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open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt tue oct 27 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 ridge averaging 30.6 inches affects the lake through 
thursday as the embedded high pressure center wobbles southeastward 
from northern ontario 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 saturday. the high will drift eastward while a 
29.9 inch low is expected to move into the lower mississippi valley 
sunday.


loz063>065-280300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt tue oct 27 2026

.tonight...northeast winds 10 knots or less becoming southeast
10 to 15 knots. waves 2 feet or less. 
.wednesday...southeast winds 5 to 10 knots. waves 2 feet or less.
.wednesday night...southeast winds 5 to 15 knots becoming south.
waves 2 feet or less. 
.thursday...south winds 10 to 15 knots becoming southwest. waves
1 to 3 feet. 
.thursday night...southwest winds 15 to 20 knots becoming west. a
chance of showers. waves 2 to 4 feet. 
.friday...west winds 15 to 20 knots becoming northwest 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.saturday...northwest winds 10 knots or less becoming southeast.
waves 2 feet or less. 
.sunday...southeast winds 5 to 10 knots becoming south. a chance
of showers sunday night. 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
403 pm edt tue oct 27 2026


slz022-024-280300-
saint lawrence river from cape vincent to saint regis
403 pm edt tue oct 27 2026

.tonight...light and variable winds. mainly clear this evening,
then becoming mostly cloudy. 
.wednesday...light and variable winds. mostly cloudy through
early afternoon, then becoming partly sunny. 
.wednesday night...light and variable winds becoming south 5 to
10 knots. mainly clear. 
.thursday...south winds 5 to 15 knots becoming southwest. a
chance of rain showers in the afternoon. 
.thursday night...southwest winds 15 to 20 knots becoming west
5 to 15 knots. a chance of showers. 
.friday...west winds 5 to 15 knots becoming northwest less than
10 knots. partly cloudy. 
.saturday...light and variable winds. mainly clear, then becoming
partly cloudy. 
.sunday...light and variable winds. a chance of rain showers
sunday night. 

$$