328
FZUS53 KDLH 201821
NSHDLH
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE DULUTH MN
121 PM CDT THU AUG 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.
LSZ140-202200-
GRAND PORTAGE TO GRAND MARAIS MN-
121 PM CDT THU AUG 20 2026
REST OF TODAY
SOUTHEAST WIND 5 KNOTS. CHANCE OF RAIN SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS. WAVES 1 FOOT OR LESS.
TONIGHT
EAST WIND 5 TO 10 KNOTS BECOMING NORTHEAST AFTER
MIDNIGHT. CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING. PATCHY FOG AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTHEAST EARLY
IN THE AFTERNOON, THEN BECOMING SOUTHWEST LATE IN THE AFTERNOON.
PATCHY FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING NORTHWEST
WITH GUSTS TO AROUND 20 KNOTS AFTER MIDNIGHT. SLIGHT CHANCE OF
RAIN SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
LSZ141-202200-
GRAND MARAIS TO TACONITE HARBOR MN-
121 PM CDT THU AUG 20 2026
REST OF TODAY
SOUTHEAST WIND 5 KNOTS. CHANCE OF RAIN SHOWERS
EARLY IN THE AFTERNOON. CHANCE OF THUNDERSTORMS THROUGH THE DAY.
RAIN SHOWERS LIKELY LATE. WAVES 1 FOOT OR LESS.
TONIGHT
EAST WIND 5 TO 10 KNOTS BECOMING NORTHEAST AFTER
MIDNIGHT. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING,
THEN SLIGHT CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. PATCHY FOG
AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 KNOTS BECOMING NORTH LATE IN THE
MORNING, THEN BECOMING SOUTHWEST IN THE AFTERNOON. PATCHY FOG IN
THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST IN THE
LATE EVENING AND OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
LSZ142-202200-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
121 PM CDT THU AUG 20 2026
REST OF TODAY
SOUTHEAST WIND 5 KNOTS. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 5 KNOTS. CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. PATCHY FOG AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 KNOTS BECOMING SOUTH IN THE AFTERNOON.
PATCHY FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST IN THE
LATE EVENING AND OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
LSZ143-202200-
SILVER BAY HARBOR TO TWO HARBORS MN-
121 PM CDT THU AUG 20 2026
REST OF TODAY
SOUTHEAST WIND 5 KNOTS. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 5 KNOTS. CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. PATCHY FOG AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 KNOTS BECOMING SOUTHEAST EARLY IN THE
AFTERNOON, THEN BECOMING SOUTH LATE IN THE AFTERNOON. PATCHY FOG
IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST IN THE
LATE EVENING AND OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
LSZ144-202200-
TWO HARBORS TO DULUTH MN-
121 PM CDT THU AUG 20 2026
REST OF TODAY
SOUTHEAST WIND 5 KNOTS. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 1 FOOT OR LESS.
TONIGHT
NORTHEAST WIND 5 KNOTS. CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. PATCHY FOG AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 KNOTS BECOMING NORTH LATE IN THE
MORNING, THEN BECOMING SOUTHWEST IN THE AFTERNOON. PATCHY FOG IN
THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST IN THE
LATE EVENING AND OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
LSZ145-202200-
DULUTH MN TO PORT WING WI-
121 PM CDT THU AUG 20 2026
REST OF TODAY
SOUTHEAST WIND 5 KNOTS. CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 1 FOOT OR LESS.
TONIGHT
EAST WIND 5 KNOTS BECOMING NORTHEAST AFTER MIDNIGHT.
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING, THEN SLIGHT
CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. PATCHY FOG AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
FRIDAY
NORTHEAST WIND 5 KNOTS BECOMING SOUTHWEST LATE IN THE
AFTERNOON. PATCHY FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING WEST IN THE LATE
EVENING AND OVERNIGHT. PARTLY CLOUDY. WAVES 1 FOOT OR LESS.
