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open lake forecast for lake ontario
national weather service buffalo ny
1003 am edt sat sep 26 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...an expansive 30.3 inch high will persist across ontario 
and southern quebec through tonight before drifting to eastern 
quebec and labrador sunday. meanwhile, low pressure off the east 
coast will deepen to 29.2 inches today east of the delmarva. this 
low will move to near the jersey shore and long island tonight 
through sunday, then meander northeast along the new england coast 
monday through tuesday while gradually filling to 29.8 inches.


loz063>065-262100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 am edt sat sep 26 2026

.this afternoon...northeast winds 15 to 20 knots becoming north.
waves 3 to 5 feet subsiding to 2 to 4 feet. 
.tonight...north winds 15 to 25 knots becoming northeast. waves
2 to 4 feet building to 4 to 7 feet. waves occasionally around
9 feet. 
.sunday...northeast winds to 30 knots diminishing to 15 to
25 knots. a chance of showers in the morning, then showers likely
in the afternoon. waves 5 to 8 feet. waves occasionally around
10 feet. 
.sunday night...northeast winds 15 to 25 knots diminishing to
10 to 15 knots. showers likely in the evening. waves 4 to 7 feet
subsiding to 2 to 4 feet. waves occasionally around 9 feet. 
.monday...northeast winds 5 to 15 knots becoming north. waves
1 to 3 feet subsiding to 1 foot or less. 
.tuesday...north winds 10 knots or less becoming south. waves
1 foot or less. 
.wednesday...south winds 5 to 15 knots becoming southwest. 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 sat sep 26 2026


slz022-024-262100-
saint lawrence river from cape vincent to saint regis
1003 am edt sat sep 26 2026

.this afternoon...northeast winds 10 to 15 knots. mostly sunny. 
.tonight...northeast winds 10 to 15 knots increasing to 15 to
20 knots. mostly cloudy. 
.sunday...northeast winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers. 
.sunday night...northeast winds 5 to 15 knots. a chance of
showers in the evening. 
.monday...northeast winds 10 knots or less. mostly cloudy. 
.tuesday...light and variable winds. partly to mostly cloudy. 
.wednesday...south winds 10 knots or less becoming southwest.
mostly cloudy. 

$$