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open lake forecast for lake ontario
national weather service buffalo ny
1125 am 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 30.4 inch high will settle over the lower great 
lakes today. this high will drift into the mid atlantic states 
sunday through monday, then drift off the east coast by tuesday. a 
29.6 inch low is then forecast to move from the upper mississippi 
valley wednesday to the upper great lakes thursday.


loz063>065-312100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1125 am edt sat oct 31 2026

.this afternoon...west winds 5 to 15 knots. waves 1 foot or less. 
.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. 
.tuesday...south winds 5 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 1 to 3 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt sat oct 31 2026


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

.this afternoon...west winds 10 knots or less. sunny.
.tonight...southwest winds less than 10 knots. becoming mainly
clear. 
.sunday...southwest winds 10 knots or less. mostly sunny. 
.sunday night...southwest winds 5 to 10 knots. mostly cloudy. 
.monday...southwest winds 10 knots or less becoming south. mostly
cloudy. 
.tuesday...south winds 10 knots or less. a chance of showers. 
.wednesday...south winds 10 to 15 knots. a chance of showers. 

$$