561
FZUS53 KDLH 182358
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
658 PM CDT MON MAY 18 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.
LSZ140-191000-
GRAND PORTAGE TO GRAND MARAIS MN-
658 PM CDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON
REST OF TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS BECOMING NORTH
TOWARD DAYBREAK. GUSTS UP TO 25 KNOTS. SLIGHT CHANCE OF RAIN
SHOWERS IN THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS THROUGH
THE NIGHT. RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 TO 2 FEET
BUILDING TO 2 TO 4 FEET IN THE LATE EVENING AND OVERNIGHT.
TUESDAY
NORTH WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS BECOMING NORTHWEST 5 TO 10 KNOTS IN THE LATE MORNING AND
AFTERNOON. CHANCE OF RAIN SHOWERS IN THE MORNING. WAVES 2 TO
4 FEET SUBSIDING TO 1 TO 3 FEET IN THE LATE MORNING AND
AFTERNOON.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS. MOSTLY CLOUDY IN
THE EVENING THEN BECOMING PARTLY CLOUDY. WAVES 1 TO 2 FEET.
WEDNESDAY
NORTHWEST WIND 5 TO 10 KNOTS BECOMING SOUTH 10 TO
15 KNOTS WITH GUSTS TO AROUND 20 KNOTS IN THE AFTERNOON. SUNNY.
WAVES 1 TO 2 FEET.
LSZ141-191000-
GRAND MARAIS TO TACONITE HARBOR MN-
658 PM CDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON
REST OF TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 25 KNOTS BECOMING NORTH 5 TO 10 KNOTS TOWARD DAYBREAK.
CHANCE OF RAIN SHOWERS IN THE EVENING. SLIGHT CHANCE OF
THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER MIDNIGHT.
WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET AFTER MIDNIGHT.
TUESDAY
WEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS LATE IN
THE AFTERNOON. CHANCE OF RAIN SHOWERS IN THE MORNING. CHANCE OF
SPRINKLES IN THE AFTERNOON. WAVES 1 TO 3 FEET SUBSIDING TO 1 TO
2 FEET IN THE LATE MORNING AND AFTERNOON.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO
20 KNOTS EARLY IN THE EVENING. MOSTLY CLOUDY IN THE EVENING THEN
BECOMING PARTLY CLOUDY. WAVES 1 TO 2 FEET.
WEDNESDAY
WEST WIND 5 KNOTS BECOMING SOUTH IN THE AFTERNOON.
SUNNY. WAVES 1 FOOT OR LESS.
LSZ142-191000-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
658 PM CDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON
REST OF TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 25 KNOTS BECOMING NORTH 5 TO 10 KNOTS TOWARD DAYBREAK.
CHANCE OF RAIN SHOWERS IN THE EVENING. SLIGHT CHANCE OF
THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER MIDNIGHT.
WAVES 1 TO 2 FEET BUILDING TO 2 TO 4 FEET AFTER MIDNIGHT.
TUESDAY
WEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN THE
AFTERNOON. CHANCE OF RAIN SHOWERS IN THE MORNING. CHANCE OF
SPRINKLES IN THE AFTERNOON. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO
3 FEET IN THE AFTERNOON.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO
20 KNOTS EARLY IN THE EVENING. MOSTLY CLOUDY IN THE EVENING THEN
BECOMING PARTLY CLOUDY. WAVES 1 TO 2 FEET.
WEDNESDAY
NORTHWEST WIND 5 KNOTS BECOMING WEST LATE IN THE
MORNING, THEN BECOMING SOUTH IN THE AFTERNOON. SUNNY. WAVES
1 FOOT OR LESS.
LSZ143-191000-
SILVER BAY HARBOR TO TWO HARBORS MN-
658 PM CDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON
REST OF TONIGHT
NORTHEAST WIND 10 KNOTS WITH GUSTS TO AROUND
20 KNOTS RISING TO 10 TO 15 KNOTS WITH GUSTS TO AROUND 25 KNOTS
IN THE LATE EVENING AND OVERNIGHT. CHANCE OF RAIN SHOWERS IN THE
EVENING. CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS
AFTER MIDNIGHT. WAVES 1 TO 2 FEET BUILDING TO 2 TO 4 FEET AFTER
MIDNIGHT.
TUESDAY
WEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN THE
AFTERNOON. CHANCE OF RAIN SHOWERS IN THE MORNING. CHANCE OF
SPRINKLES IN THE AFTERNOON. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO
3 FEET IN THE AFTERNOON.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS. MOSTLY CLOUDY IN
THE EVENING THEN CLEARING. WAVES 1 TO 2 FEET.
WEDNESDAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHEAST IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ144-191000-
TWO HARBORS TO DULUTH MN-
658 PM CDT MON MAY 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING
THROUGH TUESDAY MORNING...
REST OF TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS INCREASING TO 25 KNOTS IN THE LATE EVENING AND EARLY
MORNING, THEN DECREASING TO 20 KNOTS TOWARD DAYBREAK. RAIN
SHOWERS LIKELY IN THE EVENING. CHANCE OF THUNDERSTORMS THROUGH
THE NIGHT. RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 TO 3 FEET
BUILDING TO 2 TO 4 FEET AFTER MIDNIGHT.
TUESDAY
WEST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS IN THE
LATE MORNING AND AFTERNOON. CHANCE OF RAIN SHOWERS IN THE
MORNING. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET IN THE
AFTERNOON.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO
20 KNOTS EARLY IN THE EVENING. MOSTLY CLOUDY IN THE EVENING THEN
CLEARING. WAVES 1 TO 2 FEET.
WEDNESDAY
WEST WIND 5 KNOTS BECOMING SOUTHEAST IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ145-191000-
DULUTH MN TO PORT WING WI-
658 PM CDT MON MAY 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING
THROUGH TUESDAY MORNING...
REST OF TONIGHT
NORTHEAST WIND 15 TO 20 KNOTS EASING TO 5 TO
10 KNOTS TOWARD DAYBREAK. GUSTS UP TO 20 KNOTS INCREASING TO
25 KNOTS IN THE LATE EVENING AND EARLY MORNING, THEN DECREASING
TO 20 KNOTS TOWARD DAYBREAK. RAIN SHOWERS LIKELY IN THE EVENING.
CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER
MIDNIGHT. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET AFTER
MIDNIGHT.
TUESDAY
WEST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS IN THE
LATE MORNING AND AFTERNOON. CHANCE OF RAIN SHOWERS IN THE
MORNING. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET IN THE
AFTERNOON.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO
20 KNOTS EARLY IN THE EVENING. MOSTLY CLOUDY IN THE EVENING THEN
BECOMING PARTLY CLOUDY. WAVES 1 TO 2 FEET.
WEDNESDAY
WEST WIND 5 KNOTS BECOMING SOUTHEAST IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ146-191000-
PORT WING TO SAND ISLAND WI-
658 PM CDT MON MAY 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING
THROUGH TUESDAY MORNING...
REST OF TONIGHT
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO
20 KNOTS INCREASING TO 25 KNOTS LATE IN THE EVENING, THEN
DECREASING TO 20 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY IN THE
EVENING. CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS
AFTER MIDNIGHT. WAVES 1 TO 2 FEET BUILDING TO 3 TO 5 FEET AFTER
MIDNIGHT.
TUESDAY
WEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN THE
AFTERNOON. CHANCE OF RAIN SHOWERS IN THE MORNING. CHANCE OF
SPRINKLES IN THE AFTERNOON. WAVES 2 TO 4 FEET.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS. MOSTLY CLOUDY IN
THE EVENING THEN CLEARING. WAVES 1 TO 2 FEET.
WEDNESDAY
WEST WIND 5 KNOTS EARLY IN THE MORNING BECOMING
VARIABLE 10 KNOTS OR LESS, THEN BECOMING SOUTHEAST 5 KNOTS LATE
IN THE AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ147-191000-
SAND ISLAND TO BAYFIELD WI-
658 PM CDT MON MAY 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING
THROUGH TUESDAY MORNING...
REST OF TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS WITH GUSTS TO
AROUND 20 KNOTS RISING TO 15 TO 20 KNOTS WITH GUSTS TO AROUND
30 KNOTS IN THE LATE EVENING AND EARLY MORNING, THEN BECOMING
NORTH 10 TO 15 KNOTS WITH GUSTS TO AROUND 20 KNOTS TOWARD
DAYBREAK. RAIN SHOWERS LIKELY IN THE EVENING. CHANCE OF
THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER MIDNIGHT.
WAVES 1 TO 2 FEET BUILDING TO 3 TO 5 FEET AFTER MIDNIGHT.
TUESDAY
WEST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS IN THE
AFTERNOON. CHANCE OF RAIN SHOWERS IN THE MORNING. CHANCE OF
SPRINKLES IN THE AFTERNOON. WAVES 2 TO 4 FEET.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS. MOSTLY CLOUDY IN
THE EVENING THEN BECOMING PARTLY CLOUDY. WAVES 1 TO 3 FEET.
WEDNESDAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHEAST IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ150-191000-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
658 PM CDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON
REST OF TONIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 25 KNOTS RISING TO 20 TO 25 KNOTS WITH GALES TO AROUND
35 KNOTS IN THE LATE EVENING AND EARLY MORNING, THEN BECOMING
NORTH 15 TO 20 KNOTS WITH GUSTS TO AROUND 25 KNOTS TOWARD
DAYBREAK. CHANCE OF RAIN SHOWERS IN THE EVENING. CHANCE OF
THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER MIDNIGHT.
WAVES 1 TO 3 FEET BUILDING TO 4 TO 7 FEET. WAVES OCCASIONALLY TO
9 FEET.
TUESDAY
NORTHWEST WIND 5 TO 10 KNOTS BECOMING WEST 10 TO
15 KNOTS WITH GUSTS TO AROUND 20 KNOTS IN THE LATE MORNING AND
AFTERNOON. CHANCE OF RAIN SHOWERS IN THE MORNING. CHANCE OF
SPRINKLES IN THE AFTERNOON. WAVES 4 TO 6 FEET SUBSIDING TO 2 TO
4 FEET LATE IN THE AFTERNOON. WAVES OCCASIONALLY TO 7 FEET.
TUESDAY NIGHT
NORTHWEST WIND 10 TO 15 KNOTS EASING TO 5 TO
10 KNOTS IN THE LATE EVENING AND OVERNIGHT. MOSTLY CLOUDY IN THE
EVENING THEN BECOMING PARTLY CLOUDY. WAVES 1 TO 3 FEET SUBSIDING
TO 1 TO 2 FEET IN THE LATE EVENING AND OVERNIGHT.
WEDNESDAY
NORTHWEST WIND 5 KNOTS BECOMING SOUTHEAST IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ121-191000-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
658 PM CDT MON MAY 18 2026
REST OF TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS WITH GUSTS TO
AROUND 20 KNOTS RISING TO 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS IN THE LATE EVENING AND EARLY MORNING, THEN BECOMING
NORTH 5 TO 10 KNOTS TOWARD DAYBREAK. RAIN SHOWERS LIKELY IN THE
EVENING. CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS
AFTER MIDNIGHT. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET LATE IN
THE EVENING, THEN BUILDING TO 4 TO 7 FEET AFTER MIDNIGHT
SUBSIDING TO 1 TO 2 FEET TOWARD DAYBREAK. WAVES OCCASIONALLY TO
9 FEET.
TUESDAY
NORTHWEST WIND 5 KNOTS BECOMING WEST 10 TO 15 KNOTS
WITH GUSTS TO AROUND 20 KNOTS IN THE LATE MORNING AND AFTERNOON.
CHANCE OF RAIN SHOWERS IN THE MORNING. CHANCE OF SPRINKLES IN THE
AFTERNOON. WAVES 1 FOOT OR LESS.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO
20 KNOTS EARLY IN THE EVENING. MOSTLY CLOUDY IN THE EVENING THEN
BECOMING PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
WEDNESDAY
NORTHWEST WIND 5 KNOTS BECOMING EAST IN THE
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
LSZ148-191000-
OAK POINT TO SAXON HARBOR WI-
658 PM CDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON
REST OF TONIGHT
NORTHEAST WIND 5 TO 10 KNOTS WITH GUSTS TO
AROUND 20 KNOTS RISING TO 15 TO 20 KNOTS WITH GUSTS TO AROUND
25 KNOTS IN THE LATE EVENING AND EARLY MORNING, THEN BECOMING
NORTH 10 TO 15 KNOTS WITH GUSTS TO AROUND 20 KNOTS TOWARD
DAYBREAK. RAIN SHOWERS LIKELY IN THE EVENING. CHANCE OF
THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER MIDNIGHT.
WAVES 1 TO 3 FEET BUILDING TO 5 TO 8 FEET. WAVES OCCASIONALLY TO
10 FEET.
TUESDAY
NORTHWEST WIND 5 TO 10 KNOTS BECOMING WEST 10 TO
15 KNOTS WITH GUSTS TO AROUND 20 KNOTS IN THE LATE MORNING AND
AFTERNOON. CHANCE OF RAIN SHOWERS IN THE MORNING. CHANCE OF
SPRINKLES IN THE AFTERNOON. WAVES 2 TO 4 FEET.
TUESDAY NIGHT
NORTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO
20 KNOTS EARLY IN THE EVENING. MOSTLY CLOUDY IN THE EVENING THEN
BECOMING PARTLY CLOUDY. WAVES 1 TO 3 FEET.
WEDNESDAY
NORTHWEST WIND 5 KNOTS BECOMING NORTH LATE IN THE
MORNING, THEN BECOMING EAST 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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