809  
FZUS53 KDLH 181822  
NSHDLH  
 
NEARSHORE MARINE FORECAST  
NATIONAL WEATHER SERVICE DULUTH MN  
122 PM CDT TUE AUG 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.  
 
LSZ140-182200-  
GRAND PORTAGE TO GRAND MARAIS MN-  
122 PM CDT TUE AUG 18 2026  
   
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING
 
 
   
REST OF TODAY
 
SOUTHWEST WIND 10 TO 15 KNOTS WITH GUSTS TO  
AROUND 20 KNOTS. MOSTLY SUNNY. WAVES 1 TO 3 FEET.    
TONIGHT
 
WEST WIND 10 TO 15 KNOTS WITH GUSTS TO AROUND 20 KNOTS  
BECOMING NORTHWEST 5 TO 10 KNOTS AFTER MIDNIGHT. MOSTLY CLEAR.  
WAVES 1 TO 3 FEET.    
WEDNESDAY
 
NORTHWEST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST  
10 TO 15 KNOTS WITH GUSTS TO AROUND 20 KNOTS IN THE LATE MORNING  
AND AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 2 FEET.    
WEDNESDAY NIGHT
 
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING  
NORTHWEST IN THE LATE EVENING AND EARLY MORNING, THEN BECOMING  
NORTH EARLY IN THE MORNING. PARTLY CLOUDY IN THE EVENING THEN  
BECOMING MOSTLY CLOUDY. WAVES 1 TO 2 FEET.  
 

 
 
LSZ141-182200-  
GRAND MARAIS TO TACONITE HARBOR MN-  
122 PM CDT TUE AUG 18 2026  
   
REST OF TODAY
 
SOUTHWEST WIND 5 TO 10 KNOTS WITH GUSTS TO  
AROUND 20 KNOTS. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.    
TONIGHT
 
WEST WIND 5 TO 10 KNOTS WITH GUSTS TO AROUND 20 KNOTS  
BECOMING NORTHWEST AFTER MIDNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR  
LESS.    
WEDNESDAY
 
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE  
LATE MORNING AND AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.    
WEDNESDAY NIGHT
 
SOUTHWEST WIND 5 KNOTS BECOMING NORTH IN THE  
LATE EVENING AND EARLY MORNING, THEN BECOMING VARIABLE 10 KNOTS  
OR LESS EARLY IN THE MORNING. PARTLY CLOUDY. WAVES 1 FOOT OR  
LESS.  
 

 
 
LSZ142-182200-  
TACONITE HARBOR TO SILVER BAY HARBOR MN-  
122 PM CDT TUE AUG 18 2026  
   
REST OF TODAY
 
SOUTHWEST WIND 5 KNOTS. MOSTLY SUNNY. WAVES  
1 FOOT OR LESS.    
TONIGHT
 
NORTHWEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR  
LESS.    
WEDNESDAY
 
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE  
LATE MORNING AND AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.    
WEDNESDAY NIGHT
 
SOUTHWEST WIND 5 KNOTS EARLY IN THE EVENING  
BECOMING VARIABLE 10 KNOTS OR LESS. PARTLY CLOUDY. WAVES 1 FOOT  
OR LESS.  
 

 
 
LSZ143-182200-  
SILVER BAY HARBOR TO TWO HARBORS MN-  
122 PM CDT TUE AUG 18 2026  
   
REST OF TODAY
 
SOUTHWEST WIND 5 KNOTS. MOSTLY SUNNY. WAVES  
1 FOOT OR LESS.    
TONIGHT
 
NORTHWEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR  
LESS.    
WEDNESDAY
 
NORTHWEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE  
LATE MORNING AND AFTERNOON. MOSTLY SUNNY. WAVES 1 FOOT OR LESS.    
WEDNESDAY NIGHT
 
SOUTHWEST WIND 5 KNOTS EARLY IN THE EVENING  
BECOMING VARIABLE 10 KNOTS OR LESS. PARTLY CLOUDY IN THE EVENING  
THEN BECOMING MOSTLY CLOUDY. WAVES 1 FOOT OR LESS.  
 

 
 
LSZ144-182200-  
TWO HARBORS TO DULUTH MN-  
122 PM CDT TUE AUG 18 2026  
   
REST OF TODAY
 
WEST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR  
LESS.    
TONIGHT
 
NORTHWEST WIND 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES  
1 FOOT OR LESS.    
WEDNESDAY
 
WEST WIND 5 KNOTS BECOMING SOUTHWEST IN THE LATE  
MORNING AND AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.    
WEDNESDAY NIGHT
 
WEST WIND 5 KNOTS BECOMING NORTH LATE IN THE  
EVENING, THEN BECOMING VARIABLE 10 KNOTS OR LESS AFTER MIDNIGHT  
BECOMING NORTHEAST 5 KNOTS EARLY IN THE MORNING. PARTLY CLOUDY.  
WAVES 1 FOOT OR LESS.  
 

