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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
404 am edt wed apr 22 2026


slz022-024-221500-
saint lawrence river from cape vincent to saint regis
404 am edt wed apr 22 2026

.today...southeast winds less than 10 knots. mostly cloudy early,
then becoming mostly sunny. 
.tonight...light and variable winds. partly cloudy. 
.thursday...north winds 5 to 10 knots becoming northwest. mostly
sunny. 
.thursday night...northwest winds 10 knots or less becoming
north. partly cloudy. 
.friday...north winds 10 knots or less becoming east. mainly
clear. 
.saturday...northeast winds 10 knots or less becoming east.
partly to mostly cloudy. 
.sunday...northeast winds less than 10 knots. partly to mostly
cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
403 am edt wed apr 22 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 weak 29.4 inch low will cross the area tonight, and in 
the process drag an attendant cold front across the lake. a 30.1 
inch high will then build across the great lakes region wednesday 
and thursday. a warm front will approach the lake by friday. a 29.7 
inch low will move southwest of the lake on saturday, followed by a 
30.2 inch high building across the lake saturday night and sunday.


loz063>065-221500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 am edt wed apr 22 2026

.today...southeast winds 5 to 15 knots becoming west less than
10 knots. waves 2 feet or less. 
.tonight...west winds 10 knots or less becoming north. waves
1 foot or less. 
.thursday...north winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.thursday night...southwest winds 10 knots or less becoming
northeast. waves 1 foot or less. 
.friday...northeast winds 5 to 15 knots becoming east. waves 1 to
3 feet. 
.saturday...east winds 15 to 20 knots becoming southeast 10 to
15 knots. a chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.sunday...west winds 5 to 15 knots becoming northeast 10 knots or
less. waves 2 feet or less. 

$$