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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt sat may 2 2026


slz022-024-030900-
saint lawrence river from cape vincent to saint regis
1003 pm edt sat may 2 2026

.overnight...southwest winds less than 10 knots becoming
west. partly to mostly cloudy. 
.sunday...west winds 10 knots or less becoming southwest 10 to
15 knots. mostly sunny. 
.sunday night...southwest winds 5 to 15 knots. a chance of
showers in the evening, then showers likely overnight. 
.monday...southwest winds 10 to 15 knots increasing to 15 to
20 knots. showers likely in the morning. 
.monday night...southwest winds 5 to 15 knots becoming south.
partly to mostly cloudy. 
.tuesday...southwest winds 5 to 15 knots becoming west less than
10 knots. showers likely. 
.wednesday...west winds 10 knots or less becoming southwest.
showers likely during the day, then a chance of showers wednesday
night. 
.thursday...northeast winds 10 knots or less becoming west 10 to
15 knots. showers likely. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt sat may 2 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 29.7 inch low across quebec will retrograde 
northwestward to james bay today. at the same time another 29.7 inch 
low will deepen to 29.2 inches as it tracks from the southeastern 
states to atlantic canada through sunday, while a 30.2 inch high 
ridges across the lower great lakes, then western new england. a 
29.1 inch low over western ontario province monday will then weaken 
to 29.3 inches as it moves to northern quebec through tuesday, with 
its trailing cold front slowly crossing the lake tuesday. the cold 
front will stall just east of the lake on wednesday into thursday 
with a couple waves of low pressure track north along the front near 
or just east of the lake.


loz063>065-030900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt sat may 2 2026

.overnight...west winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday...west winds 10 to 15 knots becoming southwest 15 to
20 knots. waves 1 to 3 feet. 
.sunday night...southwest winds 15 to 20 knots. a chance of
showers overnight. waves 1 to 3 feet building to 3 to 6 feet. 
.monday...southwest winds 15 to 20 knots becoming south 10 to
15 knots. a chance of showers in the morning. waves 3 to 6 feet
subsiding to 1 to 3 feet. 
.monday night...south winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet building to 3 to 5 feet. 
.tuesday...southwest winds 15 to 20 knots becoming west 5 to
15 knots. showers likely with a chance of thunderstorms during
the day, then showers likely tuesday night. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.wednesday...west winds 5 to 10 knots becoming northwest. showers
likely during the day, then a chance of showers wednesday night.
waves 2 feet or less. 
.thursday...north winds 5 to 15 knots becoming west and
increasing to 15 to 25 knots. showers likely. waves 2 feet or
less building to 4 to 7 feet. waves occasionally around 9 feet. 

winds and waves higher in and near thunderstorms.

$$