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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm est sat nov 15 2025


slz022-161000-
saint lawrence river from cape vincent to ogdensburg-
1002 pm est sat nov 15 2025

.overnight...southwest winds 10 to 15 knots becoming west
15 to 20 knots. rain showers. 
.sunday...west winds 15 to 20 knots. rain and snow showers in the
morning, then snow showers likely in the afternoon. 
.sunday night...west winds 10 to 15 knots. a chance of snow
showers. 
.monday...west winds 10 to 15 knots. mostly cloudy. 
.monday night...west winds 5 to 10 knots. mostly cloudy. 
.tuesday...west winds 5 to 10 knots becoming light and variable.
partly cloudy. 
.wednesday...northwest winds less than 10 knots. partly to mostly
cloudy. 
.thursday...east winds 10 knots or less becoming southeast. a
chance of rain showers thursday night. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm est sat nov 15 2025


slz024-161000-
saint lawrence river from ogdensburg to saint regis-
1002 pm est sat nov 15 2025

.overnight...east winds 5 to 15 knots becoming west. rain
showers, then rain and snow showers likely late. 
.sunday...west winds 15 to 20 knots. snow and rain showers early,
then snow showers from late morning on. 
.sunday night...west winds 15 to 20 knots. snow showers likely in
the evening, then a chance of snow showers overnight. 
.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. mostly cloudy. 
.wednesday...west winds less than 10 knots. mostly cloudy. 
.thursday...northeast winds less than 10 knots. a chance of snow
showers thursday night. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est sat nov 15 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.


loz064-065-161000-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 pm est sat nov 15 2025

...gale warning in effect through late sunday night...

.rest of tonight...west winds to 30 knots increasing to 35 knot
gales after midnight. a chance of showers. waves 3 to 6 feet
building to 11 to 15 feet. waves occasionally around 19 feet. 
.sunday...west gales to 35 knots becoming northwest. rain showers
in the morning, then rain and snow showers likely early in the
afternoon. snow showers likely late. waves 11 to 15 feet. waves
occasionally around 19 feet. 
.sunday night...northwest gales to 35 knots. snow showers likely
in the evening, then a chance of snow showers overnight. waves
10 to 14 feet. waves occasionally around 18 feet. 
.monday...northwest winds to 30 knots. a chance of snow showers.
waves 8 to 12 feet. waves occasionally around 15 feet. 
.monday night...northwest winds to 30 knots. a chance of snow
showers overnight. waves 7 to 11 feet subsiding to 5 to 8 feet.
waves occasionally around 14 feet. 
.tuesday...northwest winds 15 to 20 knots diminishing to 5 to
15 knots. a chance of rain and snow showers. waves 4 to 7 feet
subsiding to 1 to 2 feet. waves occasionally around 9 feet. 
.wednesday...northwest winds 5 to 10 knots becoming east. waves
1 foot or less. 
.thursday...southeast winds 5 to 15 knots. rain showers likely
thursday night. waves 2 feet or less. 

$$