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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt thu sep 3 2026


slz022-024-032100-
saint lawrence river from cape vincent to saint regis
1003 am edt thu sep 3 2026

.this afternoon...southwest winds 10 knots or less becoming west.
mostly sunny. 
.tonight...west winds less than 10 knots. partly cloudy. 
.friday...light and variable winds. mostly sunny. 
.friday night...northwest winds less than 10 knots. partly
cloudy. 
.saturday...north winds 10 knots or less becoming northeast.
partly cloudy. 
.sunday...northeast winds less than 10 knots. mainly clear. 
.monday...light and variable winds. partly cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt thu sep 3 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 trough averaging 29.9 inches lingers over lake ontario 
through tonight. on friday through monday, a ridge averaging 30.1 
inches should affect the lake as the embedded high pressure center 
moves from northern ontario toward the mid-atlantic states. this 
ridge should then exit generally southward monday night through 
tuesday and allow a cold front to drift southward across lake 
ontario.


loz063>065-032100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt thu sep 3 2026

.this afternoon...west winds 5 to 10 knots. waves 2 feet or less. 
.tonight...west winds 5 to 10 knots becoming northwest. waves
1 foot or less. 
.friday...northwest winds 10 knots or less becoming west. waves
1 foot or less. 
.friday night...west winds 5 to 10 knots becoming north. waves
2 feet or less. 
.saturday...north winds 5 to 15 knots becoming northeast. waves
2 feet or less. 
.sunday...northeast winds 10 knots or less. waves 2 feet or less.
.monday...west winds 10 knots or less becoming southeast. waves
1 foot or less. 

$$