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open lake forecast for lake ontario
national weather service buffalo ny
1004 pm 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 lower great lakes and 
ohio valley by thursday, before settling off the mid 
atlantic/carolina coastline by friday.


loz063>065-010900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1004 pm edt sun may 31 2026

.rest of tonight...northwest winds 5 to 10 knots becoming north.
a chance of showers late this evening. waves 1 to 3 feet. 
.monday...north winds 5 to 10 knots. waves 1 foot or less. 
.monday night...north winds 10 knots or less becoming west. waves
1 foot or less. 
.tuesday...west winds 10 knots or less. waves 1 foot or less. 
.tuesday night...west winds 5 to 10 knots. waves 1 foot or less. 
.wednesday...west winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.thursday...west winds 5 to 15 knots becoming southwest. waves
2 feet or less. 
.friday...southwest winds 5 to 15 knots becoming west. a chance
of showers friday night. 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
1004 pm edt sun may 31 2026


slz022-024-010900-
saint lawrence river from cape vincent to saint regis
1004 pm edt sun may 31 2026

.overnight...northeast winds 10 knots or less becoming
north. mainly clear. 
.monday...northeast winds 10 knots or less. sunny.
.monday night...northeast winds less than 10 knots. mainly clear.
.tuesday...light and variable winds becoming north 5 to 10 knots.
mostly sunny. 
.tuesday night...northwest winds less than 10 knots. partly
cloudy. 
.wednesday...light and variable winds. mainly clear. 
.thursday...southwest winds 5 to 10 knots. partly cloudy. 
.friday...southwest winds 10 knots or less. a chance of showers
friday night. 

$$