272
FZUS53 KDLH 230518
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
1218 AM CDT THU JUL 23 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.
LSZ140-231600-
GRAND PORTAGE TO GRAND MARAIS MN-
1218 AM CDT THU JUL 23 2026
TODAY
SOUTHWEST WIND 15 TO 20 KNOTS. GUSTS UP TO 20 KNOTS
INCREASING TO 30 KNOTS. MOSTLY SUNNY. WAVES 1 TO 2 FEET BUILDING
TO 2 TO 4 FEET IN THE LATE MORNING AND AFTERNOON.
TONIGHT
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS
DECREASING TO 20 KNOTS IN THE LATE EVENING AND OVERNIGHT. PARTLY
CLOUDY. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET AFTER
MIDNIGHT.
FRIDAY
SOUTHWEST WIND 20 TO 25 KNOTS WITH GUSTS TO AROUND
30 KNOTS. SUNNY. WAVES 4 TO 6 FEET. WAVES OCCASIONALLY TO 8 FEET.
A SMALL CRAFT ADVISORY MAY BE NEEDED.
FRIDAY NIGHT
SOUTHWEST WIND 20 TO 25 KNOTS. GUSTS UP TO
30 KNOTS INCREASING TO 35 KNOTS IN THE LATE EVENING AND
OVERNIGHT. 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.
LSZ141-231600-
GRAND MARAIS TO TACONITE HARBOR MN-
1218 AM CDT THU JUL 23 2026
TODAY
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS.
SUNNY. WAVES 1 TO 3 FEET.
TONIGHT
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS
EARLY IN THE EVENING. MOSTLY CLEAR. WAVES 1 TO 3 FEET.
FRIDAY
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
LATE IN THE MORNING INCREASING TO 30 KNOTS, THEN DECREASING TO
25 KNOTS LATE IN THE AFTERNOON. SUNNY. WAVES 1 TO 2 FEET BUILDING
TO 1 TO 3 FEET IN THE AFTERNOON.
FRIDAY NIGHT
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 25 KNOTS. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING, THEN RAIN SHOWERS AND CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET AFTER MIDNIGHT.
LSZ142-231600-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
1218 AM CDT THU JUL 23 2026
TODAY
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS.
SUNNY. WAVES 1 TO 2 FEET.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS
EARLY IN THE EVENING. MOSTLY CLEAR. WAVES 1 TO 2 FEET.
FRIDAY
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
25 KNOTS. SUNNY. WAVES 1 TO 2 FEET.
FRIDAY NIGHT
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 25 KNOTS. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN
THE EVENING, THEN RAIN SHOWERS AND CHANCE OF THUNDERSTORMS AFTER
MIDNIGHT. WAVES 1 TO 3 FEET.
LSZ143-231600-
SILVER BAY HARBOR TO TWO HARBORS MN-
1218 AM CDT THU JUL 23 2026
TODAY
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS IN
THE LATE MORNING AND AFTERNOON. SUNNY. WAVES 1 TO 2 FEET.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS
EARLY IN THE EVENING. CLEAR. WAVES 1 TO 2 FEET.
FRIDAY
SOUTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 25 KNOTS.
SUNNY. WAVES 1 TO 2 FEET.
FRIDAY NIGHT
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 25 KNOTS. SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS AFTER
MIDNIGHT. WAVES 1 TO 2 FEET BUILDING TO 2 TO 4 FEET IN THE LATE
EVENING AND OVERNIGHT.
LSZ144-231600-
TWO HARBORS TO DULUTH MN-
1218 AM CDT THU JUL 23 2026
TODAY
SOUTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE LATE MORNING AND AFTERNOON. SUNNY. WAVES 1 TO 2 FEET.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS. CLEAR. WAVES 1 FOOT OR
LESS.
FRIDAY
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS IN
THE AFTERNOON. SUNNY. WAVES 1 TO 2 FEET.
FRIDAY NIGHT
SOUTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO
AROUND 25 KNOTS. CHANCE OF SHOWERS AND THUNDERSTORMS AFTER
MIDNIGHT. WAVES 1 TO 2 FEET BUILDING TO 2 TO 4 FEET IN THE LATE
EVENING AND OVERNIGHT.
