FZUS61 KBUF 031402

GLFLO 



Open Lake Forecast for Lake Ontario

National Weather Service Buffalo NY

1002 AM 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...A weak cold front will slowly cross the Lower Great 

Lakes today. An expansive 30.1 inch area of high pressure will then 

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.



LOZ062-032100-

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

1002 AM EDT Thu Jul 3 2025



.REST OF TODAY...West winds around 10 knots. Waves 1 to 2 feet. 

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

1 to 2 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 becoming southwest. Waves

2 feet or less. 

.SUNDAY...Southwest winds 10 to 15 knots becoming west. A chance

of showers and thunderstorms Sunday night. Waves 1 to 3 feet. 

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

chance of showers and thunderstorms during the day. Waves 1 to

2 feet. 



Winds and waves higher in and near thunderstorms.



$$



LOZ063>065-032100-

Lake Ontario open waters from Hamlin Beach to the Saint Lawrence

River-

1002 AM EDT Thu Jul 3 2025



.REST OF TODAY...Northwest winds around 10 knots becoming west. A

chance of showers late this morning. Waves 1 to 2 feet. 

.TONIGHT...West winds 5 to 10 knots becoming north. Waves 2 feet

or less. 

.FRIDAY...North winds 5 to 10 knots becoming west. 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 15 knots. Waves 2 feet or less. 

.SUNDAY...Southwest winds 10 to 15 knots. A chance of showers and

thunderstorms Sunday night. Waves 1 to 3 feet. 

.MONDAY...West winds 5 to 10 knots becoming north. A chance of

showers and thunderstorms. Waves 1 to 3 feet subsiding to 1 foot

or less. 



Winds and waves higher in and near thunderstorms.



$$



LOZ061-032100-

MAFOR 0315/

ONTARIO WEST 1/2 13600 11710 11700 12800 11100. Waves 2 feet or

less. 



ONTARIO EAST 1/2 13600 12700 13800. Waves 2 feet or less. 



$$