FZUS61 KBUF 092001

GLFLO 



Open Lake Forecast for Lake Ontario

National Weather Service Buffalo NY

401 PM EDT Fri May 9 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 29.8 inch low near southern New England this evening 

will move north along the New England coastline, deepening to 29.5 

inches as it reaches the Gulf of Maine tomorrow, then into the 

Canadian Maritimes tomorrow night. A 30.4 inch high will then build 

from northwest Ontario province tomorrow to the lower Great Lakes 

Sunday before moving off the southern New England coast Monday, and 

then farther offshore of the Mid Atlantic Tuesday and Wednesday, 

while a 29.4 inch low develops in the western High Plains.



LOZ062-100300-

Lake Ontario open waters from the Niagara River to Hamlin Beach-

401 PM EDT Fri May 9 2025



.TONIGHT...West winds 10 to 15 knots becoming northwest. Waves

1 to 3 feet. 

.SATURDAY...West winds 10 to 15 knots. Waves 1 to 3 feet. 

.SATURDAY NIGHT...West winds 10 to 15 knots becoming north. Waves

1 to 3 feet. 

.SUNDAY...North winds 5 to 10 knots becoming southeast. Waves

2 feet or less. 

.SUNDAY NIGHT...Southeast winds 5 to 10 knots. Waves 1 foot or

less. 

.MONDAY...Southwest winds 5 to 10 knots becoming south. Waves

1 foot or less. 

.TUESDAY...Southeast winds 5 to 10 knots. A chance of showers

Tuesday night. Waves 2 feet or less. 

.WEDNESDAY...East winds 5 to 10 knots. A chance of showers. Waves

1 to 2 feet. 



$$



LOZ063>065-100300-

Lake Ontario open waters from Hamlin Beach to the Saint Lawrence

River-

401 PM EDT Fri May 9 2025



.TONIGHT...Northwest winds 10 to 15 knots. A chance of rain

through the early overnight. Waves 1 to 3 feet. 

.SATURDAY...Northwest winds 10 to 15 knots becoming west 15 to

20 knots. Waves 1 to 3 feet building to 3 to 5 feet. 

.SATURDAY NIGHT...West winds 15 to 20 knots becoming north 10 to

15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet. 

.SUNDAY...North winds 5 to 15 knots becoming west. Waves 1 to

3 feet subsiding to 1 foot or less. 

.SUNDAY NIGHT...Southwest winds 10 knots or less becoming

southeast. Waves 1 foot or less. 

.MONDAY...West winds 5 to 10 knots becoming south. Waves 2 feet

or less. 

.TUESDAY...South winds 5 to 10 knots becoming southeast. Waves

2 feet or less. 

.WEDNESDAY...Southeast winds 5 to 10 knots. A chance of showers.

Waves 2 feet or less. 



$$



LOZ061-100300-

MAFOR 0921/

ONTARIO WEST 1/2 11600 11700 12710 14610. Waves 1 to 3 feet. 



ONTARIO EAST 1/2 14710 11710 11610 12620. A chance of rain

tonight. Waves 1 to 3 feet tonight. Waves 1 to 3 feet building to

3 to 5 feet Saturday. 



$$