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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
issued by national weather service cleveland oh
1002 am edt wed sep 23 2026


slz022-024-232115-
saint lawrence river from cape vincent to saint regis
1006 am edt wed sep 23 2026

.this afternoon...northeast winds 5 to 10 knots. sunny.
.tonight...northeast winds 10 knots or less. clear.
.thursday...northeast winds 10 knots or less. sunny.
.thursday night...northeast winds 10 knots or less. mainly clear.
.friday...northeast winds 5 to 10 knots becoming north. mainly
clear, then becoming partly cloudy. 
.saturday...north winds 5 to 10 knots. partly cloudy. 
.sunday...northeast winds 10 knots or less. partly cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
issued by national weather service cleveland oh
1005 am edt wed sep 23 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 30.2 inch high will settle over the lower great lakes 
tonight. this high will then drift to the eastern seaboard tuesday, 
then east of the mid atlantic coast by wednesday. meanwhile, a 29.3 
inch low over far northwest ontario province tuesday night will move 
to hudson bay by late wednesday, then to northern quebec by thursday 
while deepening to 29.0 inches. a trailing cold front will cross the 
lower great lakes wednesday night, with a 30.0 inch high building 
east across the eastern great lakes region thursday through friday, 
before sliding east into new england by saturday.


loz063>065-232115-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1005 am edt wed sep 23 2026

.this afternoon...east winds 10 to 15 knots becoming northeast
15 to 20 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...northeast winds 15 to 20 knots becoming southeast 5 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.thursday...east winds 5 to 15 knots becoming northeast. waves
2 feet or less. 
.thursday night...northeast winds 10 to 15 knots. waves 1 to
3 feet. 
.friday...northeast winds 10 to 15 knots becoming north 15 to
20 knots. waves 1 to 3 feet. 
.saturday...north winds 15 to 20 knots. waves 2 to 4 feet. 
.sunday...north winds 15 to 20 knots becoming northeast 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 

$$