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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm 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 29.6 inch low will make its way southeastward across 
new england tonight. a 30.2 inch high will build across the great 
lakes and ohio valley this weekend, 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>065-300900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt fri may 29 2026

.overnight...north winds 15 to 25 knots. waves 4 to 7 feet
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 
.saturday...north winds 15 to 25 knots diminishing to 10 to
15 knots. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.saturday night...northwest winds 10 knots or less becoming west.
waves 2 feet or less. 
.sunday...west winds 5 to 15 knots increasing to 15 to 20 knots.
waves 1 to 3 feet building to 2 to 4 feet. 
.sunday night...west winds 15 to 20 knots becoming northwest 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday...north winds 10 knots or less becoming northwest. waves
2 feet or less. 
.tuesday...northwest winds 10 knots or less. waves 2 feet or
less. 
.wednesday...northwest winds 10 knots or less becoming west.
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 pm edt fri may 29 2026


slz022-024-300900-
saint lawrence river from cape vincent to saint regis
1003 pm edt fri may 29 2026

.overnight...north winds 15 to 20 knots. a chance of
showers. 
.saturday...north winds 15 to 20 knots becoming northeast 5 to
15 knots. becoming mostly sunny. 
.saturday night...northeast winds 5 to 10 knots becoming light
and variable. mainly clear in the evening, then becoming partly
cloudy. 
.sunday...southwest winds 10 knots or less becoming west. a
chance of showers in the afternoon. 
.sunday night...west winds 5 to 10 knots becoming light and
variable. a chance of showers. 
.monday...north winds less than 10 knots. a chance of showers
during the day. 
.tuesday...north winds less than 10 knots. partly cloudy. 
.wednesday...north winds less than 10 knots. mainly clear. 

$$