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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt thu oct 29 2026


slz022-024-300900-
saint lawrence river from cape vincent to saint regis
1003 pm edt thu oct 29 2026

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

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu oct 29 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.


loz062-300900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt thu oct 29 2026

.rest of tonight...west winds around 10 knots becoming northwest
and increasing to 15 to 20 knots. a chance of showers late this
evening. waves 2 to 4 feet building to 3 to 5 feet. 
.friday...northwest winds 15 to 20 knots. waves 3 to 5 feet. 
.friday night...northwest winds 15 to 20 knots becoming north
5 to 15 knots. waves 2 to 4 feet subsiding to 1 to 2 feet. 
.saturday...north winds less than 10 knots becoming west. waves
1 foot or less. 
.saturday night...southwest winds less than 10 knots. waves
1 foot or less. 
.sunday...southeast 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...east winds 5 to 15 knots becoming southeast. a chance
of showers. waves 2 feet or less. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu oct 29 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>065-300900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt thu oct 29 2026

.rest of tonight...west winds 10 to 15 knots becoming northwest
15 to 20 knots. a chance of showers late this evening. waves 3 to
5 feet building to 3 to 6 feet. 
.friday...northwest winds 15 to 20 knots becoming west. waves
3 to 6 feet building to 4 to 7 feet. waves occasionally around
9 feet. 
.friday night...northwest winds 15 to 25 knots becoming north and
diminishing to 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 10 knots or less 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. a chance of showers.
waves 1 to 3 feet. 

$$