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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am edt wed aug 26 2026


slz022-024-262100-
saint lawrence river from cape vincent to saint regis
1002 am edt wed aug 26 2026

.this afternoon...southwest winds 10 knots or less. mostly sunny. 
.tonight...south winds 10 knots or less increasing to 10 to
15 knots. partly cloudy. 
.thursday...south winds 10 to 15 knots becoming southwest. a
chance of showers in the morning, then showers likely with a
chance of thunderstorms in the afternoon. 
.thursday night...southwest winds 10 knots or less becoming west.
showers likely with a chance of thunderstorms in the evening,
then a chance of showers overnight. 
.friday...northwest winds less than 10 knots. mostly cloudy, then
clearing. 
.saturday...light and variable winds. mainly clear. 
.sunday...southwest winds 5 to 10 knots. a chance of showers
sunday night. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt wed aug 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 30.1 inch high will drift off the new england coast 
today through tonight. a cold front will then cross the lower great 
lakes from west to east thursday. another 30.2 inch high will then 
build from the upper great lakes friday to the lower great lakes 
saturday before drifting off the new england coast sunday.


loz063>065-262100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt wed aug 26 2026

.this afternoon...southwest winds 5 to 10 knots becoming east.
waves 1 foot or less. 
.tonight...east winds 5 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.thursday...south winds 15 to 20 knots becoming southwest.
showers likely with a chance of thunderstorms. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.thursday night...southwest winds 5 to 15 knots becoming
northwest. a chance of showers and thunderstorms in the evening,
then a chance of showers overnight. waves 1 to 3 feet. 
.friday...northwest winds 10 knots or less. waves 2 feet or less.
.saturday...southwest winds 10 knots or less becoming south.
waves 1 foot or less. 
.sunday...southwest winds 5 to 15 knots. a chance of showers
sunday night. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$