841
FZUS53 KDLH 171000
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
500 AM CDT SUN MAY 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-
500 AM CDT SUN MAY 17 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING
TODAY
NORTHEAST WIND UP TO 30 KNOTS WITH GALES TO AROUND
35 KNOTS. SLIGHT CHANCE OF RAIN SHOWERS LATE IN THE AFTERNOON.
WAVES 1 TO 2 FEET BUILDING TO 4 TO 7 FEET. WAVES OCCASIONALLY TO
9 FEET.
TONIGHT
NORTHEAST WIND 20 TO 25 KNOTS. GUSTS UP TO 35 KNOTS
DECREASING TO 25 KNOTS. CHANCE OF RAIN SHOWERS IN THE EVENING.
SLIGHT CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS
AFTER MIDNIGHT. WAVES 4 TO 7 FEET. WAVES OCCASIONALLY TO 9 FEET.
A GALE WARNING MAY BE NEEDED.
MONDAY
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO 25 KNOTS
EARLY IN THE MORNING. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. WAVES 3 TO 5 FEET.
MONDAY NIGHT
NORTHEAST WIND UP TO 30 KNOTS WITH GALES TO
AROUND 35 KNOTS. CHANCE OF RAIN SHOWERS IN THE EVENING. SLIGHT
CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER
MIDNIGHT. WAVES 6 TO 9 FEET. WAVES OCCASIONALLY TO 11 FEET. A
GALE WARNING MAY BE NEEDED.
LSZ141-171600-
GRAND MARAIS TO TACONITE HARBOR MN-
500 AM CDT SUN MAY 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON
...GALE WARNING IN EFFECT FROM 1 PM CDT THIS AFTERNOON THROUGH
THIS EVENING...
TODAY
EAST WIND UP TO 30 KNOTS WITH GALES TO AROUND 35 KNOTS.
PARTLY SUNNY. WAVES 1 TO 2 FEET BUILDING TO 5 TO 8 FEET. WAVES
OCCASIONALLY TO 10 FEET.
TONIGHT
NORTHEAST WIND 20 TO 25 KNOTS. GUSTS UP TO 35 KNOTS
DECREASING TO 25 KNOTS. CHANCE OF RAIN SHOWERS IN THE EVENING.
CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER
MIDNIGHT. WAVES 5 TO 8 FEET SUBSIDING TO 4 TO 6 FEET EARLY IN THE
MORNING. WAVES OCCASIONALLY TO 11 FEET.
MONDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
EARLY IN THE MORNING. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET LATE IN
THE AFTERNOON. A SMALL CRAFT ADVISORY MAY BE NEEDED.
MONDAY NIGHT
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO
AROUND 30 KNOTS. 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 4 TO 6 FEET IN THE LATE
EVENING AND OVERNIGHT. WAVES OCCASIONALLY TO 8 FEET. A SMALL
CRAFT ADVISORY MAY BE NEEDED.
LSZ142-171600-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
500 AM CDT SUN MAY 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON
...GALE WARNING IN EFFECT FROM 1 PM CDT THIS AFTERNOON THROUGH
THIS EVENING...
TODAY
NORTHEAST WIND UP TO 30 KNOTS WITH GALES TO AROUND
35 KNOTS. MOSTLY SUNNY EARLY IN THE MORNING THEN BECOMING MOSTLY
CLOUDY. WAVES 1 TO 2 FEET BUILDING TO 6 TO 9 FEET. WAVES
OCCASIONALLY TO 12 FEET.
TONIGHT
NORTHEAST WIND 20 TO 25 KNOTS WITH GALES TO AROUND
35 KNOTS EASING TO 10 TO 15 KNOTS WITH GUSTS TO AROUND 25 KNOTS
EARLY IN THE MORNING. CHANCE OF RAIN SHOWERS IN THE EVENING.
CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER
MIDNIGHT. WAVES 7 TO 10 FEET SUBSIDING TO 4 TO 7 FEET EARLY IN
THE MORNING. WAVES OCCASIONALLY TO 13 FEET.
MONDAY
NORTHEAST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS
THROUGH THE DAY. SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET. WAVES OCCASIONALLY TO
7 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
MONDAY NIGHT
NORTHEAST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 25 KNOTS. 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 4 TO 7 FEET. WAVES
OCCASIONALLY TO 9 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ143-171600-
SILVER BAY HARBOR TO TWO HARBORS MN-
500 AM CDT SUN MAY 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING
...GALE WARNING IN EFFECT FROM 10 AM CDT THIS MORNING THROUGH
THIS EVENING...
