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open lake forecast for lake ontario
national weather service buffalo ny
1255 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>065-222115-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1255 pm edt wed jul 22 2026

.this afternoon...west winds 20 to 25 knots. scattered showers.
waves 6 to 9 feet. waves occasionally around 11 feet. 
.tonight...west winds 15 to 20 knots diminishing to 5 to
15 knots. waves 5 to 8 feet subsiding to 1 to 2 feet. waves
occasionally around 10 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 southeast. 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. 

winds and waves higher in and near thunderstorms.

$$

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


slz022-024-222100-
saint lawrence river from cape vincent to saint regis
1003 am edt wed jul 22 2026

.this afternoon...west winds 10 to 15 knots. a chance of showers. 
.tonight...west winds 5 to 15 knots becoming southwest less than
10 knots. mostly cloudy early, then becoming partly cloudy. 
.thursday...southwest winds 10 knots or less. sunny.
.thursday night...southwest winds 10 knots or less. mainly clear.
.friday...southwest winds less than 10 knots. mainly clear. 
.saturday...south winds 10 knots or less. mainly clear, then
becoming partly cloudy. 
.sunday...south winds 10 knots or less becoming southwest. a
chance of showers. 

$$