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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
issued by national weather service cleveland oh
1001 pm edt mon sep 14 2026


slz022-024-150915-
saint lawrence river from cape vincent to saint regis
1006 pm edt mon sep 14 2026

.overnight...light and variable winds. clear, then becoming
partly cloudy. 
.tuesday...southeast winds 5 to 10 knots becoming south. mostly
sunny early, then becoming mostly cloudy. 
.tuesday night...south winds 10 to 15 knots becoming southwest. a
chance of showers. 
.wednesday...southwest winds 10 knots or less becoming west.
partly sunny. 
.wednesday night...light and variable winds. mostly cloudy. 
.thursday...northeast winds less than 10 knots becoming
northwest. a chance of showers. 
.friday...north winds less than 10 knots becoming east. partly
cloudy. 
.saturday...southeast winds 10 knots or less becoming northeast.
a chance of showers. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
issued by national weather service cleveland oh
1000 pm edt mon sep 14 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. the high will drift to the eastern seaboard 
tuesday then off the mid atlantic coast by wednesday. meanwhile, 
a 29.4 inch low over far northwest ontario province tuesday night
will move to hudson bay by late wednesday, then to northern 
quebec by thursday. 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.


loz062-150915-
lake ontario open waters from the niagara river to hamlin beach-
1000 pm edt mon sep 14 2026

.overnight...southeast winds 10 knots or less becoming
south 10 to 15 knots. waves 1 foot or less. 
.tuesday...south winds 5 to 15 knots. waves 2 feet or less. 
.tuesday night...south winds 5 to 10 knots becoming southwest. a
chance of showers. waves 2 feet or less. 
.wednesday...west winds 5 to 10 knots becoming light and
variable. a chance of showers in the morning. waves 1 foot or
less. 
.wednesday night...northwest winds 10 knots or less becoming
northeast. a chance of showers overnight. waves 1 foot or less. 
.thursday...northeast winds 5 to 10 knots becoming north. showers
likely during the day, then a chance of showers thursday night.
waves 1 foot or less. 
.friday...northeast winds 5 to 10 knots becoming east. waves
1 foot or less. 
.saturday...east winds 10 to 15 knots becoming northeast 15 to
20 knots. a chance of showers. waves 1 to 3 feet building to 2 to
4 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
issued by national weather service cleveland oh
1000 pm edt mon sep 14 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. the high will drift to the eastern seaboard 
tuesday then off the mid atlantic coast by wednesday. meanwhile, 
a 29.4 inch low over far northwest ontario province tuesday night
will move to hudson bay by late wednesday, then to northern 
quebec by thursday. 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>065-150915-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1000 pm edt mon sep 14 2026

.overnight...northwest winds 5 to 10 knots becoming south.
waves 1 foot or less. 
.tuesday...south winds 15 to 20 knots. waves 1 to 3 feet building
to 2 to 4 feet. 
.tuesday night...south winds 15 to 25 knots. a chance of showers.
waves 2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to
4 feet. 
.wednesday...southwest winds 15 to 20 knots diminishing to
10 knots or less. a chance of showers. waves 1 to 3 feet
subsiding to 1 foot or less. 
.wednesday night...west winds 10 knots or less becoming east. a
chance of showers overnight. waves 1 foot or less. 
.thursday...east winds 5 to 10 knots becoming north. showers
likely during the day, then a chance of showers thursday night.
waves 2 feet or less. 
.friday...north winds 5 to 10 knots becoming east. waves 2 feet
or less. 
.saturday...southeast winds 5 to 15 knots becoming northeast
15 to 20 knots. a chance of showers. waves 2 feet or less
building to 2 to 4 feet. 

$$