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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt sat oct 3 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 30.3 inch high will slide northeast across northern 
new england tonight. a 29.7 inch low over northwest ontario sunday 
will deepen to 29.4 inches as it slides just south of james bay over 
central quebec sunday night, while sending a pair of cold fronts 
across the lake. a 30.2 inch high over the upper midwest will then 
build across the great lakes monday into tuesday, before sliding 
into the northeast wednesday. a cold front will then pass across the 
lake thursday.


loz063>065-040900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt sat oct 3 2026

.overnight...east winds 10 to 15 knots becoming southeast
15 to 20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.sunday...southeast winds 15 to 20 knots becoming south 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.sunday night...south winds 10 to 15 knots becoming west 15 to
20 knots. a chance of showers. waves 1 to 3 feet building to 3 to
6 feet. 
.monday...northwest winds to 30 knots. waves 5 to 8 feet. waves
occasionally around 10 feet. 
.monday night...northwest winds 15 to 25 knots. waves 5 to 8 feet
subsiding to 2 to 4 feet. waves occasionally around 10 feet. 
.tuesday...northwest winds 5 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet. 
.wednesday...south winds 15 to 20 knots becoming southwest. a
chance of showers wednesday night. waves 3 to 5 feet subsiding to
2 to 4 feet. 
.thursday...west winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt sat oct 3 2026


slz022-024-040900-
saint lawrence river from cape vincent to saint regis
1003 pm edt sat oct 3 2026

.overnight...east winds 10 knots or less. mainly clear. 
.sunday...southeast winds 10 knots or less becoming south. mostly
sunny early, then becoming mostly cloudy. 
.sunday night...south winds 5 to 15 knots becoming west. a chance
of showers in the evening, then showers likely overnight. 
.monday...west winds 5 to 15 knots becoming northwest. a chance
of showers in the morning. 
.monday night...northwest winds 5 to 15 knots becoming west.
becoming mainly clear. 
.tuesday...west winds 10 knots or less becoming south. mainly
clear. 
.wednesday...south winds 5 to 15 knots becoming southwest. a
chance of rain showers wednesday night. 
.thursday...southwest winds 5 to 10 knots. partly cloudy. 

$$