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open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt mon oct 26 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 ridge averaging 30.6 inches will affect the lake 
through thursday as the embedded high pressure center wobbles 
southeastward from near manitoba to north atlantic waters southeast 
of the canadian maritimes. the ridge exits eastward thursday night 
as a cold front sweeps eastward across the lake. behind the front, 
another ridge averaging 30.2 inches builds from the western great 
lakes through saturday.


loz063>065-270300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt mon oct 26 2026

.tonight...north winds 10 to 15 knots becoming northeast 15 to
20 knots. waves 1 to 3 feet building to 3 to 5 feet. 
.tuesday...northeast winds 5 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.tuesday night...northeast winds 5 to 10 knots becoming
southeast. waves 1 foot or less. 
.wednesday...southeast winds 10 knots or less. waves 1 foot or
less. 
.wednesday night...southeast winds 5 to 15 knots becoming south.
waves 1 to 3 feet. 
.thursday...south winds 10 to 15 knots becoming west. a chance of
showers thursday night. waves 1 to 3 feet building to 2 to
4 feet. 
.friday...west winds 5 to 15 knots becoming northwest. a chance
of showers during the day. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.saturday...northeast winds 10 knots or less becoming southeast.
waves 1 foot or less. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt mon oct 26 2026


slz022-024-270300-
saint lawrence river from cape vincent to saint regis
403 pm edt mon oct 26 2026

.tonight...northwest winds 5 to 10 knots becoming north. becoming
mainly clear. 
.tuesday...north winds 5 to 10 knots becoming light and variable.
sunny.
.tuesday night...light and variable winds. mainly clear in the
evening, then becoming partly cloudy. 
.wednesday...light and variable winds. partly to mostly sunny. 
.wednesday night...light and variable winds becoming south 5 to
10 knots. mostly cloudy. 
.thursday...southwest winds 5 to 15 knots. showers likely
thursday night. 
.friday...west winds 5 to 10 knots becoming light and variable. a
chance of rain showers during the day. 
.saturday...light and variable winds. partly to mostly cloudy. 

$$