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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt sun sep 27 2026


slz022-024-271500-
saint lawrence river from cape vincent to saint regis
403 am edt sun sep 27 2026

.today...northeast winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers early this afternoon. showers
likely late. 
.tonight...northeast winds 5 to 15 knots. showers likely early,
then a chance of showers late in the evening. 
.monday...northeast winds 5 to 10 knots. a chance of showers in
the afternoon. 
.monday night...northeast winds 10 knots or less. a chance of
showers in the evening. 
.tuesday...north winds less than 10 knots. mostly cloudy, then
clearing. 
.wednesday...south winds 10 knots or less. mostly cloudy. 
.thursday...southwest winds 5 to 10 knots becoming west. a chance
of showers thursday night. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sun sep 27 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 across ontario and southern 
quebec will drift to eastern quebec and labrador today. meanwhile, 
29.2 inch low pressure east of the delmarva will move to near the 
jersey shore and long island through tonight, then meander northeast 
along the new england coast monday through tuesday while gradually 
filling to 29.8 inches.


loz063>065-271500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sun sep 27 2026

.today...northeast winds to 30 knots diminishing to 15 to
25 knots. showers this afternoon. waves 5 to 8 feet. waves
occasionally around 10 feet. 
.tonight...northeast winds 15 to 25 knots. showers early, then a
chance of showers late in the evening. waves 4 to 7 feet
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 
.monday...northeast winds 5 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.monday night...northeast winds 5 to 15 knots becoming north.
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. waves 2 feet or less. 
.thursday...south winds 10 to 15 knots becoming west 15 to
20 knots. a chance of showers thursday night. waves 1 to 3 feet
building to 2 to 4 feet. 

$$