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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am edt sat oct 17 2026


slz022-024-171500-
saint lawrence river from cape vincent to saint regis
402 am edt sat oct 17 2026

.today...northwest winds 5 to 15 knots becoming west. sunny.
.tonight...southwest winds 10 knots or less. mainly clear in the
evening, then becoming partly cloudy. 
.sunday...southwest winds 5 to 15 knots. sunny.
.sunday night...southwest winds 5 to 15 knots. mainly clear. 
.monday...southwest winds 5 to 10 knots becoming light and
variable. mainly clear. 
.tuesday...northeast winds less than 10 knots. mainly clear. 
.wednesday...northeast winds less than 10 knots. mainly clear. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
401 am edt sat oct 17 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 29.1 inch low over the canadian maritimes today will 
move northeast and into the north atlantic by this evening. a 30.5 
inch high will then build into the ohio valley tonight, expanding 
into the mid atlantic and new england sunday through monday while 
gradually weakening to 30.3 inches. another 30.4 inch high will then 
build east across quebec tuesday through wednesday.


loz063>065-171500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
401 am edt sat oct 17 2026

.today...north winds 15 to 25 knots becoming northwest and
diminishing to 10 to 15 knots. waves 4 to 7 feet subsiding to
1 to 2 feet. waves occasionally around 9 feet. 
.tonight...west winds 10 to 15 knots becoming southwest. waves
1 to 3 feet. 
.sunday...southwest winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.sunday night...southwest winds 10 to 15 knots. waves 1 to
3 feet. 
.monday...southwest winds 5 to 15 knots becoming north less than
10 knots. waves 1 to 3 feet subsiding to 1 foot or less. 
.tuesday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.wednesday...northeast winds 5 to 15 knots becoming southeast.
waves 2 feet or less. 

$$