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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt sun jul 26 2026


slz022-024-261500-
saint lawrence river from cape vincent to saint regis
403 am edt sun jul 26 2026

.today...south winds 10 knots or less becoming southwest. a
chance of showers and thunderstorms this afternoon. 
.tonight...southwest winds less than 10 knots. a chance of
showers and thunderstorms early. 
.monday...south winds less than 10 knots becoming southwest. a
chance of showers in the morning, then a chance of showers and
thunderstorms in the afternoon. 
.monday night...south winds less than 10 knots. a chance of
showers and thunderstorms in the evening, then showers likely
overnight. 
.tuesday...southeast winds 10 knots or less becoming northeast.
showers with a chance of thunderstorms. 
.wednesday...northeast winds 5 to 10 knots becoming north.
showers with a chance of thunderstorms. 
.thursday...north winds 5 to 10 knots becoming light and
variable. 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
402 am edt sun jul 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 30.2 inch surface high off the new england coast will
slowly weaken as it drifts to the gulf of saint lawrence today. a 
29.5 inch low will develop over the western great lakes tonight into 
monday, before strengthening to 29.3 inches while moving southeast 
into the lower great lakes monday night and tuesday. a cold front 
associated with this low will swing across the lake late tuesday and 
tuesday night. the low will then weaken to 29.6 inches while 
drifting east into new england by wednesday.


loz063>065-261500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sun jul 26 2026

.today...southwest winds 10 knots or less. waves 1 foot or less. 
.tonight...southwest winds less than 10 knots. a chance of
showers late. waves 1 foot or less. 
.monday...southwest winds 10 knots or less becoming east. a
chance of showers in the morning. waves 1 foot or less. 
.monday night...southeast winds 10 knots or less. a chance of
showers in the evening, then showers with a chance of
thunderstorms overnight. waves 1 foot or less. 
.tuesday...southeast winds 5 to 15 knots becoming northeast 15 to
20 knots. showers with a chance of thunderstorms. waves 1 to
3 feet. 
.wednesday...north winds 15 to 20 knots diminishing to 10 to
15 knots. showers likely with a chance of thunderstorms. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.thursday...north winds 5 to 15 knots becoming northwest less
than 10 knots. waves 1 to 3 feet subsiding to 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$