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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt sat oct 3 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 30.3 inch high will build east across the lower great 
lakes today, before sliding northeast into northern new england 
tonight. a 29.7 inch low over northwest ontario sunday will deepen 
to 29.4 inches as it slides just south of james bay into central 
quebec sunday night, while sending a pair of cold fronts across the 
lake. a 30.2 inch high over the upper midwest will then build across 
the great lakes monday into tuesday, before sliding into the 
northeast wednesday.


loz062-032100-
lake ontario open waters from the niagara river to hamlin beach-
1003 am edt sat oct 3 2026

.this afternoon...east winds 5 to 10 knots. waves around 1 foot. 
.tonight...east winds 10 to 15 knots becoming southeast. waves
2 feet or less. 
.sunday...southeast winds 10 knots or less becoming southwest.
waves 2 feet or less. 
.sunday night...southwest winds 5 to 15 knots becoming northwest
15 to 20 knots. waves 2 feet or less building to 3 to 5 feet. 
.monday...west winds 15 to 25 knots becoming northwest. waves
3 to 6 feet building to 4 to 7 feet, then subsiding to 3 to
5 feet. waves occasionally around 9 feet. 
.tuesday...northwest winds 5 to 10 knots becoming southwest.
waves 2 feet or less. 
.wednesday...southwest winds 15 to 20 knots diminishing to 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 

$$

fzus61 kbuf 031403
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expires:202610032100;;465483

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt sat oct 3 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 30.3 inch high will build east across the lower great 
lakes today, before sliding northeast into northern new england 
tonight. a 29.7 inch low over northwest ontario sunday will deepen 
to 29.4 inches as it slides just south of james bay into central 
quebec sunday night, while sending a pair of cold fronts across the 
lake. a 30.2 inch high over the upper midwest will then build across 
the great lakes monday into tuesday, before sliding into the 
northeast wednesday.


loz063>065-032100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 am edt sat oct 3 2026

.this afternoon...northeast winds 5 to 10 knots. waves 2 feet or
less. 
.tonight...northeast winds 5 to 15 knots becoming southeast.
waves 2 feet or less. 
.sunday...southeast winds 15 to 20 knots becoming south. waves
1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.sunday night...south winds 15 to 20 knots becoming west. a
chance of showers overnight. waves 1 to 3 feet building to 3 to
5 feet. 
.monday...northwest winds to 30 knots diminishing to 15 to
20 knots. a chance of showers during the day. waves 4 to 7 feet
building to 6 to 9 feet, then subsiding to 4 to 7 feet. waves
occasionally around 11 feet. 
.tuesday...northwest winds 5 to 15 knots becoming southwest.
waves 2 to 4 feet subsiding to 2 feet or less. 
.wednesday...south winds 15 to 20 knots becoming southwest. waves
1 to 3 feet building to 2 to 4 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 3 2026


slz022-024-032100-
saint lawrence river from cape vincent to saint regis
1003 am edt sat oct 3 2026

.this afternoon...north winds less than 10 knots. sunny.
.tonight...northeast winds less than 10 knots becoming east.
mainly clear through the early overnight, then becoming partly
cloudy. 
.sunday...southeast winds 10 knots or less becoming south. mostly
sunny in the morning, then becoming mostly cloudy. 
.sunday night...south winds 5 to 10 knots becoming southwest. a
chance of showers in the evening, then showers likely overnight. 
.monday...west winds 5 to 15 knots. rain showers likely during
the day. 
.tuesday...west winds 10 knots or less becoming southwest. mainly
clear. 
.wednesday...south winds 5 to 15 knots becoming southwest. a
chance of rain showers wednesday night. 

$$