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open lake forecast for lake ontario
national weather service buffalo ny
655 pm edt wed apr 8 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 30.6 inch high will move off the coast of new england 
tonight and southeast of nova scotia thursday. a 29.5 inch low will 
move from the north shore of lake superior tonight to northern 
quebec by thursday night, with a trailing cold front crossing the 
lake thursday night and friday. a 30.5 inch high is then forecast to 
build into the central great lakes saturday, then drift east to new 
england by sunday. the cold front from a 29.4 inch low near james 
bay will track across the lake monday into tuesday.


loz062-090300-
lake ontario open waters from the niagara river to hamlin beach-
655 pm edt wed apr 8 2026

.tonight...east winds 15 to 20 knots becoming south. waves 2 to
4 feet. 
.thursday...south winds 15 to 25 knots becoming southwest. a
chance of showers late. waves 2 to 4 feet building to 3 to
6 feet. 
.thursday night...southwest winds 15 to 20 knots becoming
northwest 5 to 15 knots. a chance of rain showers. waves 3 to
6 feet subsiding to 1 to 3 feet. 
.friday...north winds less than 10 knots. rain showers. waves
1 foot or less. 
.friday night...northwest winds 10 knots or less. rain showers
likely in the evening. waves 1 foot or less. 
.saturday...northwest winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.sunday...east winds 5 to 15 knots becoming southwest 15 to
20 knots. a chance of rain showers sunday night. waves 2 feet or
less building to 2 to 4 feet. 
.monday...southwest winds 15 to 25 knots increasing to 30 knots.
a chance of showers. waves 3 to 6 feet building to 4 to 7 feet.
waves occasionally around 9 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
655 pm edt wed apr 8 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 30.6 inch high will move off the coast of new england 
tonight and southeast of nova scotia thursday. a 29.5 inch low will 
move from the north shore of lake superior tonight to northern 
quebec by thursday night, with a trailing cold front crossing the 
lake thursday night and friday. a 30.5 inch high is then forecast to 
build into the central great lakes saturday, then drift east to new 
england by sunday. the cold front from a 29.4 inch low near james 
bay will track across the lake monday into tuesday.


loz063>065-090300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
655 pm edt wed apr 8 2026

.tonight...east winds 15 to 25 knots becoming south. waves 1 to
3 feet building to 3 to 5 feet. 
.thursday...south winds 15 to 25 knots. a chance of rain showers
late. waves 3 to 6 feet. 
.thursday night...south winds 15 to 25 knots becoming southwest
and diminishing to 5 to 10 knots overnight. a chance of rain
showers in the evening. waves 3 to 6 feet subsiding to 1 to
3 feet. 
.friday...west winds 10 knots or less becoming north. rain
showers. waves 2 feet or less. 
.friday night...northwest winds 10 knots or less. rain showers in
the evening, then a chance of rain showers overnight. waves
2 feet or less. 
.saturday...northwest winds 10 knots or less becoming south.
waves 2 feet or less. 
.sunday...southeast winds 5 to 10 knots becoming south and
increasing to 15 to 25 knots. a chance of rain showers sunday
night. waves 1 foot or less building to 3 to 6 feet. 
.monday...south winds 15 to 25 knots becoming southwest. a chance
of showers. waves 3 to 6 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
410 pm edt wed apr 8 2026


slz022-024-090300-
saint lawrence river from cape vincent to saint regis
410 pm edt wed apr 8 2026

.tonight...southwest winds 5 to 15 knots becoming south. mainly
clear. 
.thursday...south winds 15 to 20 knots. a chance of rain showers
late. 
.thursday night...south winds 15 to 20 knots becoming southwest
5 to 15 knots. a chance of showers. 
.friday...southwest winds less than 10 knots becoming northwest.
rain showers. 
.friday night...northwest winds less than 10 knots. rain showers
in the evening. 
.saturday...northwest winds 5 to 10 knots becoming light and
variable. becoming mainly clear. 
.sunday...south winds 10 knots or less increasing to 10 to
15 knots. rain showers likely sunday night. 
.monday...southwest winds 10 to 15 knots. showers likely. 

$$