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


slz022-024-280300-
saint lawrence river from cape vincent to saint regis
403 pm edt sun sep 27 2026

.tonight...northeast winds 5 to 15 knots. showers likely early,
then a chance of showers late this evening. 
.monday...northeast winds 5 to 10 knots. a chance of showers
early. 
.monday night...northeast winds 10 knots or less. cloudy.
.tuesday...north winds less than 10 knots. mostly cloudy in the
morning, then becoming mostly sunny. 
.tuesday night...light and variable winds. mainly clear in the
evening, then becoming partly cloudy. 
.wednesday...south winds 10 knots or less. mostly cloudy. 
.thursday...south winds 5 to 15 knots becoming southwest. a
chance of showers thursday night. 
.friday...west winds 10 knots or less. a chance of showers during
the day. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 pm 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...a 29.5 inch low near the jersey shore tonight will move 
slowly northeast along the new england coast through tuesday while 
filling to 29.8 inches. this low will finally dissipate over the 
north atlantic wednesday as a 30.1 inch high builds to just off the 
mid atlantic coast. a cold front over the upper great lakes 
wednesday night will cross the lower great lakes thursday night. a 
30.4 inch high is then forecast to build into the upper great lakes 
friday and the lower great lakes by saturday.


loz063>065-280300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sun sep 27 2026

.tonight...northeast winds 15 to 25 knots diminishing to 10 to
15 knots. showers early, then a chance of showers late this
evening. waves 4 to 7 feet subsiding to 2 to 4 feet. waves
occasionally around 9 feet. 
.monday...northeast winds 5 to 15 knots. waves 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 northwest. waves
1 foot or less. 
.tuesday night...light and variable winds becoming south 5 to
10 knots. waves 1 foot or less. 
.wednesday...south winds 5 to 15 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. 
.friday...northwest winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers during the day. waves 2 to 4 feet. 

$$