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open lake forecast for lake ontario
national weather service buffalo ny
1003 am edt fri may 29 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 over the central great lakes will 
settle into the ohio valley today. meanwhile a 29.6 inch low will 
make its way southeastward across quebec today and new england 
tonight, with its trailing cold front crossing the lake between late 
this afternoon and early this evening. a 30.2 inch high will then 
build across the great lakes and ohio valley saturday through 
sunday, with a 29.8 inch low forecast to push south across new 
england sunday night and monday. another 30.3 inch high will then 
build south across the great lakes tuesday.


loz063>065-292100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 am edt fri may 29 2026

.this afternoon...west winds 15 to 20 knots. a chance of showers
late. waves 1 to 3 feet building to 3 to 6 feet. 
.tonight...northwest winds 15 to 20 knots becoming north. a
chance of showers early. waves 3 to 6 feet. 
.saturday...north winds 15 to 20 knots becoming northwest 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.saturday night...northwest winds 10 knots or less becoming west.
waves 1 foot or less. 
.sunday...west winds 10 to 15 knots diminishing to 5 to 10 knots.
waves 1 to 2 feet building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.monday...northwest winds 5 to 10 knots. waves 2 feet or less. 
.tuesday...north winds 5 to 10 knots. waves 1 foot or less. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt fri may 29 2026


slz022-024-292100-
saint lawrence river from cape vincent to saint regis
1003 am edt fri may 29 2026

.this afternoon...southwest winds 10 to 15 knots becoming west.
showers likely. 
.tonight...northwest winds 15 to 20 knots becoming north. showers
early, then showers likely late in the evening. a chance of
showers after midnight. 
.saturday...north winds 5 to 15 knots becoming northeast. mostly
sunny. 
.saturday night...east winds less than 10 knots. mainly clear in
the evening, then becoming partly cloudy. 
.sunday...southwest winds 5 to 10 knots becoming light and
variable. a chance of showers. 
.monday...north winds less than 10 knots. a chance of showers. 
.tuesday...north winds 10 knots or less becoming northeast.
partly cloudy. 

$$