FZUS61 KBUF 032002

GLFLO 



Open Lake Forecast for Lake Ontario

National Weather Service Buffalo NY

402 PM EDT Thu Jul 3 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...An expansive 30.1 inch area of high pressure will build 

eastward across the Great Lakes tonight and Friday...before drifting 

to the eastern seaboard Saturday. A wavy cold frontal boundary is 

then forecast to slowly push southeastward across the Upper Great 

Lakes and southern Ontario during Sunday, then across the Lower 

Great Lakes on Monday. A 30.1 inch surface high will build across 

the lower Great Lakes on Tuesday.



LOZ062-040300-

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

402 PM EDT Thu Jul 3 2025



.TONIGHT...Northwest winds 5 to 15 knots becoming north. Waves

1 to 3 feet. 

.FRIDAY...North winds 10 knots or less becoming southwest. Waves

1 foot or less. 

.FRIDAY NIGHT...South winds 5 to 10 knots. Waves 1 foot or less. 

.SATURDAY...South winds 5 to 15 knots. Waves 2 feet or less. 

.SATURDAY NIGHT...South winds 10 to 15 knots becoming southwest.

Waves 1 to 2 feet. 

.SUNDAY...Southwest winds 10 to 15 knots. Waves 1 to 3 feet. 

.MONDAY...Southwest winds around 10 knots becoming north. A

chance of showers and thunderstorms. Waves 1 to 2 feet. 

.TUESDAY...Northeast winds 5 to 10 knots becoming north. Waves

2 feet or less. 



Winds and waves higher in and near thunderstorms.



$$



LOZ063>065-040300-

Lake Ontario open waters from Hamlin Beach to the Saint Lawrence

River-

402 PM EDT Thu Jul 3 2025



.TONIGHT...West winds 5 to 15 knots becoming north. Waves 1 to

3 feet. 

.FRIDAY...North winds 5 to 10 knots becoming southwest. Waves

1 foot or less. 

.FRIDAY NIGHT...Southwest winds 5 to 10 knots becoming south.

Waves 1 foot or less. 

.SATURDAY...South winds 5 to 10 knots. Waves 1 foot or less. 

.SATURDAY NIGHT...South winds 5 to 15 knots. Waves 2 feet or

less. 

.SUNDAY...Southwest winds 5 to 15 knots becoming south. Waves

1 to 2 feet. 

.MONDAY...Southwest winds 5 to 10 knots becoming north. A chance

of showers and thunderstorms. Waves 1 to 2 feet. 

.TUESDAY...North winds 5 to 10 knots. A chance of showers during

the day. Waves 2 feet or less. 



Winds and waves higher in and near thunderstorms.



$$



LOZ061-040300-

MAFOR 0321/

ONTARIO WEST 1/2 12710 11700 13800 11600 11500. Waves 1 to 3 feet

tonight. Waves 1 foot or less Friday. 



ONTARIO EAST 1/2 11610 11700 14800 11600 11500. Waves 1 to 3 feet

tonight. Waves 1 foot or less Friday. 



$$