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open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt mon may 25 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 settle across the region through 
tuesday. 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.


loz063>065-260900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 pm edt mon may 25 2026

.overnight...southwest winds 5 to 10 knots. patchy fog
late. waves 2 feet or less. 
.tuesday...southwest winds 5 to 15 knots. areas of fog early.
waves 2 feet or less. 
.tuesday night...southwest winds 5 to 15 knots becoming west.
waves 2 feet or less. 
.wednesday...west winds 5 to 10 knots. waves 1 to 2 feet. 
.wednesday night...west winds 5 to 15 knots becoming north. waves
2 feet or less. 
.thursday...north winds 5 to 15 knots becoming northwest. waves
2 feet or less. 
.friday...west winds 5 to 15 knots becoming northwest. waves
2 feet or less. 
.saturday...north winds 5 to 15 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
1003 pm edt mon may 25 2026


slz022-260900-
saint lawrence river from cape vincent to ogdensburg-
1003 pm edt mon may 25 2026

.overnight...southwest winds 10 knots or less. partly
cloudy. 
.tuesday...southwest winds 5 to 15 knots. sunny.
.tuesday night...southwest winds 5 to 15 knots diminishing to
less than 10 knots. mainly clear in the evening, then becoming
partly cloudy. 
.wednesday...southwest winds less than 10 knots. mostly sunny. 
.wednesday night...northwest winds 10 knots or less becoming
north. partly cloudy. 
.thursday...north winds 10 knots or less becoming northwest.
partly cloudy. 
.friday...west winds 5 to 10 knots becoming northwest. a chance
of showers. 
.saturday...north winds 10 knots or less. a chance of showers
during the day. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt mon may 25 2026


slz024-260900-
saint lawrence river from ogdensburg to saint regis-
1003 pm edt mon may 25 2026

.overnight...southwest winds 10 knots or less. partly
cloudy. 
.tuesday...southwest winds 5 to 15 knots increasing to 15 to
20 knots. sunny.
.tuesday night...southwest winds 15 to 20 knots diminishing to
less than 10 knots. mainly clear in the evening, then becoming
partly cloudy. 
.wednesday...light and variable winds becoming northwest 5 to
10 knots. mostly sunny. 
.wednesday night...northwest winds less than 10 knots. partly
cloudy. 
.thursday...north winds 5 to 10 knots becoming light and
variable. partly cloudy. 
.friday...west winds 10 knots or less becoming northwest. a
chance of showers. 
.saturday...northeast winds 5 to 10 knots becoming light and
variable. a chance of showers. 

$$