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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt fri oct 9 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 weakens 
briefly over the lake this afternoon as a very weak trough averaging 
30.0 inches slides southeastward across the region. the ridge exits 
slowly eastward tonight through sunday before a weak trough 
averaging 29.8 inches slides eastward across the lake sunday night. 
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 30.0 inches 
builds from northern ontario and vicinity through this wednesday.


loz063>065-092100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt fri oct 9 2026

.this afternoon...west winds 15 to 20 knots. a chance of
waterspouts. a chance of showers. waves 3 to 6 feet. 
.tonight...northwest winds 15 to 20 knots becoming east and
diminishing to 5 to 10 knots. waves 3 to 6 feet subsiding to 1 to
3 feet. 
.saturday...east winds 5 to 15 knots. waves 2 feet or less. 
.saturday night...east winds 10 to 15 knots becoming southeast
15 to 20 knots. waves 1 to 3 feet. 
.sunday...southeast winds 15 to 20 knots diminishing to 5 to
15 knots. showers. waves 1 to 3 feet. 
.monday...northeast winds 10 knots or less becoming southwest and
increasing to 15 to 20 knots. a chance of showers monday night.
waves 1 foot or less building to 1 to 3 feet. 
.tuesday...west winds 15 to 20 knots becoming northwest. a chance
of showers. waves 2 to 4 feet building to 3 to 5 feet, then
subsiding to 2 to 4 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt fri oct 9 2026


slz022-024-092100-
saint lawrence river from cape vincent to saint regis
1003 am edt fri oct 9 2026

.this afternoon...west winds 5 to 15 knots. a chance of showers
this afternoon. 
.tonight...northwest winds 5 to 10 knots becoming light and
variable. becoming mainly clear. 
.saturday...light and variable winds. sunny.
.saturday night...east winds 10 knots or less becoming south.
mainly clear in the evening, then becoming mostly cloudy. 
.sunday...south winds 10 knots or less. a chance of showers
during the day, then showers likely sunday night. 
.monday...light and variable winds becoming southwest 5 to
10 knots. showers likely monday night. 
.tuesday...southwest winds 5 to 10 knots becoming northwest.
showers likely. 

$$