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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt mon oct 26 2026


slz022-024-261500-
saint lawrence river from cape vincent to saint regis
403 am edt mon oct 26 2026

.today...southwest winds 10 knots or less becoming northwest. a
chance of showers early, then showers likely late this morning. a
chance of showers early this afternoon. 
.tonight...north winds 5 to 10 knots. becoming mainly clear. 
.tuesday...north winds 5 to 10 knots becoming light and variable.
sunny.
.tuesday night...light and variable winds. mainly clear in the
evening, then becoming partly cloudy. 
.wednesday...light and variable winds becoming south 5 to
10 knots. partly to mostly cloudy. 
.thursday...south winds 5 to 10 knots becoming southwest. showers
likely thursday night. 
.friday...west winds 5 to 10 knots becoming light and variable. a
chance of rain showers during the day. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon oct 26 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 high pressure ridge averaging 30.5 inches exits 
southeastward before a cold front sweeps southeastward across the 
lake late this morning through early afternoon. behind the front, 
another ridge averaging 30.6 inches affects the lake through 
thursday as the embedded high pressure center wobbles southeastward 
from near manitoba to north atlantic waters southeast of the 
canadian maritimes. the ridge exits eastward thursday night as a 
cold front sweeps eastward across the lake. behind the front, 
another ridge averaging 30.2 inches builds from the western great 
lakes through this friday.


loz062-261500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt mon oct 26 2026

.today...west winds 5 to 15 knots becoming northwest. waves 1 to
3 feet. 
.tonight...northwest winds 10 to 15 knots becoming northeast.
waves 1 to 3 feet. 
.tuesday...northeast winds 5 to 15 knots becoming east. waves
1 to 3 feet. 
.tuesday night...east winds 5 to 15 knots. waves 1 to 2 feet. 
.wednesday...east winds 5 to 15 knots becoming southwest. waves
2 feet or less. 
.thursday...southwest winds 10 to 15 knots becoming west. a
chance of showers thursday night. waves 1 to 3 feet building to
2 to 4 feet. 
.friday...west winds 5 to 15 knots becoming north 10 knots or
less. 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 mon oct 26 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 high pressure ridge averaging 30.5 inches exits 
southeastward before a cold front sweeps southeastward across the 
lake late this morning through early afternoon. behind the front, 
another ridge averaging 30.6 inches affects the lake through 
thursday as the embedded high pressure center wobbles southeastward 
from near manitoba to north atlantic waters southeast of the 
canadian maritimes. the ridge exits eastward thursday night as a 
cold front sweeps eastward across the lake. behind the front, 
another ridge averaging 30.2 inches builds from the western great 
lakes through this friday.


loz063>065-261500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt mon oct 26 2026

.today...southwest winds 10 to 15 knots becoming northwest. waves
1 to 3 feet. 
.tonight...north winds 10 to 15 knots becoming northeast 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.tuesday...northeast winds 5 to 15 knots diminishing to less than
10 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday night...northeast winds 5 to 10 knots becoming
southeast. waves 1 foot or less. 
.wednesday...southeast winds 5 to 15 knots becoming south. waves
1 foot or less building to 1 to 3 feet. 
.thursday...south winds 10 to 15 knots becoming west. a chance of
showers thursday night. waves 1 to 3 feet. 
.friday...west winds 5 to 15 knots becoming north. a chance of
showers during the day. waves 1 to 3 feet subsiding to 1 foot or
less. 

$$