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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon may 25 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 30.1 inch high will settle across the region through 
tuesday. a cold front associated with a 29.8 inch low over new 
england will drop south across the lake on wednesday morning. a 30.2 
inch surface high pressure over canada will start to expand south 
over the lake on thursday into friday.


loz063>065-251500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt mon may 25 2026

.today...southwest winds 5 to 15 knots becoming west. a chance of
showers early. areas of fog this morning. waves 2 feet or less. 
.tonight...west winds 5 to 15 knots becoming southwest. waves
2 feet or less. 
.tuesday...southwest winds 5 to 15 knots. waves 2 feet or less. 
.tuesday night...southwest winds 10 to 15 knots becoming west.
waves 1 to 3 feet. 
.wednesday...west winds 5 to 15 knots becoming north. waves 1 to
3 feet. 
.thursday...north winds 5 to 15 knots becoming west. waves 2 feet
or less. 
.friday...west winds 5 to 15 knots becoming northwest. waves 1 to
3 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt mon may 25 2026


slz022-024-251500-
saint lawrence river from cape vincent to saint regis
403 am edt mon may 25 2026

.today...south winds 10 knots or less becoming west. showers
early, then a chance of showers. 
.tonight...southwest winds 10 knots or less. partly cloudy. 
.tuesday...southwest winds 5 to 15 knots increasing to 15 to
20 knots. sunny.
.tuesday night...southwest winds 5 to 15 knots diminishing to
less than 10 knots. mainly clear. 
.wednesday...west winds 10 knots or less becoming north. partly
cloudy. 
.thursday...north winds 5 to 10 knots becoming light and
variable. partly cloudy. 
.friday...west winds 10 knots or less becoming northwest. a
chance of showers. 

$$