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open lake forecast for lake ontario
national weather service buffalo ny
403 am edt tue oct 6 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 30.2 inch high will build east across the mid-alantic 
region today, then slide out to sea tonight through wednesday. a 
cold front will then pass across the lake thursday. a 30.1 inch 
surface high will then ridge north across the lake friday then drift 
off the coast over the weekend. 
.


loz063>065-061500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 am edt tue oct 6 2026

.today...northwest winds 5 to 15 knots becoming west. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...west winds 5 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.wednesday...south winds 15 to 25 knots becoming southwest. a
chance of showers in the afternoon. waves 3 to 5 feet. 
.wednesday night...southwest winds 15 to 20 knots becoming west
10 to 15 knots. showers likely. waves 2 to 4 feet. 
.thursday...west winds 15 to 20 knots. a chance of showers. waves
2 to 4 feet building to 3 to 6 feet, then subsiding to 2 to
4 feet. 
.friday...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.saturday...west winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. waves 1 to 3 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt tue oct 6 2026


slz022-024-061500-
saint lawrence river from cape vincent to saint regis
403 am edt tue oct 6 2026

.today...west winds 5 to 10 knots. sunny.
.tonight...southwest winds 10 knots or less becoming south 10 to
15 knots. mainly clear in the evening, then becoming mostly
cloudy. 
.wednesday...south winds 10 to 15 knots becoming southwest. a
chance of showers. 
.wednesday night...southwest winds 5 to 15 knots. showers likely.
.thursday...southwest winds 5 to 15 knots becoming west. a chance
of showers. 
.friday...west winds 10 knots or less. a chance of rain showers. 
.saturday...west winds 10 knots or less becoming south. mainly
clear, then becoming partly cloudy. 

$$