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


slz022-024-230300-
saint lawrence river from cape vincent to saint regis
403 pm edt mon jun 22 2026

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

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 pm 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 29.8 inch low will move through the mid atlantic 
states tonight before moving off the southern new england coast 
tuesday. a 30.1 inch high will then build into the ohio valley 
tuesday night through wednesday, then drift to the eastern seaboard 
wednesday night through thursday. a weak 29.9 inch low is then 
forecast to move from the central great lakes thursday to southern 
quebec friday, then the canadian maritimes saturday.


loz062-230300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt mon jun 22 2026

.tonight...northeast winds 5 to 15 knots becoming west. patchy
fog after midnight. patchy drizzle after midnight. waves 1 to
3 feet. 
.tuesday...west winds 5 to 10 knots. patchy fog early. patchy
drizzle early. waves 1 foot or less. 
.tuesday night...west winds 5 to 15 knots becoming northwest.
waves 2 feet or less. 
.wednesday...west winds less than 10 knots becoming southwest.
waves 1 foot or less. 
.wednesday night...southwest winds less than 10 knots becoming
south. waves 1 foot or less. 
.thursday...southeast winds 10 knots or less becoming southwest.
showers likely with a chance of thunderstorms. waves 1 foot or
less. 
.friday...west winds 10 knots or less becoming northwest. waves
1 foot or less. 
.saturday...northwest winds 10 knots or less. waves 1 foot or
less. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 pm 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 29.8 inch low will move through the mid atlantic 
states tonight before moving off the southern new england coast 
tuesday. a 30.1 inch high will then build into the ohio valley 
tuesday night through wednesday, then drift to the eastern seaboard 
wednesday night through thursday. a weak 29.9 inch low is then 
forecast to move from the central great lakes thursday to southern 
quebec friday, then the canadian maritimes saturday.


loz063>065-230300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt mon jun 22 2026

.tonight...northeast winds 15 to 20 knots becoming northwest
10 to 15 knots. a chance of rain with patchy drizzle early. waves
1 to 3 feet. 
.tuesday...northwest winds 5 to 15 knots becoming west. patchy
fog early. patchy drizzle early. waves 2 feet or less. 
.tuesday night...west winds 5 to 15 knots becoming northwest.
waves 1 to 2 feet. 
.wednesday...northwest winds 5 to 15 knots becoming west. waves
2 feet or less. 
.wednesday night...west winds 10 knots or less becoming south.
waves 2 feet or less. 
.thursday...southeast winds 5 to 10 knots becoming south. showers
likely with a chance of thunderstorms. waves 1 foot or less. 
.friday...southwest winds 5 to 15 knots becoming west less than
10 knots. a chance of showers during the day. waves 2 feet or
less. 
.saturday...west winds 10 knots or less becoming northwest. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$