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open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt tue may 26 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 30.1 inch high will remain across the region today. a 
cold front associated with a 29.8 inch low over new england will 
drop south across the lake wednesday morning. a 30.2 inch high over 
canada will start to expand south over the lake on thursday into 
friday. a 29.6 inch low is expected to move across new england 
saturday.


loz063>065-270300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt tue may 26 2026

.tonight...southwest winds 5 to 15 knots becoming west. waves
1 to 3 feet. 
.wednesday...west winds 5 to 10 knots. waves 1 to 2 feet. 
.wednesday night...west winds 5 to 10 knots becoming north. waves
2 feet or less. 
.thursday...north winds 5 to 15 knots becoming west. waves 1 to
2 feet. 
.thursday night...west winds 5 to 10 knots becoming northwest.
waves 2 feet or less. 
.friday...west winds 5 to 10 knots becoming northwest and
increasing to 15 to 20 knots. a chance of showers friday night.
waves 1 foot or less building to 2 to 4 feet. 
.saturday...north winds 15 to 20 knots becoming northwest 5 to
15 knots. waves 2 to 4 feet subsiding to 1 foot or less. 
.sunday...northwest winds 5 to 10 knots. 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 tue may 26 2026


slz022-024-270300-
saint lawrence river from cape vincent to saint regis
403 pm edt tue may 26 2026

...small craft advisory in effect until 8 pm edt this evening...

.tonight...southwest winds 15 to 20 knots diminishing to less
than 10 knots. mainly clear this evening, then becoming partly
cloudy. 
.wednesday...light and variable winds becoming northwest 5 to
10 knots. partly to mostly sunny. 
.wednesday night...northwest winds 10 knots or less becoming
north. partly cloudy. 
.thursday...north winds 5 to 10 knots. mostly sunny. 
.thursday night...northwest winds 5 to 10 knots becoming light
and variable. partly to mostly cloudy. 
.friday...west winds 5 to 15 knots becoming northwest. a chance
of showers. 
.saturday...north winds 10 knots or less becoming northwest. a
chance of showers during the day. 
.sunday...west winds 10 knots or less. a chance of showers. 

$$