LSZ146-202200-
PORT WING TO SAND ISLAND WI-
121 PM CDT THU AUG 20 2026
REST OF TODAY
SOUTHEAST WIND 5 KNOTS. SLIGHT CHANCE OF
THUNDERSTORMS EARLY IN THE AFTERNOON. CHANCE OF SHOWERS THROUGH
THE DAY. CHANCE OF THUNDERSTORMS LATE. WAVES 1 FOOT OR LESS.
TONIGHT
EAST WIND 5 KNOTS BECOMING NORTHEAST AFTER MIDNIGHT.
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING. PATCHY FOG
AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
FRIDAY
NORTH WIND 5 KNOTS BECOMING NORTHWEST EARLY IN THE
AFTERNOON, THEN BECOMING SOUTHWEST LATE IN THE AFTERNOON. PATCHY
FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING WEST AFTER
MIDNIGHT. SLIGHT CHANCE OF SHOWERS. WAVES 1 FOOT OR LESS.
LSZ147-202200-
SAND ISLAND TO BAYFIELD WI-
121 PM CDT THU AUG 20 2026
REST OF TODAY
SOUTHEAST WIND 5 KNOTS. SLIGHT CHANCE OF
THUNDERSTORMS EARLY IN THE AFTERNOON. CHANCE OF SHOWERS THROUGH
THE DAY. CHANCE OF THUNDERSTORMS LATE. WAVES 1 FOOT OR LESS.
TONIGHT
EAST WIND 5 KNOTS BECOMING NORTHEAST AFTER MIDNIGHT.
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING. PATCHY FOG
AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
FRIDAY
NORTH WIND 5 KNOTS BECOMING WEST LATE IN THE AFTERNOON.
PATCHY FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
WEST WIND 5 KNOTS BECOMING NORTHWEST AFTER
MIDNIGHT. SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT
OR LESS.
LSZ150-202200-
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-
121 PM CDT THU AUG 20 2026
REST OF TODAY
SOUTH WIND 5 KNOTS. CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. WAVES 1 FOOT OR LESS.
TONIGHT
EAST WIND 5 KNOTS. CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE EVENING. PATCHY FOG AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
FRIDAY
NORTH WIND 5 KNOTS BECOMING WEST LATE IN THE AFTERNOON.
PATCHY FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST AFTER
MIDNIGHT. SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT
OR LESS.
LSZ121-202200-
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-
121 PM CDT THU AUG 20 2026
REST OF TODAY
SOUTH WIND 5 KNOTS. SLIGHT CHANCE OF
THUNDERSTORMS EARLY IN THE AFTERNOON. CHANCE OF SHOWERS THROUGH
THE DAY. CHANCE OF THUNDERSTORMS LATE. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTHEAST WIND 5 KNOTS. CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING, THEN SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. PATCHY FOG AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
FRIDAY
SOUTHWEST WIND 5 KNOTS BECOMING NORTH IN THE AFTERNOON.
PATCHY FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
WEST WIND 5 TO 10 KNOTS. CHANCE OF RAIN SHOWERS
AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
LSZ148-202200-
OAK POINT TO SAXON HARBOR WI-
121 PM CDT THU AUG 20 2026
REST OF TODAY
SOUTH WIND 5 KNOTS. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS EARLY IN THE AFTERNOON, THEN CHANCE OF SHOWERS AND
THUNDERSTORMS LATE. WAVES 1 FOOT OR LESS.
TONIGHT
SOUTH WIND 5 KNOTS. CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING, THEN SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. PATCHY FOG AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
FRIDAY
SOUTHWEST WIND 5 KNOTS BECOMING NORTHWEST IN THE LATE
MORNING AND EARLY AFTERNOON, THEN BECOMING NORTH LATE IN THE
AFTERNOON. PATCHY FOG IN THE MORNING. WAVES 1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WIND 5 KNOTS BECOMING WEST AFTER
MIDNIGHT. CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
WFO DLH
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