215  
FZUS61 KBUF 102002  
GLFLO  
 
OPEN LAKE FORECAST FOR LAKE ONTARIO  
NATIONAL WEATHER SERVICE BUFFALO NY  
402 PM EDT WED SEP 10 2025  
 
FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE ONTARIO  
 
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.  
   
SYNOPSIS
 
A 30.3 INCH RIDGE OF HIGH PRESSURE WILL REMAIN IN PLACE  
FROM THE LOWER GREAT LAKES TO THE CANADIAN MARITIMES THROUGH  
TONIGHT. A WEAK COLD FRONT WILL THEN MOVE SOUTH ACROSS THE LAKE  
THURSDAY. ANOTHER 30.3 INCH HIGH CENTERED NEAR JAMES BAY THURSDAY  
WILL DRIFT SOUTHEAST ACROSS NEW ENGLAND FRIDAY, THEN REACH THE  
CANADIAN MARITIMES SATURDAY. A WEAK TROUGH OF LOW PRESSURE AVERAGING  
29.9 INCHES WILL THEN MOVE INTO THE LOWER GREAT LAKES SATURDAY NIGHT  
THROUGH SUNDAY.  
 
LOZ062-110300-  
LAKE ONTARIO OPEN WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH-  
402 PM EDT WED SEP 10 2025  
   
TONIGHT
 
EAST WINDS LESS THAN 10 KNOTS. WAVES 1 FOOT OR LESS.    
THURSDAY
 
NORTH WINDS LESS THAN 10 KNOTS. WAVES 1 FOOT OR LESS.   
THURSDAY NIGHT
 
LIGHT AND VARIABLE WINDS BECOMING EAST 5 TO  
10 KNOTS. WAVES 2 FEET OR LESS.    
FRIDAY
 
EAST WINDS 5 TO 10 KNOTS. WAVES 2 FEET OR LESS.    
FRIDAY NIGHT
 
EAST WINDS 10 KNOTS OR LESS BECOMING SOUTH. WAVES  
1 FOOT OR LESS.    
SATURDAY
 
SOUTHWEST WINDS 10 KNOTS OR LESS BECOMING WEST. A  
CHANCE OF SHOWERS SATURDAY NIGHT. WAVES 1 FOOT OR LESS.    
SUNDAY
 
NORTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST. A  
CHANCE OF SHOWERS. WAVES 1 TO 2 FEET.    
MONDAY
 
NORTHEAST WINDS 5 TO 10 KNOTS. WAVES 1 TO 2 FEET.  
 

 
 
LOZ063>065-110300-  
LAKE ONTARIO OPEN WATERS FROM HAMLIN BEACH TO THE SAINT LAWRENCE  
RIVER-  
402 PM EDT WED SEP 10 2025  
   
TONIGHT
 
LIGHT AND VARIABLE WINDS. WAVES 1 FOOT OR LESS.    
THURSDAY
 
NORTHWEST WINDS LESS THAN 10 KNOTS BECOMING NORTH.  
WAVES 1 FOOT OR LESS.    
THURSDAY NIGHT
 
NORTHWEST WINDS 5 TO 15 KNOTS BECOMING  
NORTHEAST. WAVES 2 FEET OR LESS.    
FRIDAY
 
NORTHEAST WINDS 10 KNOTS OR LESS. WAVES 2 FEET OR LESS.   
FRIDAY NIGHT
 
EAST WINDS 10 KNOTS OR LESS BECOMING SOUTH. WAVES  
1 FOOT OR LESS.    
SATURDAY
 
SOUTH WINDS 10 KNOTS OR LESS BECOMING SOUTHWEST. A  
CHANCE OF SHOWERS SATURDAY NIGHT. WAVES 1 FOOT OR LESS.    
SUNDAY
 
NORTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST. A  
CHANCE OF SHOWERS. WAVES 2 FEET OR LESS.    
MONDAY
 
NORTHEAST WINDS 5 TO 10 KNOTS BECOMING EAST. A CHANCE  
OF SHOWERS DURING THE DAY. WAVES 2 FEET OR LESS.  
 

 
 
LOZ061-110300-  
MAFOR 1021/  
ONTARIO WEST 1/2 11100 11300 11400 12700 11800 11100 11300. WAVES  
1 FOOT OR LESS.  
 
ONTARIO EAST 1/2 11100 11200 11500 12600 11700 12800. WAVES 1  
FOOT OR LESS.  
 

 
 
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