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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt wed sep 23 2026


slz022-024-240300-
saint lawrence river from cape vincent to saint regis
403 pm edt wed sep 23 2026

.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...north winds 10 knots or less becoming northeast. sunny.
.friday night...northeast winds 10 knots or less becoming north.
partly cloudy. 
.saturday...north winds 5 to 10 knots. partly to mostly cloudy. 
.sunday...northeast winds 10 knots or less. partly to mostly
cloudy. 
.monday...northeast winds less than 10 knots. partly cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 pm 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...an expansive 30.6 inch high will remain centered over 
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 29.3 
inches as it moves to just off the southern new england coast 
saturday night. this low will gradually fill to 29.6 inches by 
monday as it meanders near the new england coastline.


loz063>065-240300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt wed sep 23 2026

.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. waves
1 to 3 feet. 
.friday night...north winds 10 to 15 knots increasing to 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. 
.monday...north winds 10 knots or less becoming southwest. waves
2 feet or less. 

$$