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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon jun 22 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 29.7 inch low will move south of the lower great lakes 
today and tonight, before moving off the new england coast by 
tuesday. a broad area of high pressure averaging 30.1 inches will 
advance over the eastern great lakes region tuesday and wednesday, 
before exiting east into new england on thursday as a weak 29.8 inch 
low moves east into the central great lakes. this low is forecasted 
to move north of the lake friday, with its associated weak cold 
front crossing the lake.


loz063>065-221500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt mon jun 22 2026

.today...southeast winds 5 to 10 knots becoming east. a chance of
showers early, then rain from late morning on. waves 2 feet or
less. 
.tonight...northeast winds 5 to 10 knots becoming northwest. a
chance of showers early. waves 2 feet or less. 
.tuesday...northwest winds 5 to 15 knots becoming west. waves
2 feet or less. 
.tuesday night...west winds 5 to 15 knots becoming northwest.
waves 1 to 3 feet. 
.wednesday...west winds 5 to 15 knots becoming southwest less
than 10 knots. waves 2 feet or less. 
.thursday...south winds 5 to 15 knots. showers likely with a
chance of thunderstorms. waves 2 feet or less. 
.friday...southwest winds 5 to 15 knots becoming west. a chance
of showers during the day. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am edt mon jun 22 2026


slz022-024-221500-
saint lawrence river from cape vincent to saint regis
402 am edt mon jun 22 2026

.today...south winds 10 knots or less. a chance of showers this
afternoon. 
.tonight...southeast winds less than 10 knots. a chance of
showers early. 
.tuesday...light and variable winds becoming northwest 5 to
10 knots. mostly sunny. 
.tuesday night...northwest winds 10 knots or less becoming west.
becoming mainly clear. 
.wednesday...west winds 5 to 10 knots becoming light and
variable. mainly clear, then becoming mostly cloudy. 
.thursday...southwest winds less than 10 knots. a chance of
showers during the day, then showers with a chance of
thunderstorms thursday night. 
.friday...southwest winds 10 knots or less. showers likely with a
chance of thunderstorms. 

winds and waves higher in and near thunderstorms.

$$