TODAY
NORTHEAST WIND UP TO 30 KNOTS WITH GALES TO AROUND
35 KNOTS. PARTLY SUNNY. WAVES 3 TO 5 FEET BUILDING TO 6 TO 9 FEET
IN THE AFTERNOON. WAVES OCCASIONALLY TO 12 FEET.
TONIGHT
NORTHEAST WIND UP TO 30 KNOTS WITH GALES TO AROUND
35 KNOTS EASING TO 15 TO 20 KNOTS WITH GUSTS TO AROUND 25 KNOTS
EARLY IN THE MORNING. RAIN SHOWERS LIKELY IN THE EVENING. CHANCE
OF THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER MIDNIGHT.
WAVES 7 TO 10 FEET SUBSIDING TO 4 TO 7 FEET EARLY IN THE MORNING.
WAVES OCCASIONALLY TO 13 FEET.
MONDAY
NORTHEAST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS THROUGH THE DAY. WAVES 3 TO
5 FEET SUBSIDING TO 1 TO 3 FEET. WAVES OCCASIONALLY TO 7 FEET. A
SMALL CRAFT ADVISORY MAY BE NEEDED.
MONDAY NIGHT
NORTHEAST WIND 5 TO 10 KNOTS RISING TO 20 TO
25 KNOTS WITH GUSTS TO AROUND 30 KNOTS IN THE LATE EVENING AND
OVERNIGHT. RAIN SHOWERS LIKELY IN THE EVENING. SLIGHT CHANCE OF
THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER MIDNIGHT.
WAVES 1 TO 2 FEET BUILDING TO 4 TO 7 FEET. WAVES OCCASIONALLY TO
9 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ144-171600-
TWO HARBORS TO DULUTH MN-
500 AM CDT SUN MAY 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING
...GALE WARNING IN EFFECT FROM 10 AM CDT THIS MORNING THROUGH
THIS EVENING...
TODAY
NORTHEAST WIND UP TO 30 KNOTS WITH GALES TO AROUND
35 KNOTS. PARTLY SUNNY. WAVES 7 TO 10 FEET. WAVES OCCASIONALLY TO
13 FEET.
TONIGHT
NORTHEAST WIND UP TO 30 KNOTS WITH GALES TO AROUND
35 KNOTS EASING TO 15 TO 20 KNOTS WITH GUSTS TO AROUND 25 KNOTS
EARLY IN THE MORNING. RAIN SHOWERS LIKELY IN THE EVENING. CHANCE
OF THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER MIDNIGHT.
WAVES 7 TO 10 FEET SUBSIDING TO 4 TO 7 FEET EARLY IN THE MORNING.
WAVES OCCASIONALLY TO 14 FEET.
MONDAY
NORTHEAST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS THROUGH THE DAY. WAVES 3 TO
5 FEET SUBSIDING TO 1 TO 2 FEET LATE IN THE AFTERNOON. A SMALL
CRAFT ADVISORY MAY BE NEEDED.
MONDAY NIGHT
NORTHEAST WIND UP TO 30 KNOTS WITH GALES TO
AROUND 35 KNOTS. 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 5 TO 8 FEET. WAVES
OCCASIONALLY TO 11 FEET. A GALE WARNING MAY BE NEEDED.
LSZ145-171600-
DULUTH MN TO PORT WING WI-
500 AM CDT SUN MAY 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING
...GALE WARNING IN EFFECT FROM 10 AM CDT THIS MORNING THROUGH
THIS EVENING...
TODAY
NORTHEAST WIND UP TO 30 KNOTS WITH GALES TO AROUND
35 KNOTS. PARTLY SUNNY. WAVES 7 TO 10 FEET. WAVES OCCASIONALLY TO
12 FEET.
TONIGHT
NORTHEAST WIND UP TO 30 KNOTS WITH GALES TO AROUND
40 KNOTS EASING TO 15 TO 20 KNOTS EARLY IN THE MORNING. RAIN
SHOWERS LIKELY IN THE EVENING. CHANCE OF THUNDERSTORMS THROUGH
THE NIGHT. RAIN SHOWERS AFTER MIDNIGHT. WAVES 7 TO 10 FEET
SUBSIDING TO 4 TO 6 FEET EARLY IN THE MORNING. WAVES OCCASIONALLY
TO 14 FEET.
