FZUS61 KBUF 202002

GLFLO 



Open Lake Forecast for Lake Ontario

National Weather Service Buffalo NY

402 PM EDT Sun Sep 20 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...

An 29.9 inch inverted trough draped from the Ohio Valley to New York 

State will drift southeastward and away from the lake this afternoon 

and tonight as a 30.4 inch high builds southeastward across Ontario 

Province. This high will then strengthen to 30.6 inches as it slowly 

drifts across Quebec through Thursday.



LOZ062-210300-

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

402 PM EDT Sun Sep 20 2026



.TONIGHT...North winds 5 to 10 knots becoming northeast and

increasing to 15 to 25 knots after midnight. Waves 1 to 3 feet

building to 5 to 7 feet. Waves occasionally around 9 feet. 

.MONDAY...Northeast winds 15 to 25 knots. Waves 3 to 6 feet. 

.MONDAY NIGHT...Northeast winds 15 to 25 knots. Waves 3 to 6 feet

building to 5 to 7 feet. Waves occasionally around 9 feet. 

.TUESDAY...Northeast winds 20 to 25 knots becoming east. Waves

5 to 8 feet. Waves occasionally around 10 feet. 

.TUESDAY NIGHT...East winds 15 to 25 knots. Waves 5 to 8 feet.

Waves occasionally around 10 feet. 

.WEDNESDAY...East winds 15 to 25 knots. Waves 3 to 6 feet. 

.THURSDAY...East winds 10 to 15 knots becoming northeast. Waves

2 to 4 feet. 

.FRIDAY...Northeast winds 5 to 15 knots. Waves 2 feet or less. 



$$



LOZ063>065-210300-

Lake Ontario open waters from Hamlin Beach to the Saint Lawrence

River-

402 PM EDT Sun Sep 20 2026



.TONIGHT...Northeast winds 10 to 15 knots increasing to 15 to

25 knots. Waves 1 to 3 feet building to 4 to 7 feet. Waves

occasionally around 9 feet. 

.MONDAY...Northeast winds 15 to 25 knots. Waves 4 to 7 feet

subsiding to 3 to 6 feet. Waves occasionally around 9 feet. 

.MONDAY NIGHT...Northeast winds 15 to 25 knots. Waves 2 to 4 feet

building to 4 to 7 feet. Waves occasionally around 9 feet. 

.TUESDAY...Northeast winds 15 to 25 knots. Waves 4 to 7 feet

subsiding to 3 to 6 feet. Waves occasionally around 9 feet. 

.TUESDAY NIGHT...Northeast winds 15 to 20 knots becoming east.

Waves 3 to 5 feet. 

.WEDNESDAY...East winds 15 to 20 knots. Waves 3 to 5 feet

subsiding to 2 to 4 feet. 

.THURSDAY...East winds 10 to 15 knots becoming northeast. Waves

2 to 4 feet subsiding to 1 to 3 feet. 

.FRIDAY...Northeast winds 10 to 15 knots. Waves 1 to 3 feet. 



$$



LOZ061-210300-

MAFOR 2021/

ONTARIO WEST 1/2 11800 11810 13130 13120. Waves 1 to 3 feet

building to 5 to 7 feet, and occasionally around 9 feet tonight.

Waves 4 to 7 feet subsiding to 3 to 6 feet, and occasionally

around 9 feet Monday. 



ONTARIO EAST 1/2 11100 11110 11120 13130 12120. Waves 1 to 3 feet

building to 4 to 7 feet, and occasionally around 9 feet tonight.

Waves 4 to 7 feet subsiding to 3 to 6 feet, and occasionally

around 9 feet Monday. 



$$