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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt sat sep 26 2026


slz022-024-270300-
saint lawrence river from cape vincent to saint regis
403 pm edt sat sep 26 2026

.tonight...northeast winds 5 to 15 knots increasing to 15 to
20 knots. mostly cloudy. 
.sunday...northeast winds 15 to 20 knots. a chance of showers in
the afternoon. 
.sunday night...northeast winds 5 to 15 knots. a chance of
showers in the evening. 
.monday...northeast winds 5 to 10 knots. partly to mostly sunny. 
.monday night...northeast winds 10 knots or less. mostly cloudy. 
.tuesday...north winds less than 10 knots. partly to mostly
cloudy. 
.wednesday...south winds 10 knots or less becoming southwest.
mostly cloudy. 
.thursday...southwest winds 5 to 10 knots. a chance of showers
thursday night. 

$$

fzus61 kbuf 262002
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open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sat sep 26 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...an expansive 30.3 inch high will persist across ontario 
and southern quebec through tonight before drifting to eastern 
quebec and labrador sunday. meanwhile, low pressure off the east 
coast will deepen to 29.2 inches today east of the delmarva. this 
low will move to near the jersey shore and long island tonight 
through sunday, then meander northeast along the new england coast 
monday through tuesday while gradually filling to 29.8 inches.


loz063>065-270300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sat sep 26 2026

.tonight...north winds 15 to 25 knots becoming northeast. waves
2 to 4 feet building to 4 to 7 feet. waves occasionally around
9 feet. 
.sunday...northeast winds to 30 knots diminishing to 15 to
25 knots. showers in the afternoon. waves 5 to 9 feet. waves
occasionally around 11 feet. 
.sunday night...northeast winds 15 to 25 knots. showers likely in
the evening. waves 5 to 8 feet subsiding to 3 to 6 feet. waves
occasionally around 10 feet. 
.monday...northeast winds 5 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.monday night...north winds 5 to 15 knots. waves 2 feet or less. 
.tuesday...north winds 10 knots or less becoming south. waves
1 foot or less. 
.wednesday...south winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.thursday...southwest winds 10 to 15 knots becoming west 15 to
20 knots. a chance of showers thursday night. waves 1 to 3 feet. 

$$