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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt tue sep 22 2026


slz022-024-221500-
saint lawrence river from cape vincent to saint regis
403 am edt tue sep 22 2026

.today...northeast winds 5 to 10 knots. sunny.
.tonight...northeast winds 5 to 10 knots. mainly clear. 
.wednesday...northeast winds 10 knots or less. sunny.
.wednesday night...northeast winds 10 knots or less. mainly
clear. 
.thursday...northeast winds 10 knots or less. mainly clear. 
.friday...north winds 5 to 10 knots. partly cloudy. 
.saturday...north winds 5 to 15 knots. partly cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt tue sep 22 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 30.6 inch high will remain centered from 
eastern ontario province to southern quebec through saturday while 
gradually weakening to 30.3 inches late this week. an elongated 29.6 
inch low well offshore of the mid atlantic coast friday is forecast 
to strengthen to 29.2 inches as it moves to just off the southern 
new england coast saturday night through sunday.


loz063>065-221500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt tue sep 22 2026

.today...east winds 15 to 20 knots becoming northeast. waves 3 to
6 feet. 
.tonight...northeast winds 15 to 20 knots becoming east. waves
3 to 5 feet. 
.wednesday...east winds 10 to 15 knots becoming northeast 15 to
20 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.wednesday night...northeast winds 15 to 20 knots becoming
southeast 10 to 15 knots. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.thursday...east winds 5 to 15 knots becoming northeast. waves
1 to 3 feet. 
.friday...northeast winds 10 to 15 knots becoming north 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...north winds 15 to 20 knots. waves 3 to 5 feet
subsiding to 1 to 3 feet. 

$$