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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu jun 4 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 along the eastern seaboard tonight will 
drift off the southeast coast friday. a weak cold front will settle 
south across the lower great lakes saturday through saturday night. 
another 30.2 inch high over quebec sunday will build southeast into 
new england monday, then remain near, or just off the east coast 
through wednesday.


loz063>065-050900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt thu jun 4 2026

.overnight...southwest winds 5 to 10 knots. waves 2 feet or
less. 
.friday...southwest winds 5 to 10 knots becoming south. waves
1 foot or less. 
.friday night...south winds 5 to 15 knots. showers likely
overnight. waves 2 feet or less. 
.saturday...southwest winds 10 to 15 knots becoming west 15 to
20 knots. showers likely. waves 1 to 3 feet building to 2 to
4 feet. 
.saturday night...west winds 15 to 20 knots diminishing to 5 to
15 knots. showers likely in the evening, then a chance of showers
overnight. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.sunday...west winds 5 to 10 knots becoming northeast. waves
2 feet or less. 
.monday...northeast winds 5 to 10 knots becoming southeast. waves
2 feet or less. 
.tuesday...southeast winds 10 knots or less becoming south. waves
1 foot or less. 

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
1003 pm edt thu jun 4 2026


slz022-024-050900-
saint lawrence river from cape vincent to saint regis
1003 pm edt thu jun 4 2026

.overnight...southwest winds 10 knots or less. partly
cloudy. 
.friday...southwest winds 10 knots or less. partly sunny. 
.friday night...southwest winds 10 knots or less. a chance of
showers in the evening, then showers likely overnight. 
.saturday...southwest winds 5 to 10 knots. showers likely in the
morning, then showers with a chance of thunderstorms in the
afternoon. 
.saturday night...southwest winds 10 knots or less becoming west.
showers with a chance of thunderstorms in the evening, then
showers likely overnight. 
.sunday...northwest winds 5 to 10 knots becoming northeast. a
chance of showers and thunderstorms. 
.monday...northeast winds 5 to 10 knots becoming light and
variable. mainly clear. 
.tuesday...south winds less than 10 knots. mainly clear. 

winds and waves higher in and near thunderstorms.

$$