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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am edt fri oct 30 2026


slz022-024-301500-
saint lawrence river from cape vincent to saint regis
402 am edt fri oct 30 2026

.today...west winds 5 to 15 knots. partly sunny. 
.tonight...northwest winds 10 knots or less. mostly cloudy early,
then clearing. 
.saturday...light and variable winds. sunny.
.saturday night...southwest winds less than 10 knots. becoming
mainly clear. 
.sunday...southwest winds 10 knots or less. partly cloudy, then
becoming mostly cloudy. 
.monday...southwest winds 5 to 10 knots becoming light and
variable. mostly cloudy. 
.tuesday...southeast winds 10 knots or less. a chance of showers
tuesday night. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
401 am edt fri oct 30 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 30.4 inch high will settle over the lower great 
lakes tonight. this high will then drift to the eastern seaboard 
tuesday, then east of the mid atlantic coast by wednesday. 
meanwhile, a 29.3 inch low over far northwest ontario province 
tuesday night will move to hudson bay by late wednesday, then to 
northern quebec by thursday while deepening to 29.0 inches. a 
trailing cold front will cross the lower great lakes wednesday 
night, with a 30.0 inch high building east across the eastern 
great lakes region thursday through friday, before sliding east 
into new england by saturday.


loz062-301500-
lake ontario open waters from the niagara river to hamlin beach-
401 am edt fri oct 30 2026

.today...northwest winds 15 to 20 knots. waves 3 to 5 feet. 
.tonight...northwest winds 15 to 20 knots becoming north 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.saturday...northwest winds less than 10 knots becoming west.
waves 1 foot or less. 
.saturday night...southwest winds less than 10 knots becoming
south. waves 1 foot or less. 
.sunday...south winds 10 knots or less becoming southwest. waves
1 foot or less. 
.monday...southwest winds 10 knots or less becoming south. waves
1 foot or less. 
.tuesday...southeast winds 5 to 10 knots becoming south. a chance
of showers during the day. waves 2 feet or less. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
401 am edt fri oct 30 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 30.4 inch high will settle over the lower great 
lakes tonight. this high will then drift to the eastern seaboard 
tuesday, then east of the mid atlantic coast by wednesday. 
meanwhile, a 29.3 inch low over far northwest ontario province 
tuesday night will move to hudson bay by late wednesday, then to 
northern quebec by thursday while deepening to 29.0 inches. a 
trailing cold front will cross the lower great lakes wednesday 
night, with a 30.0 inch high building east across the eastern 
great lakes region thursday through friday, before sliding east 
into new england by saturday.


loz063>065-301500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
401 am edt fri oct 30 2026

.today...northwest winds 15 to 20 knots. waves 3 to 6 feet. 
.tonight...northwest winds 15 to 20 knots becoming north 10 to
15 knots. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.saturday...north winds 10 knots or less becoming west. waves
2 feet or less. 
.saturday night...west winds 5 to 10 knots becoming south. waves
1 foot or less. 
.sunday...south winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.monday...southwest winds 10 knots or less becoming south. waves
2 feet or less. 
.tuesday...southeast winds 5 to 15 knots becoming south 15 to
20 knots. a chance of showers tuesday night. waves 1 to 3 feet. 

$$