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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt wed jun 24 2026


slz022-024-250900-
saint lawrence river from cape vincent to saint regis
1003 pm edt wed jun 24 2026

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

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt wed jun 24 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 over the ohio valley this evening will 
drift to the eastern seaboard by thursday. a weak 29.9 inch low will 
then move from the central great lakes thursday to southern quebec 
friday, then the canadian maritimes saturday. a 30.1 inch high will 
then build across the lower great lakes saturday, expanding to the 
lower great lakes by sunday.


loz063>065-250900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt wed jun 24 2026

.overnight...west winds 5 to 10 knots becoming southwest.
waves 2 feet or less. 
.thursday...south winds 5 to 15 knots becoming east. a chance of
showers early, then showers. showers with a chance of
thunderstorms late. waves 1 foot or less. 
.thursday night...east winds 5 to 10 knots becoming southwest.
showers with a chance of thunderstorms in the evening, then
showers overnight. waves 1 foot or less. 
.friday...west winds 5 to 10 knots. a chance of showers in the
morning. waves 1 foot or less. 
.friday night...west winds 10 knots or less becoming east. waves
1 foot or less. 
.saturday...northeast winds 10 knots or less becoming northwest.
waves 1 foot or less. 
.sunday...north winds less than 10 knots. waves 1 foot or less. 
.monday...south winds 10 knots or less becoming southwest. a
chance of showers monday night. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$