LSZ145-231600-
DULUTH MN TO PORT WING WI-
1218 AM CDT THU JUL 23 2026
TODAY
SOUTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE LATE MORNING AND AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS. CLEAR. WAVES 1 FOOT OR
LESS.
FRIDAY
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS.
SUNNY. WAVES 1 TO 2 FEET.
FRIDAY NIGHT
SOUTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO
AROUND 25 KNOTS. CHANCE OF SHOWERS AND THUNDERSTORMS AFTER
MIDNIGHT. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET AFTER
MIDNIGHT.
LSZ146-231600-
PORT WING TO SAND ISLAND WI-
1218 AM CDT THU JUL 23 2026
TODAY
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
25 KNOTS EASING TO 10 KNOTS WITH GUSTS TO AROUND 20 KNOTS LATE IN
THE AFTERNOON. SUNNY. WAVES 1 TO 2 FEET.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS
EARLY IN THE EVENING. CLEAR. WAVES 1 FOOT OR LESS.
FRIDAY
SOUTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS IN
THE AFTERNOON. SUNNY. WAVES 1 TO 2 FEET.
FRIDAY NIGHT
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS INCREASING TO 25 KNOTS IN THE LATE EVENING AND
OVERNIGHT. CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.
WAVES 1 TO 3 FEET.
LSZ147-231600-
SAND ISLAND TO BAYFIELD WI-
1218 AM CDT THU JUL 23 2026
TODAY
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
INCREASING TO 25 KNOTS IN THE LATE MORNING AND EARLY AFTERNOON,
THEN DECREASING TO 20 KNOTS LATE IN THE AFTERNOON. SUNNY. WAVES
1 TO 2 FEET.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS. CLEAR. WAVES 1 FOOT OR
LESS.
FRIDAY
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS.
SUNNY. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO
20 KNOTS INCREASING TO 25 KNOTS IN THE LATE EVENING AND
OVERNIGHT. SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS AFTER
MIDNIGHT. WAVES 1 TO 2 FEET.
LSZ150-231600-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
1218 AM CDT THU JUL 23 2026
TODAY
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
INCREASING TO 25 KNOTS IN THE LATE MORNING AND AFTERNOON. SUNNY.
WAVES 1 TO 2 FEET.
TONIGHT
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
20 KNOTS. CLEAR. WAVES 1 TO 2 FEET.
FRIDAY
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS
EARLY IN THE MORNING THEN 20 KNOTS EARLY IN THE AFTERNOON, THEN
INCREASING TO 25 KNOTS LATE IN THE AFTERNOON. SUNNY. WAVES 1 TO
2 FEET.
FRIDAY NIGHT
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO
25 KNOTS INCREASING TO 30 KNOTS IN THE LATE EVENING AND
OVERNIGHT. SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
LSZ121-231600-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
1218 AM CDT THU JUL 23 2026
TODAY
SOUTHWEST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR
LESS.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS. CLEAR. WAVES 1 FOOT OR
LESS.
FRIDAY
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 25 KNOTS.
SUNNY. WAVES 1 TO 2 FEET.
FRIDAY NIGHT
SOUTHWEST WIND 15 TO 20 KNOTS WITH GUSTS TO
AROUND 25 KNOTS. CHANCE OF SHOWERS AND THUNDERSTORMS AFTER
MIDNIGHT. WAVES 1 TO 2 FEET.
LSZ148-231600-
OAK POINT TO SAXON HARBOR WI-
1218 AM CDT THU JUL 23 2026
TODAY
SOUTHWEST WIND 5 TO 10 KNOTS. GUSTS UP TO 20 KNOTS LATE
IN THE MORNING. SUNNY. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTHWEST WIND 5 TO 10 KNOTS. CLEAR. WAVES 1 FOOT OR
LESS.
FRIDAY
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND
25 KNOTS. SUNNY. WAVES 1 TO 2 FEET.
FRIDAY NIGHT
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO
AROUND 25 KNOTS. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 TO 2 FEET.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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