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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt tue oct 20 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 30.4 inch high over quebec tonight will drift east 
across the canadian maritimes wednesday. a weak cold front will then 
move south across the lake thursday. a 30.3 inch high will then 
build from the upper great lakes thursday to the lower great lakes 
friday, then settle over new england saturday through sunday while 
strengthening to 30.6 inches.


loz062-210900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt tue oct 20 2026

.overnight...northeast winds 10 to 15 knots becoming east.
waves 1 to 3 feet. 
.wednesday...east winds 10 knots or less becoming northeast.
waves 1 to 2 feet. 
.wednesday night...light and variable winds becoming northwest
5 to 10 knots. waves 1 foot or less. 
.thursday...northwest winds 5 to 10 knots becoming north. waves
1 foot or less. 
.thursday night...north winds 10 to 15 knots becoming northeast.
waves 1 to 3 feet. 
.friday...northeast winds 10 knots or less becoming southeast.
waves 1 to 3 feet subsiding to 1 foot or less. 
.saturday...southeast winds 10 knots or less becoming south.
waves 1 foot or less. 
.sunday...southwest winds 5 to 15 knots. waves 2 feet or less. 

$$

fzus61 kbuf 210203
glflo 
expires:202610210900;;914374

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt tue oct 20 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 30.4 inch high over quebec tonight will drift east 
across the canadian maritimes wednesday. a weak cold front will then 
move south across the lake thursday. a 30.3 inch high will then 
build from the upper great lakes thursday to the lower great lakes 
friday, then settle over new england saturday through sunday while 
strengthening to 30.6 inches.


loz063>065-210900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt tue oct 20 2026

.overnight...northeast winds 10 to 15 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.wednesday...east winds 5 to 10 knots becoming north. waves
2 feet or less. 
.wednesday night...north winds 10 knots or less becoming
northwest. waves 1 foot or less. 
.thursday...north winds 5 to 15 knots. waves 1 to 3 feet. 
.thursday night...north winds 15 to 20 knots becoming northeast.
waves 2 to 4 feet. 
.friday...northeast winds 5 to 15 knots becoming southeast less
than 10 knots. waves 2 to 4 feet subsiding to 2 feet or less. 
.saturday...south winds 10 knots or less increasing to 10 to
15 knots. waves 2 feet or less. 
.sunday...south winds 5 to 15 knots becoming southwest. waves
2 feet or less. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt tue oct 20 2026


slz022-024-210900-
saint lawrence river from cape vincent to saint regis
1003 pm edt tue oct 20 2026

.overnight...northeast winds less than 10 knots. clear.
.wednesday...northeast winds less than 10 knots. sunny.
.wednesday night...light and variable winds. clear in the
evening, then becoming partly cloudy. 
.thursday...light and variable winds becoming north 5 to
10 knots. mostly sunny. 
.thursday night...north winds 5 to 10 knots. mainly clear. 
.friday...north winds less than 10 knots. mainly clear. 
.saturday...light and variable winds. mainly clear. 
.sunday...south winds 5 to 10 knots becoming southwest. partly
cloudy, then becoming mostly cloudy. 

$$