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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1010 pm edt tue apr 7 2026


slz022-024-080900-
saint lawrence river from cape vincent to saint regis
1010 pm edt tue apr 7 2026

.overnight...west winds 10 knots or less becoming
southwest. mainly clear. 
.wednesday...southwest winds 10 knots or less. sunny.
.wednesday night...south winds less than 10 knots increasing to
15 to 20 knots. mainly clear. 
.thursday...south winds 15 to 20 knots. a chance of rain showers
in the afternoon. 
.thursday night...south winds 15 to 20 knots becoming southwest
5 to 15 knots. a chance of showers. 
.friday...west winds 10 knots or less becoming northwest. rain
showers likely. 
.saturday...northwest winds less than 10 knots. becoming mainly
clear. 
.sunday...south winds 10 knots or less becoming southwest 10 to
15 knots. a chance of rain showers sunday night. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1009 pm edt tue apr 7 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 29.9 inch clipper low will move off the new england 
coast this evening. a 30.6 inch high will then build over the lower 
great lakes tonight, then east across new england wednesday before 
moving southeast of nova scotia thursday. a 29.5 inch low will then 
move from the north shore of lake superior wednesday night to 
northern quebec by thursday night, with a trailing cold front 
crossing the lake thursday night and friday. a 30.5 inch high is 
then forecast to build into the central great lakes saturday, then 
drift east to new england by sunday.


loz063>065-080900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1009 pm edt tue apr 7 2026

.overnight...northwest winds 5 to 15 knots. waves 3 to
5 feet subsiding to 2 feet or less. 
.wednesday...southwest winds 10 knots or less becoming east 10 to
15 knots. waves 2 feet or less. 
.wednesday night...east winds 10 to 15 knots becoming south and
increasing to 30 knots overnight. waves 1 to 3 feet building to
4 to 7 feet. waves occasionally around 9 feet. 
.thursday...south winds to 30 knots diminishing to 15 to
25 knots. a chance of rain showers in the afternoon. waves 4 to
7 feet subsiding to 3 to 6 feet. waves occasionally around
9 feet. 
.thursday night...south winds 15 to 20 knots becoming west 5 to
15 knots. a chance of rain showers in the evening. waves 3 to
6 feet subsiding to 1 to 3 feet. 
.friday...north winds 5 to 15 knots becoming northwest. rain
showers likely. waves 1 to 3 feet. 
.saturday...northwest winds 5 to 15 knots becoming south less
than 10 knots. waves 2 feet or less. 
.sunday...southeast winds 5 to 10 knots becoming south and
increasing to 15 to 25 knots. a chance of rain showers sunday
night. waves 2 feet or less building to 3 to 6 feet. 

$$