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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1012 pm edt fri apr 10 2026


slz022-024-110900-
saint lawrence river from cape vincent to saint regis
1012 pm edt fri apr 10 2026

.overnight...northwest winds less than 10 knots. mostly
cloudy. 
.saturday...northwest winds 10 knots or less. mostly sunny. 
.saturday night...west winds 5 to 10 knots becoming light and
variable. mainly clear. 
.sunday...south winds 10 knots or less. rain showers likely in
the afternoon. 
.sunday night...south winds 5 to 15 knots becoming southwest
15 to 20 knots. showers.
.monday...southwest winds 15 to 20 knots becoming northwest 5 to
15 knots. showers during the day, then a chance of showers monday
night. 
.tuesday...northeast winds 5 to 10 knots becoming south. a chance
of showers during the day, then showers likely tuesday night. 
.wednesday...south winds 5 to 10 knots becoming southwest.
showers likely. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1010 pm edt fri apr 10 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 30.0 inch surface low over new england this evening 
will carry a cold front farther east of the lake, and off the new 
england coastline tomorrow. a 30.5 inch high will then build over 
the great lakes saturday, and then drift east to new england by 
sunday. a 29.4 inch low will then move from near lake superior 
sunday night to northern quebec monday, with a trailing cold front 
stalling near the lake monday through tuesday. a 29.6 inch surface 
low advancing through the central great lakes wednesday will lift 
this frontal boundary northward, into canada, with a trailing cold 
front from the surface low crossing the lake wednesday evening.


loz063>065-110900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1010 pm edt fri apr 10 2026

.rest of tonight...northwest winds 10 to 15 knots. a chance of
rain showers late this evening. waves 1 to 3 feet. 
.saturday...northwest winds 10 to 15 knots becoming west. waves
1 to 3 feet. 
.saturday night...west winds 5 to 15 knots becoming south less
than 10 knots. waves 1 to 3 feet subsiding to 1 foot or less. 
.sunday...southeast winds 5 to 15 knots. a chance of rain showers
in the morning, then rain showers likely in the afternoon. waves
2 feet or less. 
.sunday night...southeast winds 15 to 25 knots becoming south.
showers likely. waves 2 to 4 feet building to 3 to 6 feet. 
.monday...southwest winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. showers likely during the day,
then a chance of showers monday night. waves 3 to 6 feet building
to 4 to 7 feet, then subsiding to 2 to 4 feet. waves occasionally
around 9 feet. 
.tuesday...east winds 10 to 15 knots becoming south 15 to
20 knots. a chance of showers during the day, then showers likely
with a chance of thunderstorms tuesday night. waves 1 to 3 feet. 
.wednesday...south winds 15 to 20 knots becoming southwest.
showers likely. waves 2 to 4 feet building to 3 to 5 feet. 

winds and waves higher in and near thunderstorms.

$$