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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt wed sep 17 2025

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 30.3 inch high across quebec will drift east off the 
new england coast by tonight, while remaining ridged over the lake. 
a cold front will cross the lake thursday night, with another area 
of high pressure over western ontario builds southeast across the 
lower great lakes friday and saturday.


loz062-172100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt wed sep 17 2025

.this afternoon...east winds 5 to 10 knots becoming northeast.
waves 1 foot or less. 
.tonight...east winds less than 10 knots. waves 1 foot or less. 
.thursday...southwest winds 10 knots or less becoming west. waves
1 foot or less. 
.thursday night...west winds 5 to 15 knots becoming north. waves
2 feet or less building to 2 to 3 feet. 
.friday...north winds 5 to 15 knots becoming east 15 to 20 knots.
waves 1 to 3 feet. 
.saturday...east winds 10 to 15 knots becoming southeast. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.sunday...southeast winds 10 to 15 knots becoming south. waves
1 to 2 feet. 

$$

fzus61 kbuf 171402
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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt wed sep 17 2025

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 30.3 inch high across quebec will drift east off the 
new england coast by tonight, while remaining ridged over the lake. 
a cold front will cross the lake thursday night, with another area 
of high pressure over western ontario builds southeast across the 
lower great lakes friday and saturday.


loz063>065-172100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt wed sep 17 2025

.this afternoon...south winds 5 to 15 knots becoming northeast.
waves 2 feet or less. 
.tonight...east winds 10 knots or less becoming southwest. waves
1 foot or less. 
.thursday...southwest winds 5 to 15 knots becoming west. waves
2 feet or less. 
.thursday night...west winds 10 to 15 knots becoming north 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.friday...north winds 15 to 20 knots becoming northeast. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.saturday...east winds 10 to 15 knots becoming southeast 15 to
20 knots. waves 1 to 3 feet. 
.sunday...south winds 15 to 20 knots. waves 2 to 4 feet building
to 3 to 5 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am edt wed sep 17 2025


slz022-024-172100-
saint lawrence river from cape vincent to saint regis
1002 am edt wed sep 17 2025

.this afternoon...southwest winds 10 knots or less. partly sunny. 
.tonight...southwest winds less than 10 knots. partly to mostly
cloudy. 
.thursday...southwest winds 10 knots or less becoming west.
mostly sunny. 
.thursday night...west winds 10 knots or less becoming north.
mostly cloudy. 
.friday...north winds 10 knots or less. mainly clear. 
.saturday...northeast winds 10 knots or less becoming southeast.
mainly clear. 
.sunday...south winds 5 to 15 knots. partly cloudy. 

$$