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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est sun nov 16 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 28.9 low over maine will make its way across the 
canadian maritimes through monday, before withdrawing northward 
across labrador on tuesday. a 30.3 inch high will then build from 
the upper great lakes tuesday to the lower great lakes wednesday, 
then to new england thursday. a 29.6 inch low over central ontario 
will then make its way to quebec friday, while pushing its trailing 
cold front across the lake.


loz063-170400-
lake ontario open waters from hamlin beach to sodus bay-
402 pm est sun nov 16 2025

...gale warning in effect until 1 am est monday...

.tonight...northwest gales to 35 knots diminishing to 30 knots. a
chance of snow and rain showers early. waves 10 to 15 feet
subsiding to 8 to 12 feet. waves occasionally around 19 feet. 
.monday...northwest winds to 30 knots becoming west. a chance of
snow showers. waves 7 to 11 feet. waves occasionally around
14 feet. 
.monday night...northwest winds 15 to 25 knots. a chance of rain
and snow showers in the evening, then a chance of rain showers
overnight. waves 5 to 9 feet subsiding to 4 to 7 feet. waves
occasionally around 11 feet. 
.tuesday...northwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.tuesday night...west winds 5 to 10 knots becoming northwest.
waves 1 to 3 feet. 
.wednesday...north winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.thursday...southeast winds 10 knots or less increasing to 10 to
15 knots. rain showers likely thursday night. waves 2 feet or
less. 
.friday...south winds 15 to 20 knots becoming west. showers.
waves 2 to 4 feet building to 3 to 6 feet. 

$$

fzus61 kbuf 162102
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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est sun nov 16 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 28.9 low over maine will make its way across the 
canadian maritimes through monday, before withdrawing northward 
across labrador on tuesday. a 30.3 inch high will then build from 
the upper great lakes tuesday to the lower great lakes wednesday, 
then to new england thursday. a 29.6 inch low over central ontario 
will then make its way to quebec friday, while pushing its trailing 
cold front across the lake.


loz064-065-170400-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 pm est sun nov 16 2025

...gale warning in effect until 1 am est monday...

.tonight...northwest gales to 35 knots. a chance of snow showers.
waves 10 to 15 feet subsiding to 9 to 12 feet. waves occasionally
around 19 feet. 
.monday...northwest winds to 30 knots. a chance of snow showers
early. waves 7 to 11 feet. waves occasionally around 14 feet. 
.monday night...northwest winds 15 to 25 knots. waves 6 to
10 feet subsiding to 5 to 8 feet. waves occasionally around
13 feet. 
.tuesday...northwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.tuesday night...west winds 5 to 10 knots becoming northwest.
waves 1 to 3 feet subsiding to 1 foot or less. 
.wednesday...northwest winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.thursday...southeast winds 5 to 10 knots increasing to 15 to
20 knots. rain showers likely thursday night. waves 1 foot or
less building to 1 to 3 feet. 
.friday...south winds 15 to 25 knots becoming west. showers.
waves 2 to 4 feet building to 3 to 6 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est sun nov 16 2025


slz022-170400-
saint lawrence river from cape vincent to ogdensburg-
402 pm est sun nov 16 2025

.tonight...west winds 15 to 20 knots becoming northwest 10 to
15 knots. a chance of snow showers. 
.monday...northwest winds 10 to 15 knots becoming west. mostly
cloudy. 
.monday night...west winds 5 to 15 knots. mostly cloudy. 
.tuesday...west winds 5 to 10 knots. mostly sunny. 
.tuesday night...southwest winds less than 10 knots. partly
cloudy. 
.wednesday...light and variable winds. partly to mostly cloudy. 
.thursday...light and variable winds. rain showers likely
thursday night. 
.friday...southeast winds 5 to 10 knots becoming west. rain
showers. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est sun nov 16 2025


slz024-170400-
saint lawrence river from ogdensburg to saint regis-
402 pm est sun nov 16 2025

.tonight...west winds 15 to 20 knots diminishing to 10 to
15 knots. snow showers likely this evening, then a chance of snow
showers after midnight. 
.monday...west winds 10 to 15 knots. a chance of snow showers
early. 
.monday night...west winds 15 to 20 knots diminishing to 10 to
15 knots. mostly cloudy. 
.tuesday...west winds 5 to 15 knots. partly sunny. 
.tuesday night...west winds 5 to 10 knots becoming light and
variable. partly to mostly cloudy. 
.wednesday...light and variable winds. partly to mostly cloudy. 
.thursday...light and variable winds. rain showers likely with a
chance of snow showers thursday night. 
.friday...southeast winds 10 knots or less becoming southwest.
rain showers. 

$$