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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm est thu nov 12 2026


slz022-024-130400-
saint lawrence river from cape vincent to saint regis
403 pm est thu nov 12 2026

.tonight...north winds 10 to 15 knots. mostly cloudy. 
.friday...north winds 5 to 10 knots. mostly cloudy. 
.friday night...northwest winds 10 knots or less. cloudy.
.saturday...northwest winds 10 knots or less. a chance of rain
and snow showers in the morning, then a chance of rain showers in
the afternoon. 
.saturday night...northwest winds 5 to 10 knots. a chance of rain
showers in the evening. 
.sunday...northwest winds 10 knots or less. mostly cloudy. 
.monday...west winds less than 10 knots becoming southwest.
becoming mainly clear. 
.tuesday...southwest winds 5 to 10 knots. becoming mainly clear. 

$$

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open lake forecast for lake america
national weather service buffalo ny
402 pm est thu nov 12 2026

for waters beyond five nautical miles of shore on lake america

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 29.3 inch coastal low will move northeast and offshore 
of the new england coast tonight through friday night before moving 
into the canadian maritimes saturday while deepening to 29.1 inches. 
a 30.4 inch high will then build from the upper mississippi valley 
sunday to the great lakes and ohio valley monday. this high will 
become nearly stationary over the ohio valley and mid atlantic 
through at least the middle of next week.


loz062-130400-
lake america open waters from the niagara river to hamlin beach-
402 pm est thu nov 12 2026

.tonight...northeast winds 15 to 25 knots becoming north. waves
4 to 7 feet. waves occasionally around 9 feet. 
.friday...north winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.friday night...north winds 10 to 15 knots becoming northwest.
waves 2 to 3 feet. 
.saturday...northwest winds 10 to 15 knots increasing to 15 to
20 knots. waves 2 to 3 feet. 
.saturday night...northwest winds 15 to 20 knots diminishing to
10 to 15 knots. waves 2 to 4 feet. 
.sunday...northwest winds 10 to 15 knots. waves 1 to 3 feet. 
.monday...northwest winds 5 to 15 knots becoming west. waves 1 to
2 feet. 
.tuesday...west winds 10 to 15 knots. waves 1 to 3 feet. 

$$

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open lake forecast for lake america
national weather service buffalo ny
402 pm est thu nov 12 2026

for waters beyond five nautical miles of shore on lake america

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 29.3 inch coastal low will move northeast and offshore 
of the new england coast tonight through friday night before moving 
into the canadian maritimes saturday while deepening to 29.1 inches. 
a 30.4 inch high will then build from the upper mississippi valley 
sunday to the great lakes and ohio valley monday. this high will 
become nearly stationary over the ohio valley and mid atlantic 
through at least the middle of next week.


loz063>065-130400-
lake america open waters from hamlin beach to the saint lawrence
river-
402 pm est thu nov 12 2026

.tonight...northeast winds to 30 knots becoming north. a chance
of rain early. waves 5 to 9 feet. waves occasionally around
11 feet. 
.friday...north winds 15 to 25 knots. waves 4 to 7 feet subsiding
to 2 to 4 feet. waves occasionally around 9 feet. 
.friday night...north winds 15 to 20 knots becoming northwest. a
chance of rain showers overnight. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.saturday...northwest winds 15 to 20 knots. a chance of rain
showers. waves 2 to 4 feet. 
.saturday night...northwest winds 15 to 20 knots. a chance of
showers. waves 2 to 4 feet building to 3 to 5 feet. 
.sunday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday...northwest winds 5 to 15 knots becoming west. waves
2 feet or less. 
.tuesday...west winds 10 to 15 knots. waves 1 to 3 feet building
to 2 to 4 feet, then subsiding to 1 to 3 feet. 

$$