FZUS61 KBUF 050802

GLFLO 



Open Lake Forecast for Lake Ontario

National Weather Service Buffalo NY

402 AM EDT Tue May 5 2026



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 29.1 inch low over Hudson Bay today will weaken to 

29.3 inches as it moves to northern Quebec through Wednesday. A 

trailing wavy cold front will slowly cross the lake late this 

afternoon, then drift across New England Wednesday and out to sea 

Thursday. A 30.1 inch high over the Tennessee and Ohio Valleys 

Thursday night will slide to the mid-Atlantic coastline Friday.



LOZ062-051500-

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

402 AM EDT Tue May 5 2026



.TODAY...Southwest winds 15 to 20 knots becoming west. A chance

of showers early. A chance of showers early this afternoon, then

showers likely late. Waves 2 to 3 feet. 

.TONIGHT...West winds 15 to 20 knots becoming southeast and

diminishing to 5 to 10 knots. Showers. Waves 1 to 3 feet

subsiding to 1 foot or less. 

.WEDNESDAY...East winds 5 to 10 knots becoming south. Showers

likely. Waves 1 foot or less. 

.WEDNESDAY NIGHT...West winds 5 to 10 knots. Waves 1 foot or

less. 

.THURSDAY...West winds 5 to 10 knots. Waves 2 feet or less. 

.FRIDAY...West winds 5 to 15 knots becoming southwest. A chance

of showers Friday night. Waves 1 to 2 feet. 

.SATURDAY...Southwest winds 5 to 15 knots. A chance of showers.

Waves 1 to 2 feet. 



$$



LOZ063>065-051500-

Lake Ontario open waters from Hamlin Beach to the Saint Lawrence

River-

402 AM EDT Tue May 5 2026



.TODAY...Southwest winds 15 to 20 knots becoming west. A chance

of showers this morning, then a chance of showers and

thunderstorms early this afternoon. Showers likely with a chance

of thunderstorms late. Waves 2 to 4 feet. 

.TONIGHT...West winds 15 to 20 knots becoming southeast and

diminishing to 10 knots or less after midnight. Showers with a

chance of thunderstorms early, then showers from late evening on.

Waves 1 to 3 feet. 

.WEDNESDAY...East winds 5 to 10 knots becoming northwest.

Showers. Waves 1 foot or less. 

.WEDNESDAY NIGHT...West winds 5 to 10 knots. A chance of showers

in the evening. Waves 2 feet or less. 

.THURSDAY...West winds 5 to 15 knots. Waves 1 to 2 feet. 

.FRIDAY...West winds 5 to 15 knots becoming south. A chance of

showers Friday night. Waves 1 to 3 feet. 

.SATURDAY...South winds 5 to 15 knots becoming southwest. Showers

likely. Waves 1 to 2 feet. 



Winds and waves higher in and near thunderstorms.



$$



LOZ061-051500-

MAFOR 0509/

ONTARIO WEST 1/2 13520 11620 11626 11506 11400 11306. Waves 2 to

4 feet today. Waves 1 to 3 feet subsiding to 1 foot or less

tonight. 



ONTARIO EAST 1/2 11420 13520 11626 11606 11506 11406. Waves 1 to

3 feet building to 2 to 4 feet today. Waves 1 to 3 feet tonight. 



$$