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open lake forecast for lake ontario
national weather service buffalo ny
402 am 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 29.2 inch low will deepen to 29.0 inches as it tracks 
from georgian bay to central new england by sunday morning while 
also sending an attendant cold front across the lake tonight. this 
low will deepen further to 28.8 inches over northern new england 
sunday before moving to the canadian maritimes monday, then north to 
labrador 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.


loz064-065-161600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est sun nov 16 2025

...gale warning in effect through late tonight...

.today...northwest gales to 35 knots. a chance of rain showers
this morning. a chance of rain showers late. waves 12 to 16 feet.
waves occasionally around 20 feet. 
.tonight...northwest gales to 35 knots. a chance of snow showers.
waves 10 to 15 feet subsiding to 8 to 11 feet. waves occasionally
around 19 feet. 
.monday...northwest winds to 30 knots becoming west. a chance of
snow showers in the morning. waves 7 to 11 feet. waves
occasionally around 14 feet. 
.monday night...northwest winds to 30 knots diminishing to 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 north 5 to
15 knots. waves 4 to 7 feet subsiding to 2 feet or less. waves
occasionally around 9 feet. 
.wednesday...east 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. a chance of rain showers during the day, then rain
showers likely thursday night. waves 1 foot or less building to
1 to 3 feet. 

$$

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


slz022-161600-
saint lawrence river from cape vincent to ogdensburg-
402 am est sun nov 16 2025

.today...west winds 15 to 20 knots. a chance of rain and snow
showers early, then snow and rain showers likely late this
morning. a chance of snow showers this afternoon. 
.tonight...west winds 15 to 20 knots becoming northwest 10 to
15 knots. snow showers likely in the evening, then a chance of
snow showers after midnight. 
.monday...northwest winds 10 to 15 knots becoming west. a chance
of snow showers in the morning. 
.monday night...west winds 5 to 15 knots. mostly cloudy. 
.tuesday...west winds 5 to 10 knots becoming light and variable.
partly cloudy. 
.wednesday...light and variable winds. partly cloudy, then
becoming mostly cloudy. 
.thursday...northeast winds 10 knots or less becoming southeast.
rain showers likely thursday night. 

$$

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


slz024-161600-
saint lawrence river from ogdensburg to saint regis-
402 am est sun nov 16 2025

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

$$