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open lake forecast for lake ontario
national weather service buffalo ny
1003 am edt sun may 31 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 30.2 inch high will move southward across lake 
erie through tonight. this will allow a back door cold front to clip 
the eastern lake waters through evening, this from a 29.8 inch area 
of low pressure that will push south across southern quebec and new 
england through tonight. this low will then push off the new england 
coastline on monday. another 30.4 inch high centered over hudson bay 
monday night will then build south across the entire great lakes 
region tuesday and wednesday, then into the ohio valley and lower 
great lakes by thursday.


loz062-312100-
lake ontario open waters from the niagara river to hamlin beach-
1003 am edt sun may 31 2026

.this afternoon...west winds 10 to 15 knots becoming southwest.
waves 1 to 2 feet. 
.tonight...west winds 5 to 15 knots becoming northwest less than
10 knots. waves 1 to 2 feet. 
.monday...north winds less than 10 knots becoming east. waves
1 foot or less. 
.monday night...east winds less than 10 knots. waves 1 foot or
less. 
.tuesday...northwest winds 10 knots or less. waves 1 foot or
less. 
.wednesday...west winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.thursday...southwest winds 5 to 15 knots. waves 2 feet or less. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1003 am edt sun may 31 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 30.2 inch high will move southward across lake 
erie through tonight. this will allow a back door cold front to clip 
the eastern lake waters through evening, this from a 29.8 inch area 
of low pressure that will push south across southern quebec and new 
england through tonight. this low will then push off the new england 
coastline on monday. another 30.4 inch high centered over hudson bay 
monday night will then build south across the entire great lakes 
region tuesday and wednesday, then into the ohio valley and lower 
great lakes by thursday.


loz063>065-312100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 am edt sun may 31 2026

.this afternoon...west winds 15 to 20 knots. a chance of showers
late. waves 1 to 3 feet building to 3 to 5 feet. 
.tonight...west winds 15 to 20 knots becoming northwest 5 to
15 knots. a chance of showers in the evening. waves 2 to 4 feet
subsiding to 1 to 2 feet. 
.monday...north winds 5 to 10 knots. waves 1 foot or less. 
.monday night...north winds 10 knots or less. waves 1 foot or
less. 
.tuesday...northwest winds 10 knots or less becoming west. waves
1 foot or less. 
.wednesday...west winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.thursday...southwest 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
1003 am edt sun may 31 2026


slz022-024-312100-
saint lawrence river from cape vincent to saint regis
1003 am edt sun may 31 2026

.this afternoon...southwest winds 5 to 10 knots becoming
northwest. a chance of showers. 
.tonight...northwest winds 10 knots or less. showers likely
early, then a chance of showers late in the evening. 
.monday...north winds less than 10 knots becoming northeast.
sunny.
.monday night...northeast winds less than 10 knots. mainly clear.
.tuesday...northwest winds less than 10 knots. partly cloudy. 
.wednesday...light and variable winds. mainly clear. 
.thursday...southwest winds 10 knots or less. mainly clear, then
becoming partly cloudy. 

$$