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open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt fri oct 23 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 drift slowly east across new 
england saturday and then settle southward into the mid atlantic 
sunday through monday while weakening to 30.4 inches. a cold front 
will move southeast across the lake monday. another 30.6 inch high 
will then build from northwest ontario province monday night to 
quebec by tuesday night, then off the new england coast by wednesday 
night.


loz063>065-240300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt fri oct 23 2026

.tonight...northeast winds 5 to 15 knots becoming southeast less
than 10 knots. waves 1 to 3 feet subsiding to 1 foot or less. 
.saturday...southeast winds less than 10 knots becoming east.
waves 1 foot or less. 
.saturday night...east winds 10 knots or less becoming south.
waves 2 feet or less. 
.sunday...south winds 5 to 15 knots. waves 2 feet or less. 
.sunday night...south winds 10 knots or less becoming southwest.
waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots becoming northeast and
increasing to 15 to 20 knots. waves 1 to 3 feet building to 2 to
4 feet. 
.tuesday...northeast winds 15 to 20 knots becoming east 5 to
15 knots. waves 2 to 4 feet subsiding to 1 foot or less. 
.wednesday...southeast winds 5 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt fri oct 23 2026


slz022-024-240300-
saint lawrence river from cape vincent to saint regis
403 pm edt fri oct 23 2026

.tonight...northeast winds 5 to 10 knots becoming light and
variable. becoming mainly clear. 
.saturday...light and variable winds. sunny.
.saturday night...light and variable winds. mainly clear. 
.sunday...south winds 10 knots or less becoming southwest. sunny.
.sunday night...southwest winds 5 to 10 knots. partly to mostly
cloudy. 
.monday...southwest winds 10 knots or less becoming north. partly
to mostly cloudy. 
.tuesday...north winds 5 to 10 knots becoming light and variable.
mainly clear, then becoming partly cloudy. 
.wednesday...light and variable winds becoming south 5 to
10 knots. partly to mostly cloudy. 

$$