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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt sun may 10 2026


slz022-024-101500-
saint lawrence river from cape vincent to saint regis
403 am edt sun may 10 2026

.today...southwest winds 5 to 15 knots. a chance of showers late.
.tonight...west winds 5 to 15 knots becoming southwest less than
10 knots. becoming mainly clear. 
.monday...west winds 10 knots or less. a chance of rain showers
in the afternoon. 
.monday night...west winds 5 to 10 knots becoming light and
variable. a chance of rain showers in the evening. 
.tuesday...northwest winds 10 knots or less becoming southeast. a
chance of rain showers tuesday night. 
.wednesday...southeast winds 5 to 15 knots becoming south.
showers.
.thursday...south winds 10 knots or less becoming north. showers
likely. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sun may 10 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 weak 29.5 inch low will move from the upper great 
lakes tonight to western quebec by early sunday before moving to 
northern quebec early monday. meanwhile, a trailing cold front will 
cross the lake tonight. a 30.4 inch high will then build from the 
upper great lakes monday to the lower great lakes by tuesday. a 29.8 
inch low will move across the lower great lakes into the ohio valley 
wednesday.


loz063>065-101500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sun may 10 2026

.today...west winds 10 to 15 knots increasing to 15 to 20 knots.
waves 1 to 3 feet building to 2 to 4 feet. 
.tonight...west winds 15 to 20 knots becoming northwest 5 to
15 knots. waves 2 to 4 feet subsiding to 1 foot or less. 
.monday...west winds 5 to 15 knots. waves 1 to 3 feet. 
.monday night...west winds 5 to 15 knots becoming northwest.
waves 1 to 3 feet. 
.tuesday...northwest winds 5 to 10 knots becoming southeast and
increasing to 15 to 20 knots. rain showers tuesday night. waves
2 feet or less. 
.wednesday...southeast winds 15 to 20 knots becoming southwest
10 to 15 knots. showers. waves 1 to 3 feet. 
.thursday...west winds 5 to 15 knots becoming northwest. a chance
of showers. waves 2 feet or less. 

$$