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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 10 2026


slz022-024-102100-
saint lawrence river from cape vincent to saint regis
1003 am edt thu sep 10 2026

.this afternoon...west winds 10 to 15 knots. mostly sunny. 
.tonight...northwest winds 5 to 10 knots becoming light and
variable. mostly cloudy early, then clearing. 
.friday...light and variable winds. sunny.
.friday night...southwest winds less than 10 knots becoming
south. mainly clear. 
.saturday...south winds 5 to 15 knots. a chance of showers
saturday night. 
.sunday...southwest winds 10 knots or less becoming northwest. a
chance of showers. 
.monday...north winds 10 knots or less becoming southeast. a
chance of showers monday night. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt thu sep 10 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 high pressure ridge averaging 30.0 inches will 
build from the western great lakes through friday, before exiting 
east toward the new england coast on saturday. a warm front will 
sweep northeastward across lake ontario saturday night and be 
followed by a cold front sweeping eastward across the lake later on 
sunday. behind the cold front, a 30.1 inch ridge will slide eastward 
across the lake through monday, then moves east into new england by 
tuesday.


loz062-102100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt thu sep 10 2026

.this afternoon...west winds 10 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.tonight...northwest winds 15 to 20 knots diminishing to 5 to
15 knots. waves 1 to 3 feet. 
.friday...northwest winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.friday night...southwest winds 10 knots or less becoming south.
waves 1 foot or less. 
.saturday...south winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.sunday...west winds 10 to 15 knots becoming northwest. waves
1 to 2 feet. 
.monday...north winds 5 to 15 knots becoming southeast. waves
1 to 3 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt thu sep 10 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 high pressure ridge averaging 30.0 inches will 
build from the western great lakes through friday, before exiting 
east toward the new england coast on saturday. a warm front will 
sweep northeastward across lake ontario saturday night and be 
followed by a cold front sweeping eastward across the lake later on 
sunday. behind the cold front, a 30.1 inch ridge will slide eastward 
across the lake through monday, then moves east into new england by 
tuesday.


loz063>065-102100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt thu sep 10 2026

.this afternoon...west winds 15 to 20 knots. waves 3 to 5 feet. 
.tonight...northwest winds 15 to 20 knots becoming north 5 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.friday...northwest winds 10 knots or less becoming west. waves
2 feet or less. 
.friday night...west winds 10 knots or less becoming south. waves
1 foot or less. 
.saturday...south winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers saturday night. waves 1 to 3 feet. 
.sunday...southwest winds 10 to 15 knots becoming northwest 15 to
20 knots. a chance of showers during the day. waves 1 to 3 feet. 
.monday...north winds 5 to 15 knots becoming southeast 15 to
20 knots. waves 1 to 3 feet. 

$$