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open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt thu oct 15 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 30.1 inches continues to 
exit eastward from the lake. elsewhere, a low wobbles northeastward 
from the southwestern great lakes to southern quebec tonight through 
friday and deepens to 29.4 inches. this low track will allow a warm 
front to sweep northeastward across the lake tonight and a strong 
cold front to sweep eastward across the lake on friday. behind the 
cold front, a ridge averaging 30.2 inches should affect the lake 
through this tuesday as one embedded high pressure center moves from 
the central great plains and vicinity to the canadian maritimes on 
friday through monday, and then another embedded and reinforcing 
high pressure center moves from near manitoba toward quebec this 
monday through tuesday.


loz063>065-160900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 pm edt thu oct 15 2026

.rest of tonight...east winds 15 to 25 knots becoming southeast
to 30 knots. a chance of rain late this evening, then rain after
midnight. waves 1 to 3 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 
.friday...south winds to 30 knots becoming west. rain through
early afternoon, then a chance of rain late. waves 4 to 7 feet
building to 6 to 9 feet. waves occasionally around 11 feet. 
.friday night...northwest winds to 30 knots becoming north. a
chance of rain. waves 5 to 9 feet. waves occasionally around
11 feet. 
.saturday...north winds to 30 knots becoming northwest and
diminishing to 10 to 15 knots in the afternoon. waves 5 to 8 feet
subsiding to 2 to 4 feet. waves occasionally around 10 feet. 
.saturday night...west winds 15 to 20 knots. waves 2 to 4 feet
building to 3 to 5 feet. 
.sunday...southwest winds 15 to 20 knots. waves 3 to 5 feet
subsiding to 2 to 4 feet. 
.monday...southwest winds 15 to 20 knots diminishing to 5 to
15 knots. waves 2 to 4 feet subsiding to 1 foot or less. 
.tuesday...west winds 10 knots or less becoming northeast. waves
1 foot or less. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt thu oct 15 2026


slz022-024-160900-
saint lawrence river from cape vincent to saint regis
1003 pm edt thu oct 15 2026

.overnight...east winds 5 to 10 knots. rain.
.friday...southeast winds 10 to 15 knots becoming west 15 to
20 knots. rain.
.friday night...northwest winds 15 to 20 knots. a chance of rain
in the evening. 
.saturday...northwest winds 15 to 20 knots becoming west 5 to
15 knots. sunny.
.saturday night...west winds 10 knots or less becoming southwest.
mainly clear in the evening, then becoming partly cloudy. 
.sunday...southwest winds 5 to 15 knots. mainly clear. 
.monday...southwest winds 5 to 15 knots diminishing to less than
10 knots. mainly clear, then becoming partly cloudy. 
.tuesday...light and variable winds. becoming mainly clear. 

$$