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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1004 am edt wed aug 5 2026


slz022-024-052100-
saint lawrence river from cape vincent to saint regis
1004 am edt wed aug 5 2026

.this afternoon...southwest winds 10 knots or less. sunny.
.tonight...south winds less than 10 knots. mainly clear early,
then becoming mostly cloudy. 
.thursday...south winds 10 knots or less becoming southwest. a
chance of showers in the morning, then a chance of showers and
thunderstorms in the afternoon. 
.thursday night...southwest winds less than 10 knots. a chance of
showers and thunderstorms in the evening. 
.friday...light and variable winds. a chance of showers and
thunderstorms during the day, then showers likely with a chance
of thunderstorms friday night. 
.saturday...southwest winds 5 to 10 knots. showers likely with a
chance of thunderstorms. 
.sunday...southwest winds 10 knots or less. 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 am edt wed aug 5 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 high pressure ridge averaging 30.0 inches will drift 
away from the region. a trough and cold front will then ever so 
slowly approach lake ontario from the northwest through this weekend.


loz063>065-052100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 am edt wed aug 5 2026

.this afternoon...south winds 10 knots or less becoming east.
waves 2 feet or less. 
.tonight...southeast winds 10 knots or less becoming south. waves
1 foot or less. 
.thursday...south winds 10 knots or less becoming west. a chance
of showers in the morning, then a chance of showers and
thunderstorms in the afternoon. waves 1 foot or less. 
.thursday night...south winds less than 10 knots becoming west.
waves 1 foot or less. 
.friday...southwest winds 10 knots or less becoming south.
showers likely with a chance of thunderstorms. waves 1 foot or
less. 
.saturday...southwest winds 5 to 15 knots becoming west. showers
likely with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms saturday night. waves 2 feet
or less. 
.sunday...west winds 5 to 15 knots becoming southwest. a chance
of showers. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$