND 30 KNOTS LATE IN THE
AFTERNOON. PATCHY SMOKE EARLY IN THE MORNING. PATCHY SMOKE LATE
IN THE AFTERNOON. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
MORNING. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. WAVES 1 TO 2 FEET.
TONIGHT
WEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS IN THE LATE EVENING AND OVERNIGHT. PATCHY
SMOKE IN THE EVENING. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
THROUGH THE NIGHT. WAVES 1 TO 2 FEET.
TUESDAY
NORTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
30 KNOTS BECOMING NORTH WITH GUSTS TO AROUND 30 KNOTS IN THE
AFTERNOON. PARTLY SUNNY. WAVES 1 TO 3 FEET.
TUESDAY NIGHT
NORTH WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
25 KNOTS BECOMING WEST 5 KNOTS AFTER MIDNIGHT. PARTLY CLOUDY.
WAVES 1 TO 2 FEET.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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