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open lake forecast for lake ontario
national weather service buffalo ny
403 am edt fri may 22 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 large 30.4 inch area of surface high pressure will 
build across the entire great lakes region today, before sliding 
east off the new england coast tonight. this surface high will then 
strengthen to 30.6 inches as it anchors over atlantic canada through 
sunday. a 29.9 inch low an attendant warm front will then slowly 
approach the lake late friday night and saturday, before weakening 
and sliding eastward sunday. 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.


loz062-221500-
lake ontario open waters from the niagara river to hamlin beach-
403 am edt fri may 22 2026

.today...east winds 10 to 15 knots increasing to 15 to 20 knots.
waves 1 to 3 feet building to 2 to 4 feet. 
.tonight...east winds 15 to 20 knots. waves 2 to 4 feet. 
.saturday...east winds 15 to 25 knots. rain. waves 3 to 6 feet
building to 4 to 7 feet. waves occasionally around 9 feet. 
.saturday night...east winds 15 to 25 knots. rain in the evening,
then showers overnight. waves 5 to 8 feet. waves occasionally
around 10 feet. 
.sunday...southeast winds 15 to 20 knots becoming southwest and
diminishing to less than 10 knots. showers during the day, then a
chance of showers sunday night. waves 3 to 5 feet subsiding to
2 feet or less. 
.monday...light and variable winds. a chance of showers during
the day. waves 1 foot or less. 
.tuesday...west winds 10 knots or less. waves 1 foot or less. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
403 am edt fri may 22 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 large 30.4 inch area of surface high pressure will 
build across the entire great lakes region today, before sliding 
east off the new england coast tonight. this surface high will then 
strengthen to 30.6 inches as it anchors over atlantic canada through 
sunday. a 29.9 inch low an attendant warm front will then slowly 
approach the lake late friday night and saturday, before weakening 
and sliding eastward sunday. 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.


loz063>065-221500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 am edt fri may 22 2026

.today...east winds 5 to 15 knots becoming northeast. waves 1 to
3 feet. 
.tonight...northeast winds 10 to 15 knots becoming east. waves
1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.saturday...southeast winds 10 to 15 knots increasing to 15 to
25 knots. rain. waves 1 to 3 feet building to 3 to 5 feet. 
.saturday night...southeast winds 15 to 25 knots. rain in the
evening, then showers overnight. waves 3 to 6 feet. 
.sunday...southeast winds 15 to 25 knots becoming south. showers
during the day, then a chance of showers sunday night. waves 3 to
5 feet subsiding to 1 to 3 feet. 
.monday...southwest winds 10 knots or less. a chance of showers
during the day. waves 2 feet or less. 
.tuesday...southwest 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
403 am edt fri may 22 2026


slz022-024-221500-
saint lawrence river from cape vincent to saint regis
403 am edt fri may 22 2026

.today...east winds 10 knots or less becoming northeast. partly
to mostly sunny. 
.tonight...northeast winds 10 knots or less becoming east. partly
cloudy in the evening, then becoming mostly cloudy. 
.saturday...east winds 10 knots or less becoming southeast.
mostly cloudy. 
.saturday night...southeast winds 5 to 10 knots. showers.
.sunday...southeast winds 5 to 10 knots becoming south. showers
during the day, then a chance of showers sunday night. 
.monday...south winds less than 10 knots. a chance of showers
during the day. 
.tuesday...southwest winds 10 knots or less. partly cloudy. 

$$