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


slz022-024-231500-
saint lawrence river from cape vincent to saint regis
403 am edt wed sep 23 2026

.today...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
402 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...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.


loz062-231500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt wed sep 23 2026

.today...east winds 15 to 20 knots. waves 3 to 6 feet. 
.tonight...east winds 15 to 25 knots becoming southeast and
diminishing to 10 to 15 knots. waves 3 to 6 feet subsiding to
2 to 3 feet. 
.thursday...southeast winds 5 to 15 knots becoming east. waves
1 to 3 feet. 
.thursday night...east winds 5 to 15 knots becoming northeast.
waves 1 to 2 feet. 
.friday...northeast winds 5 to 15 knots becoming north. waves
2 feet or less. 
.saturday...north winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday...north winds 5 to 15 knots. waves 1 to 3 feet subsiding
to 1 foot or less. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 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...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>065-231500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt wed sep 23 2026

.today...east winds 15 to 20 knots becoming northeast. 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. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
352 am edt wed sep 23 2026

for waters beyond five nautical miles of shore on lake erie

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 trough averaging 30.20 inches will persist across the ohio
valley today before moving south. high pressure of 30.40 inches 
will build south across the great lakes thursday and influence the
great lakes through early next week. 


lez061-169-231415-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
352 am edt wed sep 23 2026

.today...east winds 15 to 20 knots. waves 2 to 4 feet. 
.tonight...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.thursday...east winds 5 to 15 knots becoming northeast 15 to
20 knots. waves 1 to 3 feet. 
.thursday night...northeast winds 15 to 20 knots becoming east
5 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.saturday...northeast winds 5 to 10 knots becoming north. waves
2 feet or less. 
.sunday...north winds 10 knots or less becoming northeast. waves
1 foot or less. 

$$