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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm edt wed sep 9 2026


slz022-024-100900-
saint lawrence river from cape vincent to saint regis
1002 pm edt wed sep 9 2026

.rest of tonight...southwest winds 15 to 20 knots diminishing to
10 to 15 knots. showers likely late this evening, then a chance
of showers after midnight. 
.thursday...west winds 10 to 15 knots. mostly sunny. 
.thursday night...northwest winds 5 to 10 knots becoming light
and variable. partly cloudy in the evening, then becoming mainly
clear. 
.friday...light and variable winds becoming west 5 to 10 knots.
sunny.
.friday night...southwest winds less than 10 knots becoming
south. clear.
.saturday...south winds 5 to 15 knots. mainly clear, then
becoming partly cloudy. 
.sunday...southwest winds 10 knots or less becoming west. a
chance of showers. 
.monday...northwest winds 10 knots or less becoming southeast.
partly to mostly cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1001 pm edt wed sep 9 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 cold front sweeps eastward across lake ontario late 
this evening through early thursday morning. behind the front, a 
high pressure ridge averaging 30.0 inches builds from the western 
great lakes through friday and then exits toward new england on 
saturday. a warm front should 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 should slide eastward across the lake through monday.


loz062-100900-
lake ontario open waters from the niagara river to hamlin beach-
1001 pm edt wed sep 9 2026

.overnight...southwest winds 15 to 20 knots becoming west.
waves 3 to 5 feet subsiding to 2 to 4 feet. 
.thursday...west winds 10 to 15 knots. waves 2 to 4 feet. 
.thursday night...northwest winds 15 to 20 knots diminishing to
10 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northwest winds 10 knots or less becoming southwest.
waves 2 feet 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 5 to 15 knots becoming northwest. waves
1 foot or less. 
.monday...north winds 5 to 15 knots becoming south. waves 1 to
3 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1001 pm edt wed sep 9 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 cold front sweeps eastward across lake ontario late 
this evening through early thursday morning. behind the front, a 
high pressure ridge averaging 30.0 inches builds from the western 
great lakes through friday and then exits toward new england on 
saturday. a warm front should 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 should slide eastward across the lake through monday.


loz063>065-100900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1001 pm edt wed sep 9 2026

.overnight...southwest winds 15 to 20 knots becoming west.
a chance of showers. waves 3 to 5 feet. 
.thursday...west winds 15 to 20 knots. waves 3 to 6 feet. 
.thursday night...northwest winds 15 to 20 knots diminishing to
5 to 15 knots. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.friday...northwest winds 10 knots or less becoming west. waves
2 feet or less. 
.friday night...west winds 5 to 10 knots becoming south. waves
1 foot or less. 
.saturday...south winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet. 
.sunday...southwest winds 10 to 15 knots becoming northwest.
waves 1 to 3 feet. 
.monday...north winds 5 to 10 knots becoming south and increasing
to 15 to 20 knots. waves 1 to 3 feet. 

$$