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glflo 
expires:202607230900;;439628

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt wed jul 22 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 29.3 inch low over northern quebec tonight will move 
northeast and into the north atlantic by thursday night. meanwhile, 
a 30.2 inch high will build into the upper great lakes tonight, then 
move east across the lower great lakes thursday. this high will 
linger from the lower great lakes to new england friday through 
saturday before weakening and drifting off the east coast sunday.


loz062-230900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt wed jul 22 2026

.overnight...northwest winds 10 to 15 knots becoming west.
waves 1 to 3 feet. 
.thursday...west winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.thursday night...southwest winds 5 to 10 knots. waves 1 foot or
less. 
.friday...southwest winds 10 knots or less becoming northeast.
waves 1 foot or less. 
.friday night...east winds 5 to 10 knots becoming southeast.
waves 1 foot or less. 
.saturday...south winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.sunday...southwest winds 5 to 10 knots becoming northwest. a
chance of showers and thunderstorms. waves 1 foot or less. 
.monday...west winds 5 to 10 knots becoming southwest. a chance
of showers and thunderstorms. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 230203
glflo 
expires:202607230900;;439629

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt wed jul 22 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 29.3 inch low over northern quebec tonight will move 
northeast and into the north atlantic by thursday night. meanwhile, 
a 30.2 inch high will build into the upper great lakes tonight, then 
move east across the lower great lakes thursday. this high will 
linger from the lower great lakes to new england friday through 
saturday before weakening and drifting off the east coast sunday.


loz063>065-230900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt wed jul 22 2026

.overnight...northwest winds 5 to 15 knots becoming west.
waves 3 to 5 feet subsiding to 1 to 2 feet. 
.thursday...west winds 5 to 15 knots. waves 1 to 3 feet. 
.thursday night...west winds 5 to 15 knots becoming southwest.
waves 2 feet or less. 
.friday...south winds 5 to 10 knots becoming northeast. waves
1 foot or less. 
.friday night...east winds 10 knots or less becoming south. waves
1 foot or less. 
.saturday...south winds 5 to 15 knots. waves 2 feet or less. 
.sunday...southwest winds 5 to 15 knots becoming west 10 knots or
less. a chance of showers and thunderstorms. waves 2 feet or
less. 
.monday...west winds 10 knots or less becoming south. a chance of
showers. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

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glfsl 
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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt wed jul 22 2026


slz022-024-230900-
saint lawrence river from cape vincent to saint regis
1003 pm edt wed jul 22 2026

.overnight...southwest winds less than 10 knots. partly to
mostly cloudy. 
.thursday...southwest winds 10 knots or less increasing to 10 to
15 knots. sunny.
.thursday night...southwest winds 10 knots or less. mainly clear.
.friday...southwest winds 10 knots or less. sunny.
.friday night...southwest winds less than 10 knots. mainly clear.
.saturday...south winds 10 knots or less. mainly clear, then
becoming mostly cloudy. 
.sunday...south winds 5 to 10 knots becoming light and variable.
a chance of showers and thunderstorms. 
.monday...southwest winds less than 10 knots becoming south. a
chance of showers and thunderstorms. 

winds and waves higher in and near thunderstorms.

$$