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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt sun may 24 2026


slz022-024-250300-
saint lawrence river from cape vincent to saint regis
403 pm edt sun may 24 2026

.tonight...southeast winds 10 knots or less. a chance of showers
late this evening. rain after midnight. 
.monday...south winds 10 knots or less becoming west. showers
early, then a chance of showers late in the morning. 
.monday night...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...west winds 10 knots or less becoming north. partly
cloudy. 
.thursday...north winds 5 to 10 knots becoming light and
variable. partly cloudy. 
.friday...west winds 10 knots or less. a chance of showers. 

$$

fzus61 kbuf 242002
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open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sun may 24 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 30.0 inch low and associated warm front will track 
just south of the lake tonight and to new england by monday morning. 
a 30.1 inch high will settle across the region monday through 
tuesday. a cold front associated with a 29.8 inch low over new 
england will drop south across the lake on wednesday morning. a 30.2 
inch surface high pressure over canada will start to expand south 
over the lake on thursday into friday.


loz062-250300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt sun may 24 2026

.tonight...east winds 10 knots or less becoming west. a chance of
showers early, then rain. a chance of showers late. patchy fog
after midnight. waves 2 feet or less. 
.monday...northwest winds 10 knots or less becoming southwest.
patchy fog in the morning. waves 1 foot or less. 
.monday night...southwest winds 5 to 10 knots. waves 1 foot or
less. 
.tuesday...southwest winds 5 to 15 knots. waves 1 to 3 feet. 
.tuesday night...southwest winds 10 to 15 knots. waves 1 to
3 feet. 
.wednesday...west winds 5 to 10 knots becoming north. waves
2 feet or less. 
.thursday...north winds 5 to 10 knots becoming northwest. waves
1 foot or less. 
.friday...west winds 5 to 10 knots. waves 2 feet or less. 

$$

fzus61 kbuf 242002
glflo 
expires:202605250300;;584135

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sun may 24 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 30.0 inch low and associated warm front will track 
just south of the lake tonight and to new england by monday morning. 
a 30.1 inch high will settle across the region monday through 
tuesday. a cold front associated with a 29.8 inch low over new 
england will drop south across the lake on wednesday morning. a 30.2 
inch surface high pressure over canada will start to expand south 
over the lake on thursday into friday.


loz063>065-250300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sun may 24 2026

.tonight...southeast winds 15 to 20 knots becoming south 10 to
15 knots. a chance of showers early, then rain from late evening
on. patchy fog late. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday...southwest winds 5 to 10 knots becoming west. a chance
of showers early. patchy fog in the morning. waves 2 feet or
less. 
.monday night...southwest winds 5 to 10 knots. waves 2 feet or
less. 
.tuesday...southwest winds 5 to 10 knots. waves 2 feet or less. 
.tuesday night...southwest winds 10 to 15 knots becoming west.
waves 1 to 3 feet. 
.wednesday...west winds 5 to 10 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 10 knots. waves 2 feet or less. 

$$