 
 
LSZ145-182200-  
DULUTH MN TO PORT WING WI-  
122 PM CDT TUE AUG 18 2026  
   
REST OF TODAY
 
WEST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR  
LESS.    
TONIGHT
 
NORTHWEST WIND 5 TO 10 KNOTS BECOMING WEST EARLY IN  
THE MORNING. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.    
WEDNESDAY
 
WEST WIND 5 TO 10 KNOTS. SUNNY. WAVES 1 FOOT OR  
LESS.    
WEDNESDAY NIGHT
 
WEST WIND 5 KNOTS BECOMING SOUTH LATE IN THE  
EVENING, THEN BECOMING VARIABLE 10 KNOTS OR LESS AFTER MIDNIGHT  
BECOMING SOUTH 5 KNOTS EARLY IN THE MORNING. MOSTLY CLEAR. WAVES  
1 FOOT OR LESS.  
 

 
 
LSZ146-182200-  
PORT WING TO SAND ISLAND WI-  
122 PM CDT TUE AUG 18 2026  
   
REST OF TODAY
 
SOUTHWEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR  
LESS.    
TONIGHT
 
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.   
WEDNESDAY
 
SOUTHWEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.   
WEDNESDAY NIGHT
 
SOUTHWEST WIND 5 KNOTS EARLY IN THE EVENING  
BECOMING VARIABLE 10 KNOTS OR LESS. PARTLY CLOUDY. WAVES 1 FOOT  
OR LESS.  
 

 
 
LSZ147-182200-  
SAND ISLAND TO BAYFIELD WI-  
122 PM CDT TUE AUG 18 2026  
   
REST OF TODAY
 
WEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.    
TONIGHT
 
WEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.   
WEDNESDAY
 
WEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.    
WEDNESDAY NIGHT
 
VARIABLE WINDS 10 KNOTS OR LESS. PARTLY  
CLOUDY. WAVES 1 FOOT OR LESS.  
 

 
 
LSZ150-182200-  
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-  
122 PM CDT TUE AUG 18 2026  
   
REST OF TODAY
 
SOUTHWEST WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR  
LESS.    
TONIGHT
 
WEST WIND 5 KNOTS BECOMING NORTHWEST AFTER MIDNIGHT.  
MOSTLY CLEAR. WAVES 1 FOOT OR LESS.    
WEDNESDAY
 
WEST WIND 5 KNOTS BECOMING SOUTHWEST LATE IN THE  
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.    
WEDNESDAY NIGHT
 
SOUTHWEST WIND 5 KNOTS. PARTLY CLOUDY. WAVES  
1 FOOT OR LESS.  
 

 
 
LSZ121-182200-  
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-  
122 PM CDT TUE AUG 18 2026  
   
REST OF TODAY
 
NORTH WIND 5 KNOTS. SUNNY. WAVES 1 FOOT OR LESS.   
TONIGHT
 
NORTHWEST WIND 5 KNOTS. MOSTLY CLEAR. WAVES 1 FOOT OR  
LESS.    
WEDNESDAY
 
WEST WIND 5 KNOTS BECOMING NORTH LATE IN THE  
AFTERNOON. SUNNY. WAVES 1 FOOT OR LESS.    
WEDNESDAY NIGHT
 
EAST WIND 5 KNOTS EARLY IN THE EVENING  
BECOMING VARIABLE 10 KNOTS OR LESS, THEN BECOMING SOUTHWEST  
5 KNOTS EARLY IN THE MORNING. PARTLY CLOUDY. WAVES 1 FOOT OR  
LESS.  
 

 
 
LSZ148-182200-  
OAK POINT TO SAXON HARBOR WI-  
122 PM CDT TUE AUG 18 2026  
   
REST OF TODAY
 
NORTHEAST WIND 5 KNOTS BECOMING EAST LATE.  
SUNNY. WAVES 1 FOOT OR LESS.    
TONIGHT
 
SOUTHWEST WIND 5 KNOTS BECOMING WEST IN THE LATE  
EVENING AND OVERNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.    
WEDNESDAY
 
WEST WIND 5 KNOTS BECOMING NORTH EARLY IN THE  
AFTERNOON, THEN BECOMING EAST LATE IN THE AFTERNOON. SUNNY. WAVES  
1 FOOT OR LESS.    
WEDNESDAY NIGHT
 
SOUTHEAST WIND 5 KNOTS BECOMING SOUTH IN THE  
LATE EVENING AND OVERNIGHT. MOSTLY CLEAR. WAVES 1 FOOT OR LESS.  
 

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