FZUS61 KBUF 060202

GLFLO 



Open Lake Forecast for Lake Ontario

National Weather Service Buffalo NY

1002 PM 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 29.2 inch low over Hudson Bay this evening will weaken 

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

trailing wavy cold front will slowly cross the lake through tonight, 

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. A 29.6 inch low 

will track across the lake early Saturday, followed by a 29.7 inch 

low that will track near or just south of the lake for later Sunday.



LOZ062-060900-

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

1002 PM EDT Tue May 5 2026



.OVERNIGHT...South winds 5 to 10 knots becoming east. Rain,

then showers late. Waves 1 to 3 feet. 

.WEDNESDAY...East winds 10 knots or less becoming southwest.

Showers early, then a chance of showers late in the morning.

Waves 1 foot or less. 

.WEDNESDAY NIGHT...West winds 5 to 10 knots becoming northwest.

Waves 1 foot or less. 

.THURSDAY...West winds 5 to 10 knots. Waves 1 foot or less. 

.THURSDAY NIGHT...West winds 5 to 10 knots. Waves around 1 foot. 

.FRIDAY...West winds 5 to 10 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. 

.SUNDAY...Southwest winds 5 to 10 knots becoming northwest. A

chance of showers. Waves 1 to 2 feet. 



$$



LOZ063>065-060900-

Lake Ontario open waters from Hamlin Beach to the Saint Lawrence

River-

1002 PM EDT Tue May 5 2026



.OVERNIGHT...Southwest winds 10 knots or less becoming

southeast. Rain. Waves 3 to 5 feet subsiding to 1 to 3 feet. 

.WEDNESDAY...Northeast winds 5 to 10 knots becoming west. Rain

early, then showers likely late in the morning. Waves 2 feet or

less. 

.WEDNESDAY NIGHT...West winds 5 to 10 knots. Waves 2 feet or

less. 

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

.THURSDAY NIGHT...West winds 10 to 15 knots. Waves 1 to 2 feet. 

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

showers Friday night. Waves 2 feet or less. 

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

chance of showers. Waves 1 to 2 feet. 

.SUNDAY...Southwest winds 5 to 15 knots becoming northwest. A

chance of showers. Waves 1 to 2 feet. 



$$



LOZ061-060900-

MAFOR 0603/

ONTARIO WEST 1/2 11406 11306 11206 11200 11100 11600 11500 11600.

Waves 1 to 3 feet overnight. Waves 1 foot or less Wednesday and

Wednesday evening. 



ONTARIO EAST 1/2 11406 11306 11206 11106 11800 11700 12600. Waves

2 to 4 feet subsiding to 1 to 3 feet overnight. Waves 2 feet or

less Wednesday and Wednesday evening. 



$$