993  
FZUS53 KDLH 201329  
NSHDLH  
 
NEARSHORE MARINE FORECAST  
NATIONAL WEATHER SERVICE DULUTH MN  
829 AM CDT WED AUG 20 2025  
 
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.  
 
LSZ140-141-202215-  
GRAND PORTAGE TO GRAND MARAIS MN-  
GRAND MARAIS TO TACONITE HARBOR MN-  
829 AM CDT WED AUG 20 2025  
   
REST OF TODAY
 
NORTH WIND 5 KNOTS BECOMING EAST LATE IN THE  
MORNING, THEN BECOMING SOUTH IN THE AFTERNOON. PATCHY FOG LATE IN  
THE MORNING. AREAS OF FOG IN THE AFTERNOON. WAVES 1 FOOT OR LESS.   
TONIGHT
 
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING WEST IN THE LATE  
EVENING AND OVERNIGHT. AREAS OF DENSE FOG. WAVES 1 FOOT OR LESS.    
THURSDAY
 
WEST WIND 5 KNOTS BECOMING SOUTH IN THE LATE MORNING  
AND AFTERNOON. AREAS OF DENSE FOG IN THE MORNING. WAVES 1 FOOT OR  
LESS.    
THURSDAY NIGHT
 
SOUTH WIND 5 TO 10 KNOTS BECOMING SOUTHWEST  
AFTER MIDNIGHT. CHANCE OF SHOWERS AND THUNDERSTORMS AFTER  
MIDNIGHT. WAVES 1 FOOT OR LESS.  
 

 
 
LSZ142-143-202215-  
TACONITE HARBOR TO SILVER BAY HARBOR MN-  
SILVER BAY HARBOR TO TWO HARBORS MN-  
829 AM CDT WED AUG 20 2025  
   
REST OF TODAY
 
NORTHEAST WIND 5 KNOTS BECOMING SOUTHEAST IN THE  
AFTERNOON. PATCHY FOG EARLY IN THE AFTERNOON. AREAS OF FOG LATE.  
WAVES 1 FOOT OR LESS.    
TONIGHT
 
EAST WIND 5 KNOTS BECOMING NORTHEAST IN THE LATE  
EVENING AND OVERNIGHT. PATCHY FOG IN THE EVENING, THEN AREAS OF  
DENSE FOG AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.    
THURSDAY
 
NORTH WIND 5 KNOTS BECOMING SOUTHEAST IN THE LATE  
MORNING AND AFTERNOON. AREAS OF DENSE FOG IN THE MORNING. WAVES  
1 FOOT OR LESS.    
THURSDAY NIGHT
 
SOUTHEAST WIND 5 KNOTS BECOMING SOUTHWEST AFTER  
MIDNIGHT. CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.  
WAVES 1 FOOT OR LESS.  
 

 
 
LSZ144-145-202215-  
TWO HARBORS TO DULUTH MN-DULUTH MN TO PORT WING WI-  
829 AM CDT WED AUG 20 2025  
   
REST OF TODAY
 
NORTHEAST WIND 5 KNOTS. PATCHY FOG IN THE  
AFTERNOON. WAVES 1 FOOT OR LESS.    
TONIGHT
 
EAST WIND 5 KNOTS. AREAS OF DENSE FOG THROUGH THE  
NIGHT. WAVES 1 FOOT OR LESS.    
THURSDAY
 
EAST WIND 5 KNOTS. AREAS OF DENSE FOG IN THE MORNING.  
WAVES 1 FOOT OR LESS.    
THURSDAY NIGHT
 
SOUTHEAST WIND 5 KNOTS BECOMING SOUTHWEST EARLY  
IN THE MORNING. CHANCE OF SHOWERS AND THUNDERSTORMS AFTER  
MIDNIGHT. WAVES 1 FOOT OR LESS.  
 

 
 
LSZ146-202215-  
PORT WING TO SAND ISLAND WI-  
829 AM CDT WED AUG 20 2025  
   
REST OF TODAY
 
NORTHEAST WIND 5 KNOTS. PATCHY FOG EARLY IN THE  
MORNING. AREAS OF FOG LATE. WAVES 1 FOOT OR LESS.    
TONIGHT
 
EAST WIND 5 KNOTS BECOMING SOUTHEAST EARLY IN THE  
MORNING. PATCHY FOG IN THE EVENING, THEN AREAS OF DENSE FOG AFTER  
MIDNIGHT. WAVES 1 FOOT OR LESS.    
THURSDAY
 
SOUTH WIND 5 KNOTS BECOMING WEST LATE IN THE MORNING,  
THEN BECOMING NORTHEAST IN THE AFTERNOON. AREAS OF DENSE FOG IN  
THE MORNING. WAVES 1 FOOT OR LESS.    
THURSDAY NIGHT
 
SOUTHEAST WIND 5 KNOTS BECOMING SOUTHWEST IN  
THE LATE EVENING AND OVERNIGHT. CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.  
 

