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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1005 am edt wed apr 22 2026


slz022-024-222100-
saint lawrence river from cape vincent to saint regis
1005 am edt wed apr 22 2026

.this afternoon...south winds less than 10 knots. partly to 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
1004 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 30.1 inch high will build across the great lakes today 
and thursday. a warm front will approach the lake friday. a 29.7 
inch low will move southwest of the lake saturday, followed by a 
30.2 inch high building across the lower great lakes saturday night 
and sunday.


loz062-222100-
lake ontario open waters from the niagara river to hamlin beach-
1004 am edt wed apr 22 2026

.this afternoon...northwest winds less than 10 knots becoming
southwest. waves 1 foot or less. 
.tonight...west winds 10 knots or less becoming north. waves
1 foot or less. 
.thursday...north winds less than 10 knots becoming southeast.
waves 1 foot or less. 
.thursday night...east winds 10 knots or less increasing to 10 to
15 knots. waves 2 feet or less. 
.friday...east winds 15 to 20 knots. a chance of rain showers
friday night. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...east winds 15 to 20 knots becoming northeast 10 to
15 knots. a chance of showers. waves 3 to 6 feet subsiding to
2 to 3 feet. 
.sunday...northeast winds 5 to 15 knots becoming east. waves 1 to
3 feet subsiding to 1 foot or less. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1004 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 30.1 inch high will build across the great lakes today 
and thursday. a warm front will approach the lake friday. a 29.7 
inch low will move southwest of the lake saturday, followed by a 
30.2 inch high building across the lower great lakes saturday night 
and sunday.


loz063>065-222100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1004 am edt wed apr 22 2026

.this afternoon...south winds 10 knots or less becoming west.
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. 

$$