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


slz022-260300-
saint lawrence river from cape vincent to ogdensburg-
403 pm edt mon may 25 2026

.tonight...southwest winds 10 knots or less. mainly clear early,
then becoming 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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open lake forecast for lake ontario
national weather service buffalo ny
403 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.


loz062-260300-
lake ontario open waters from the niagara river to hamlin beach-
403 pm edt mon may 25 2026

.tonight...southwest winds 5 to 10 knots. waves 2 feet or less. 
.tuesday...southwest winds 5 to 15 knots. waves 2 feet or less. 
.tuesday night...southwest winds 10 to 15 knots. waves 1 to
3 feet. 
.wednesday...west winds 5 to 10 knots. waves 2 feet or less. 
.wednesday night...northwest winds 5 to 15 knots becoming north.
waves 2 feet or less. 
.thursday...north winds 5 to 10 knots becoming northwest. waves
1 to 2 feet. 
.friday...west winds 5 to 10 knots becoming northwest. waves 1 to
2 feet. 
.saturday...north winds 5 to 10 knots. waves 2 feet or less. 

$$

fzus61 kbuf 252003
glflo 
expires:202605260300;;639812

open lake forecast for lake ontario
national weather service buffalo ny
403 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>065-260300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt mon may 25 2026

.tonight...southwest winds 5 to 15 knots. waves 2 feet or less. 
.tuesday...southwest winds 5 to 15 knots. 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. 

$$