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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt fri oct 2 2026


slz022-024-030900-
saint lawrence river from cape vincent to saint regis
1003 pm edt fri oct 2 2026

.rest of tonight...northwest winds 10 knots or less becoming
north. partly cloudy late this evening, then becoming mainly
clear. 
.saturday...north winds less than 10 knots. sunny.
.saturday night...light and variable winds. mainly clear. 
.sunday...southeast winds 10 knots or less becoming south 5 to
15 knots. mostly sunny in the morning, then becoming partly
sunny. 
.sunday night...south winds 5 to 15 knots becoming west. a chance
of showers. 
.monday...west winds 5 to 15 knots. a chance of rain showers
during the day. 
.tuesday...west winds 10 knots or less becoming southwest. mainly
clear. 
.wednesday...south winds 5 to 15 knots becoming southwest. mainly
clear, then becoming mostly cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt fri oct 2 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 build east across the lower great 
lakes region through saturday, before sliding northeast into 
northern new england saturday night. a 29.7 inch low over 
northwestern ontario sunday will deepen to 29.4 inches as it slides 
just south of james bay into 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 region 
monday into tuesday, before sliding into the northeast wednesday.


loz062-030900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt fri oct 2 2026

.overnight...northwest winds 15 to 20 knots becoming north
10 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.saturday...northeast winds 10 knots or less becoming east. waves
2 feet or less. 
.saturday night...east winds 5 to 15 knots becoming southeast.
waves 2 feet or less. 
.sunday...southeast winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.sunday night...southwest winds 10 to 15 knots becoming northwest
15 to 20 knots. waves 1 to 3 feet building to 3 to 5 feet. 
.monday...northwest winds 15 to 25 knots. waves 3 to 6 feet
subsiding to 2 to 4 feet. 
.tuesday...northwest winds 5 to 10 knots becoming southwest.
waves 2 feet or less. 
.wednesday...southwest winds 10 to 15 knots. waves 1 to 3 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt fri oct 2 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 build east across the lower great 
lakes region through saturday, before sliding northeast into 
northern new england saturday night. a 29.7 inch low over 
northwestern ontario sunday will deepen to 29.4 inches as it slides 
just south of james bay into 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 region 
monday into tuesday, before sliding into the northeast wednesday.


loz063>065-030900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt fri oct 2 2026

.overnight...northwest winds 15 to 20 knots becoming
northeast. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.saturday...northeast winds 5 to 15 knots diminishing to less
than 10 knots. waves 1 to 3 feet subsiding to 1 foot or less. 
.saturday night...northeast winds 5 to 15 knots becoming
southeast. waves 2 feet or less. 
.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 15 to 20 knots becoming west. a
chance of showers overnight. waves 1 to 3 feet building to 3 to
6 feet. 
.monday...northwest winds to 30 knots diminishing to 15 to
20 knots. waves 5 to 8 feet subsiding to 3 to 6 feet. waves
occasionally around 10 feet. 
.tuesday...northwest winds 15 to 20 knots becoming southwest and
diminishing to 5 to 10 knots. waves 2 to 4 feet subsiding to 1 to
2 feet. 
.wednesday...southwest winds 15 to 20 knots. waves 1 to 3 feet
building to 2 to 4 feet. 

$$