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


slz022-024-031500-
saint lawrence river from cape vincent to saint regis
403 am edt sat oct 3 2026

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

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am 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 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>065-031500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sat oct 3 2026

.today...northeast winds 5 to 15 knots. waves 1 to 3 feet
subsiding to 1 foot or less. 
.tonight...northeast winds 5 to 15 knots becoming southeast.
waves 2 feet or less. 
.sunday...southeast winds 15 to 20 knots becoming south. 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
5 feet. 
.monday...northwest winds to 30 knots diminishing to 15 to
20 knots. a chance of showers during the day. waves 4 to 7 feet
building to 6 to 9 feet, then subsiding to 4 to 7 feet. waves
occasionally around 11 feet. 
.tuesday...northwest winds 5 to 15 knots becoming southwest.
waves 2 to 4 feet subsiding to 2 feet or less. 
.wednesday...south winds 15 to 20 knots becoming southwest. waves
1 to 3 feet building to 2 to 4 feet. 

$$