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open lake forecast for lake ontario
national weather service buffalo ny
1001 am edt fri jun 5 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 will drift 
off the southeast coast today. a weak cold front will settle south 
across the lower great lakes saturday and 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>065-052100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1001 am edt fri jun 5 2026

.this afternoon...south winds 5 to 10 knots becoming southeast.
waves 1 foot or less. 
.tonight...south winds 5 to 15 knots. a chance of showers after
midnight. showers likely late. waves 2 feet or less. 
.saturday...southwest winds 10 to 15 knots becoming west 15 to
20 knots. showers likely in the morning, then showers likely with
a chance of thunderstorms in the afternoon. waves 1 to 3 feet
building to 3 to 5 feet. 
.saturday night...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers and thunderstorms in the evening,
then a chance of showers overnight. waves 3 to 5 feet subsiding
to 1 to 3 feet. 
.sunday...west winds 5 to 15 knots becoming northeast. waves 1 to
3 feet subsiding to 1 foot or less. 
.monday...northeast winds 5 to 10 knots becoming southeast. waves
1 foot 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
1001 am edt fri jun 5 2026


slz022-024-052100-
saint lawrence river from cape vincent to saint regis
1001 am edt fri jun 5 2026

.this afternoon...southwest winds 5 to 10 knots. partly sunny. 
.tonight...southwest winds 10 knots or less becoming south.
showers likely after midnight. 
.saturday...south winds 5 to 15 knots becoming southwest. showers
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 10 knots or less becoming northeast. a
chance of showers during the day. 
.monday...northeast winds less than 10 knots. mainly clear. 
.tuesday...south winds less than 10 knots. mainly clear. 

winds and waves higher in and near thunderstorms.

$$