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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est wed nov 19 2025

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 over the lower great lakes will slide 
out across new england thursday. a 29.5 inch surface low near james 
bay will swing a cold front east across the lake friday, with a 30.1 
inch high then building over the ohio valley and lower great lakes 
saturday. a 29.5 inch low will then move from northern ontario to 
james bay sunday, while pushing its warm front across the lake 
saturday night, followed by its trailing cold front sunday. a 30.2 
inch high is then forecast to build across the ohio valley monday.


loz062-201000-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm est wed nov 19 2025

.overnight...northeast winds less than 10 knots becoming
southeast. waves 1 foot or less. 
.thursday...southeast winds less than 10 knots. waves 1 foot or
less. 
.thursday night...south winds 10 knots or less becoming southwest
10 to 15 knots. waves 2 feet or less. 
.friday...southwest winds 10 to 15 knots becoming west. a chance
of rain. waves 1 to 3 feet. 
.friday night...west winds 10 to 15 knots becoming northwest.
waves 1 to 3 feet. 
.saturday...north winds 5 to 15 knots becoming southwest. waves
2 feet or less. 
.sunday...southwest winds 10 to 15 knots becoming west. waves
1 to 3 feet. 
.monday...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet. 

$$

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glflo 
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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est wed nov 19 2025

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 over the lower great lakes will slide 
out across new england thursday. a 29.5 inch surface low near james 
bay will swing a cold front east across the lake friday, with a 30.1 
inch high then building over the ohio valley and lower great lakes 
saturday. a 29.5 inch low will then move from northern ontario to 
james bay sunday, while pushing its warm front across the lake 
saturday night, followed by its trailing cold front sunday. a 30.2 
inch high is then forecast to build across the ohio valley monday.


loz063-201000-
lake ontario open waters from hamlin beach to sodus bay-
1002 pm est wed nov 19 2025

.overnight...south winds less than 10 knots. waves 1 foot
or less. 
.thursday...southeast winds 10 knots or less. waves 1 foot or
less. 
.thursday night...south winds 5 to 15 knots becoming southwest.
waves 2 feet or less. 
.friday...southwest winds 10 to 15 knots becoming west. a chance
of rain. waves 1 to 3 feet. 
.friday night...west winds 10 to 15 knots becoming northwest.
waves 2 to 3 feet. 
.saturday...north winds 5 to 15 knots becoming southwest. waves
1 to 3 feet. 
.sunday...southwest winds 10 to 15 knots becoming west 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.monday...west winds 15 to 20 knots. a chance of showers. waves
3 to 5 feet subsiding to 2 to 4 feet. 

$$

fzus61 kbuf 200302
glflo 
expires:202511201000;;169896

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est wed nov 19 2025

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 over the lower great lakes will slide 
out across new england thursday. a 29.5 inch surface low near james 
bay will swing a cold front east across the lake friday, with a 30.1 
inch high then building over the ohio valley and lower great lakes 
saturday. a 29.5 inch low will then move from northern ontario to 
james bay sunday, while pushing its warm front across the lake 
saturday night, followed by its trailing cold front sunday. a 30.2 
inch high is then forecast to build across the ohio valley monday.


loz064-065-201000-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 pm est wed nov 19 2025

.overnight...east winds less than 10 knots becoming
southeast. waves 1 foot or less. 
.thursday...southeast winds 10 knots or less. waves 1 foot or
less. 
.thursday night...southeast winds 5 to 15 knots becoming south. a
chance of rain overnight. waves 1 to 3 feet. 
.friday...south winds 15 to 20 knots becoming southwest. rain
likely. waves 2 to 4 feet. 
.friday night...west winds 10 to 15 knots becoming northwest. a
chance of rain in the evening, then a chance of rain showers
overnight. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.saturday...north winds 5 to 15 knots becoming southwest. waves
1 to 3 feet subsiding to 1 foot or less. 
.sunday...southwest winds 10 to 15 knots becoming west 15 to
20 knots. a chance of rain showers sunday night. waves 1 to
3 feet building to 2 to 4 feet. 
.monday...west winds 15 to 20 knots. a chance of rain showers.
waves 3 to 5 feet subsiding 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
1002 pm est wed nov 19 2025


slz022-201000-
saint lawrence river from cape vincent to ogdensburg-
1002 pm est wed nov 19 2025

.overnight...light and variable winds. areas of fog. 
.thursday...light and variable winds. partly to mostly sunny. 
.thursday night...light and variable winds becoming south 5 to
10 knots. a chance of rain overnight. 
.friday...south winds 5 to 10 knots becoming southwest. rain.
.friday night...west winds 10 knots or less becoming northwest. a
chance of rain in the evening. 
.saturday...northwest winds less than 10 knots. partly to mostly
cloudy. 
.sunday...south winds 5 to 10 knots becoming southwest. a chance
of rain showers sunday night. 
.monday...southwest winds 10 knots or less becoming west. a
chance of rain showers. 

$$