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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1004 pm edt sun aug 2 2026


slz022-024-030900-
saint lawrence river from cape vincent to saint regis
1004 pm edt sun aug 2 2026

.overnight...southeast winds 5 to 10 knots becoming south.
showers with a chance of thunderstorms. 
.monday...west winds 5 to 15 knots becoming northwest. showers
likely with a chance of thunderstorms in the morning, then a
chance of showers in the afternoon. 
.monday night...northwest winds 10 knots or less becoming west. a
chance of showers in the evening. 
.tuesday...west winds less than 10 knots becoming southwest.
sunny.
.tuesday night...southwest winds less than 10 knots. mainly
clear. 
.wednesday...south winds 10 knots or less. a chance of showers
wednesday night. 
.thursday...south winds 10 knots or less becoming southwest. a
chance of showers and thunderstorms. 
.friday...west winds less than 10 knots. a chance of showers. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt sun aug 2 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...an elongated 29.7 inch low will continue to move into 
the lower great lakes tonight, with a remnant trough drifting 
towards new england monday. a 30.0 inch high will then build east 
across ontario and quebec monday through tuesday.


loz062-030900-
lake ontario open waters from the niagara river to hamlin beach-
1003 pm edt sun aug 2 2026

.rest of tonight...northeast winds 10 to 15 knots becoming
northwest 15 to 20 knots. showers likely with a chance of
thunderstorms late this evening, then a chance of showers after
midnight. waves 1 to 3 feet building to 2 to 4 feet. 
.monday...northwest winds 15 to 20 knots becoming west. a chance
of showers early. waves 2 to 4 feet. 
.monday night...west winds 5 to 15 knots. waves 1 to 3 feet
subsiding to 1 foot or less. 
.tuesday...west winds less than 10 knots. waves 1 foot or less. 
.tuesday night...southeast winds 10 knots or less becoming south.
waves 1 foot or less. 
.wednesday...south winds less than 10 knots becoming southwest.
waves 1 foot or less. 
.thursday...southwest winds less than 10 knots becoming west. a
chance of showers thursday night. waves 1 foot or less. 
.friday...west winds less than 10 knots becoming southwest. a
chance of showers. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt sun aug 2 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...an elongated 29.7 inch low will continue to move into 
the lower great lakes tonight, with a remnant trough drifting 
towards new england monday. a 30.0 inch high will then build east 
across ontario and quebec monday through tuesday.


loz063>065-030900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 pm edt sun aug 2 2026

.rest of tonight...southeast winds 15 to 20 knots becoming
southwest. showers with a chance of thunderstorms. waves 2 to
4 feet. 
.monday...northwest winds 15 to 20 knots becoming west. a chance
of showers through early afternoon. waves 2 to 4 feet building to
3 to 5 feet. 
.monday night...west winds 15 to 20 knots becoming northwest 5 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday...west winds 5 to 10 knots. waves 2 feet or less. 
.tuesday night...southeast winds 10 knots or less becoming south.
waves 1 foot or less. 
.wednesday...south winds 10 knots or less. a chance of showers
wednesday night. waves 1 foot or less. 
.thursday...south winds 10 knots or less becoming west. a chance
of showers and thunderstorms. waves 1 foot or less. 
.friday...west winds 10 knots or less becoming southwest. a
chance of showers. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$