MONDAY
NORTHEAST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS THROUGH THE DAY. WAVES 3 TO
5 FEET SUBSIDING TO 1 TO 3 FEET IN THE AFTERNOON. A SMALL CRAFT
ADVISORY MAY BE NEEDED.
MONDAY NIGHT
NORTHEAST WIND UP TO 30 KNOTS WITH GALES TO
AROUND 35 KNOTS. RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS.
WAVES 2 TO 4 FEET BUILDING TO 6 TO 9 FEET IN THE LATE EVENING AND
OVERNIGHT. WAVES OCCASIONALLY TO 11 FEET. A GALE WARNING MAY BE
NEEDED.
LSZ146-171600-
PORT WING TO SAND ISLAND WI-
500 AM CDT SUN MAY 17 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
TODAY
NORTHEAST WIND 20 TO 25 KNOTS. GUSTS UP TO 25 KNOTS
INCREASING TO 35 KNOTS. PARTLY SUNNY. WAVES 2 TO 4 FEET BUILDING
TO 5 TO 8 FEET. WAVES OCCASIONALLY TO 11 FEET.
TONIGHT
NORTHEAST WIND 20 TO 25 KNOTS WITH GUSTS TO AROUND
30 KNOTS EASING TO 10 TO 15 KNOTS WITH GUSTS TO AROUND 20 KNOTS
EARLY IN THE MORNING. CHANCE OF RAIN SHOWERS IN THE EVENING.
CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER
MIDNIGHT. WAVES 6 TO 9 FEET SUBSIDING TO 4 TO 6 FEET EARLY IN THE
MORNING. WAVES OCCASIONALLY TO 12 FEET.
MONDAY
NORTHEAST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS THROUGH THE DAY. WAVES 3 TO
5 FEET SUBSIDING TO 1 TO 3 FEET IN THE AFTERNOON. A SMALL CRAFT
ADVISORY MAY BE NEEDED.
MONDAY NIGHT
NORTHEAST WIND 20 TO 25 KNOTS WITH GUSTS TO
AROUND 30 KNOTS. 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 5 TO 8 FEET. WAVES
OCCASIONALLY TO 10 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ147-171600-
SAND ISLAND TO BAYFIELD WI-
500 AM CDT SUN MAY 17 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
TODAY
EAST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND 25 KNOTS
BECOMING NORTHEAST 20 TO 25 KNOTS WITH GALES TO AROUND 35 KNOTS
IN THE AFTERNOON. PARTLY SUNNY. WAVES 1 TO 2 FEET BUILDING TO
5 TO 8 FEET. WAVES OCCASIONALLY TO 11 FEET.
TONIGHT
NORTHEAST WIND 20 TO 25 KNOTS WITH GALES TO AROUND
35 KNOTS EASING TO 10 TO 15 KNOTS WITH GUSTS TO AROUND 20 KNOTS
EARLY IN THE MORNING. RAIN SHOWERS LIKELY IN THE EVENING. CHANCE
OF THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER MIDNIGHT.
WAVES 5 TO 8 FEET SUBSIDING TO 4 TO 6 FEET EARLY IN THE MORNING.
WAVES OCCASIONALLY TO 11 FEET. A GALE WARNING MAY BE NEEDED.
MONDAY
NORTHEAST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS. WAVES 2 TO 4 FEET SUBSIDING
TO 1 TO 3 FEET IN THE AFTERNOON. A SMALL CRAFT ADVISORY MAY BE
NEEDED.
MONDAY NIGHT
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO
AROUND 30 KNOTS. RAIN SHOWERS LIKELY IN THE EVENING. SLIGHT
CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER
MIDNIGHT. WAVES 3 TO 5 FEET BUILDING TO 5 TO 8 FEET AFTER
MIDNIGHT. WAVES OCCASIONALLY TO 11 FEET. A SMALL CRAFT ADVISORY
MAY BE NEEDED.
LSZ150-171600-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
500 AM CDT SUN MAY 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON
...GALE WARNING IN EFFECT FROM 1 PM CDT THIS AFTERNOON THROUGH
THIS EVENING...
