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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
424 am edt wed sep 2 2026


slz022-024-021530-
saint lawrence river from cape vincent to saint regis
424 am edt wed sep 2 2026

.today...southeast winds 10 knots or less becoming south. showers
likely with a chance of thunderstorms this afternoon. 
.tonight...south winds 5 to 10 knots becoming southwest. showers
with a chance of thunderstorms through the early overnight, then
a chance of showers late. 
.thursday...southwest winds 10 knots or less becoming west. a
chance of showers in the afternoon. 
.thursday night...west winds less than 10 knots. a chance of
showers in the evening. 
.friday...northwest winds 10 knots or less. partly cloudy. 
.saturday...north winds 10 knots or less becoming northeast.
becoming mainly clear. 
.sunday...northeast winds less than 10 knots. mainly clear. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
407 am edt wed sep 2 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 low averaging 30.0 inches and a frontal boundary will 
move northeast across the lake as a warm front late this morning. 
the front will then settle back south across the lake thursday. a 
30.1 inch high over northwest ontario province friday will settle 
south into the lower great lakes saturday through sunday.


loz062-021515-
lake ontario open waters from the niagara river to hamlin beach-
407 am edt wed sep 2 2026

.today...southeast winds 10 knots or less becoming south. a
chance of showers and thunderstorms early, then a chance of
showers late this morning. a chance of showers and thunderstorms
late. waves 1 foot or less. 
.tonight...southwest winds 5 to 10 knots becoming west. showers
with a chance of thunderstorms through the early overnight, then
a chance of showers late. waves 1 foot or less. 
.thursday...west winds 5 to 10 knots. waves 1 foot or less. 
.thursday night...west winds 5 to 10 knots becoming northwest.
waves 1 foot or less. 
.friday...northwest winds 10 knots or less becoming north. waves
1 foot or less. 
.saturday...north winds 10 knots or less becoming northeast.
waves 1 foot or less. 
.sunday...northeast winds 10 knots or less becoming southeast.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

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glflo 
expires:202609021515;;765025

open lake forecast for lake ontario
national weather service buffalo ny
407 am edt wed sep 2 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 low averaging 30.0 inches and a frontal boundary will 
move northeast across the lake as a warm front late this morning. 
the front will then settle back south across the lake thursday. a 
30.1 inch high over northwest ontario province friday will settle 
south into the lower great lakes saturday through sunday.


loz063>065-021515-
lake ontario open waters from hamlin beach to the saint lawrence
river-
407 am edt wed sep 2 2026

.today...southeast winds 5 to 15 knots becoming south. showers
likely this morning, then showers likely with a chance of
thunderstorms this afternoon. waves 2 feet or less. 
.tonight...south winds 10 to 15 knots becoming west. showers with
a chance of thunderstorms early, then showers with thunderstorms
likely. a chance of showers late. waves 2 feet or less. 
.thursday...west winds 5 to 10 knots. a chance of showers in the
morning. waves 1 to 2 feet. 
.thursday night...west winds 5 to 10 knots becoming northwest.
waves 1 to 2 feet. 
.friday...northwest 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 becoming southeast.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$