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open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sat oct 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 30.5 inch high will settle over the northern mid 
atlantic states sunday through monday before drifting off the 
eastern seaboard tuesday. a 29.5 inch low is then forecast to move 
very slowly from the upper mississippi valley tuesday to the upper 
great lakes by wednesday, and then into western quebec by thursday 
and friday.


loz063>065-010300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sat oct 31 2026

.tonight...west winds 5 to 15 knots becoming southwest less than
10 knots. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots becoming southeast. waves
1 foot or less. 
.sunday night...southeast winds 5 to 15 knots becoming southwest.
waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots becoming south. waves
2 feet or less. 
.monday night...southeast winds 10 knots or less becoming south.
waves 1 foot or less. 
.tuesday...south winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers during the day. waves 1 to 3 feet. 
.wednesday...south winds 15 to 20 knots. a chance of showers.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.thursday...south winds 10 to 15 knots becoming southeast. a
chance of showers. waves 1 to 3 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt sat oct 31 2026


slz022-024-010300-
saint lawrence river from cape vincent to saint regis
403 pm edt sat oct 31 2026

.tonight...west winds less than 10 knots. mainly clear. 
.sunday...southwest winds 10 knots or less. mostly sunny. 
.sunday night...southwest winds 5 to 10 knots. mostly cloudy. 
.monday...southwest winds 5 to 10 knots. partly to mostly sunny. 
.monday night...southwest winds less than 10 knots. mostly
cloudy. 
.tuesday...south winds 10 knots or less. a chance of showers. 
.wednesday...south winds 5 to 15 knots becoming southwest. a
chance of showers wednesday night. 
.thursday...south winds 10 knots or less becoming east. a chance
of showers during the day, then showers likely thursday night. 

$$