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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am edt sun oct 25 2026


slz022-024-252100-
saint lawrence river from cape vincent to saint regis
1002 am edt sun oct 25 2026

.this afternoon...south winds 10 knots or less becoming southwest.
sunny.
.tonight...southwest winds 5 to 10 knots. partly to mostly
cloudy. 
.monday...southwest winds 10 knots or less becoming northwest. a
chance of showers. 
.monday night...northwest winds 5 to 10 knots becoming north.
becoming mainly clear. 
.tuesday...north winds 5 to 10 knots becoming light and variable.
mainly clear. 
.wednesday...light and variable winds becoming south 10 to
15 knots. partly cloudy. 
.thursday...south winds 5 to 15 knots becoming west less than
10 knots. a chance of showers. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1001 am edt sun oct 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 ridge averaging 30.5 inches affects the lake through 
tonight as the embedded high pressure center moves from near lake 
champlain toward the mid-atlantic states. the ridge then exits 
southeastward as a weak cold front sweeps southeastward across the 
lake on monday. behind the front, another ridge averaging 30.5 
inches affects the lake through this thursday as the embedded high 
pressure center wobbles southeastward from near manitoba to north 
atlantic waters southeast of the canadian maritimes.


loz063>065-252100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1001 am edt sun oct 25 2026

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

$$