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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt sun oct 11 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 high pressure ridge averaging 30.1 inches 
continues to slowly exit eastward and briefly replaced by a weak 
trough averaging 29.8 inches. behind the trough, a weak ridge 
averaging 29.9 inches slides eastward across the lake on monday, 
exits eastward monday night, and is followed by a cold front 
sweeping southeastward across the lake on tuesday. behind the cold 
front, a ridge averaging 30.2 inches builds from northern ontario 
through thursday.


loz063>065-112100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt sun oct 11 2026

.this afternoon...southeast winds 15 to 20 knots diminishing to
10 to 15 knots. a chance of rain early. rain
likely late. waves 1 to 3 feet. 
.tonight...southeast winds 10 knots or less. rain in the evening,
then a chance of rain after midnight. waves 2 feet or less. 
.monday...northwest winds 10 knots or less becoming west. waves
1 foot or less. 
.monday night...southwest winds 5 to 15 knots becoming south. a
chance of showers overnight. waves 2 feet or less. 
.tuesday...south winds 15 to 20 knots becoming northwest. showers
with a chance of thunderstorms. waves 1 to 3 feet building to
2 to 4 feet. 
.wednesday...northwest winds 5 to 15 knots becoming north 15 to
20 knots. waves 1 to 3 feet. 
.thursday...north winds 10 to 15 knots becoming southeast 15 to
20 knots. a chance of showers thursday night. waves 1 to 3 feet
building to 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt sun oct 11 2026


slz022-024-112100-
saint lawrence river from cape vincent to saint regis
1003 am edt sun oct 11 2026

.this afternoon...south winds 5 to 10 knots. mostly cloudy. 
.tonight...south winds less than 10 knots. a chance of rain
through the early overnight. 
.monday...light and variable winds. a chance of showers in the
afternoon. 
.monday night...northwest winds 10 knots or less becoming east.
showers.
.tuesday...southeast winds 5 to 10 knots becoming northwest.
showers.
.wednesday...northwest winds 10 knots or less. mostly cloudy. 
.thursday...northwest winds 10 knots or less becoming east. a
chance of rain showers thursday night. 

$$