 
 
LSZ147-202215-  
SAND ISLAND TO BAYFIELD WI-  
829 AM CDT WED AUG 20 2025  
   
REST OF TODAY
 
NORTHEAST WIND 5 KNOTS BECOMING EAST LATE.  
MOSTLY CLOUDY EARLY IN THE MORNING THEN CLEARING. WAVES 1 FOOT OR  
LESS.    
TONIGHT
 
SOUTHEAST WIND 5 KNOTS. PATCHY FOG IN THE EVENING,  
THEN AREAS OF DENSE FOG AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.    
THURSDAY
 
SOUTH WIND 5 KNOTS BECOMING EAST IN THE AFTERNOON.  
AREAS OF DENSE FOG IN THE MORNING. WAVES 1 FOOT OR LESS.    
THURSDAY NIGHT
 
SOUTHEAST WIND 5 KNOTS BECOMING SOUTHWEST IN  
THE LATE EVENING AND OVERNIGHT. CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.  
 

 
 
LSZ150-202215-  
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-  
829 AM CDT WED AUG 20 2025  
   
REST OF TODAY
 
NORTHEAST WIND 5 KNOTS BECOMING SOUTHEAST LATE.  
PATCHY FOG EARLY IN THE AFTERNOON. AREAS OF FOG LATE. WAVES  
1 FOOT OR LESS.    
TONIGHT
 
SOUTHEAST WIND 5 KNOTS BECOMING EAST IN THE LATE  
EVENING AND EARLY MORNING, THEN BECOMING SOUTHEAST EARLY IN THE  
MORNING. AREAS OF DENSE FOG THROUGH THE NIGHT. WAVES 1 FOOT OR  
LESS.    
THURSDAY
 
SOUTH WIND 5 KNOTS BECOMING EAST LATE IN THE  
AFTERNOON. AREAS OF DENSE FOG IN THE MORNING. WAVES 1 FOOT OR  
LESS.    
THURSDAY NIGHT
 
SOUTHEAST WIND 5 KNOTS BECOMING SOUTHWEST EARLY  
IN THE MORNING. CHANCE OF SHOWERS AND SLIGHT CHANCE OF  
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.  
 

 
 
LSZ121-202215-  
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-  
829 AM CDT WED AUG 20 2025  
   
REST OF TODAY
 
NORTHEAST WIND 5 KNOTS. MOSTLY CLOUDY EARLY IN  
THE MORNING THEN CLEARING. WAVES 1 FOOT OR LESS.    
TONIGHT
 
EAST WIND 5 KNOTS BECOMING SOUTH EARLY IN THE MORNING.  
AREAS OF DENSE FOG THROUGH THE NIGHT. WAVES 1 FOOT OR LESS.    
THURSDAY
 
SOUTHWEST WIND 5 KNOTS BECOMING SOUTHEAST IN THE  
AFTERNOON. AREAS OF DENSE FOG IN THE MORNING. WAVES 1 FOOT OR  
LESS.    
THURSDAY NIGHT
 
SOUTHEAST WIND 5 KNOTS BECOMING SOUTHWEST IN  
THE LATE EVENING AND OVERNIGHT. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.  
 

 
 
LSZ148-202215-  
OAK POINT TO SAXON HARBOR WI-  
829 AM CDT WED AUG 20 2025  
   
REST OF TODAY
 
NORTHEAST WIND 5 KNOTS. PATCHY FOG IN THE  
AFTERNOON. WAVES 1 FOOT OR LESS.    
TONIGHT
 
EAST WIND 5 KNOTS BECOMING SOUTH EARLY IN THE MORNING.  
AREAS OF DENSE FOG. WAVES 1 FOOT OR LESS.    
THURSDAY
 
SOUTHWEST WIND 5 KNOTS BECOMING EAST IN THE  
AFTERNOON. AREAS OF DENSE FOG IN THE MORNING. WAVES 1 FOOT OR  
LESS.    
THURSDAY NIGHT
 
SOUTHEAST WIND 5 KNOTS BECOMING SOUTHWEST IN  
THE LATE EVENING AND OVERNIGHT. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.  
 

 
 
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:  
WEATHER.GOV/GREATLAKES  
 
PA  
 
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