TODAY
NORTHEAST WIND UP TO 30 KNOTS WITH GALES TO AROUND
35 KNOTS. PARTLY SUNNY. WAVES 1 TO 3 FEET BUILDING TO 6 TO
9 FEET. WAVES OCCASIONALLY TO 12 FEET.
TONIGHT
NORTHEAST WIND UP TO 30 KNOTS WITH GALES TO AROUND
35 KNOTS EASING TO 15 TO 20 KNOTS WITH GUSTS TO AROUND 25 KNOTS
AFTER MIDNIGHT. CHANCE OF RAIN SHOWERS IN THE EVENING. CHANCE OF
THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS LIKELY AFTER
MIDNIGHT. WAVES 7 TO 10 FEET SUBSIDING TO 4 TO 7 FEET EARLY IN
THE MORNING. WAVES OCCASIONALLY TO 13 FEET.
MONDAY
NORTHEAST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
LATE IN THE AFTERNOON. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. WAVES 3 TO 5 FEET SUBSIDING TO 2 TO 4 FEET IN
THE AFTERNOON. WAVES OCCASIONALLY TO 7 FEET. A SMALL CRAFT
ADVISORY MAY BE NEEDED.
MONDAY NIGHT
NORTHEAST WIND 20 TO 25 KNOTS WITH GUSTS TO
AROUND 30 KNOTS. CHANCE OF RAIN SHOWERS IN THE EVENING. SLIGHT
CHANCE OF THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER
MIDNIGHT. WAVES 3 TO 5 FEET BUILDING TO 7 TO 10 FEET. WAVES
OCCASIONALLY TO 13 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ121-171600-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
500 AM CDT SUN MAY 17 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
TODAY
NORTHEAST WIND 15 TO 20 KNOTS. GUSTS UP TO 20 KNOTS
INCREASING TO 30 KNOTS. PARTLY SUNNY. WAVES 1 TO 3 FEET.
TONIGHT
NORTHEAST WIND 15 TO 20 KNOTS WITH GUSTS TO AROUND
30 KNOTS EASING TO 5 TO 10 KNOTS EARLY IN THE MORNING. RAIN
SHOWERS LIKELY IN THE EVENING. CHANCE OF THUNDERSTORMS THROUGH
THE NIGHT. RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
MONDAY
NORTH WIND 5 KNOTS BECOMING NORTHEAST IN THE LATE
MORNING AND AFTERNOON. CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES
1 FOOT OR LESS.
MONDAY NIGHT
NORTHEAST WIND 20 TO 25 KNOTS WITH GUSTS TO
AROUND 30 KNOTS. CHANCE OF RAIN SHOWERS IN THE EVENING. CHANCE OF
THUNDERSTORMS THROUGH THE NIGHT. RAIN SHOWERS AFTER MIDNIGHT.
WAVES 1 TO 3 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
LSZ148-171600-
OAK POINT TO SAXON HARBOR WI-
500 AM CDT SUN MAY 17 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
TODAY
NORTHEAST WIND 20 TO 25 KNOTS WITH GUSTS TO AROUND
30 KNOTS. PARTLY SUNNY. WAVES 1 TO 2 FEET BUILDING TO 4 TO
7 FEET. WAVES OCCASIONALLY TO 9 FEET.
TONIGHT
NORTHEAST WIND 20 TO 25 KNOTS WITH GUSTS TO AROUND
30 KNOTS EASING TO 10 TO 15 KNOTS WITH GUSTS TO AROUND 20 KNOTS
AFTER MIDNIGHT. RAIN SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS
THROUGH THE NIGHT. WAVES 4 TO 7 FEET SUBSIDING TO 2 TO 4 FEET
EARLY IN THE MORNING. WAVES OCCASIONALLY TO 9 FEET.
MONDAY
NORTHWEST WIND 5 TO 10 KNOTS BECOMING NORTHEAST IN THE
LATE MORNING AND AFTERNOON. SLIGHT CHANCE OF THUNDERSTORMS IN THE
MORNING. CHANCE OF RAIN SHOWERS THROUGH THE DAY. CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. WAVES 2 TO 4 FEET SUBSIDING TO
1 TO 3 FEET IN THE AFTERNOON.
MONDAY NIGHT
NORTHEAST WIND 20 TO 25 KNOTS WITH GUSTS TO
AROUND 30 KNOTS. RAIN SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS
IN THE EVENING, THEN RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. WAVES 5 TO 8 FEET. WAVES
OCCASIONALLY TO 10 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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