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open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt mon jun 1 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 30.4 inch high will build into the great lakes tonight 
through tuesday, then gradually expand to the ohio valley and 
eastern seaboard wednesday through thursday. this high will 
eventually drift off the southeast coast friday. a weak cold front 
will then settle south across the lower great lakes saturday.


loz063>065-020300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt mon jun 1 2026

.tonight...north winds 5 to 15 knots becoming northwest less than
10 knots. waves 2 feet or less. 
.tuesday...west winds 10 knots or less. waves 1 foot or less. 
.tuesday night...west winds 5 to 10 knots. waves 1 foot or less. 
.wednesday...west winds 5 to 10 knots. waves 2 feet or less. 
.wednesday night...southwest winds 5 to 10 knots. waves 2 feet or
less. 
.thursday...southwest winds 5 to 10 knots. waves 2 feet or less. 
.friday...southwest winds 5 to 15 knots. a chance of showers
friday night. waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots becoming east. a chance
of showers. waves 2 feet 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 mon jun 1 2026


slz022-024-020300-
saint lawrence river from cape vincent to saint regis
403 pm edt mon jun 1 2026

.tonight...northeast winds 5 to 10 knots becoming light and
variable. mainly clear. 
.tuesday...light and variable winds becoming north 5 to 10 knots.
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 10 knots or less. mainly
clear. 
.thursday...southwest winds 10 knots or less. mainly clear, then
becoming mostly cloudy. 
.friday...southwest winds 10 knots or less. a chance of showers
friday night. 
.saturday...southwest winds 10 knots or less becoming northeast.
a chance of showers. 

$$