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open lake forecast for lake ontario...corrected
national weather service buffalo ny
1239 am est thu nov 6 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...low pressure will make its way across new england 
overnight while further strengthening to 29.2 inches. in its 
wake, a 30.2 inch high will build from the ohio valley to the mid-
atlantic states thursday, then will slide out to sea through 
friday while allowing a 29.4 inch low to track from the upper 
great lakes to quebec and push its trailing cold front across the 
lake friday night. another 29.5 inch surface low will then track 
from the ohio valley to new england sunday and monday.


loz063>065-061000-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1239 am est thu nov 6 2025

.overnight...northwest winds 20 to 25 knots. a chance of
rain showers. waves 11 to 15 feet subsiding to 9 to 12 feet.
waves occasionally around 19 feet. 
.thursday...northwest winds 15 to 25 knots becoming west. waves
7 to 10 feet subsiding to 3 to 6 feet. waves occasionally around
13 feet. 
.thursday night...west winds 15 to 20 knots becoming south. waves
3 to 5 feet subsiding to 1 to 3 feet. 
.friday...south winds 15 to 25 knots increasing to 30 knots. a
chance of showers in the morning, then showers in the afternoon.
waves 3 to 5 feet building to 5 to 8 feet. waves occasionally
around 10 feet. 
.friday night...southwest winds to 30 knots becoming west 15 to
25 knots. showers. waves 4 to 7 feet subsiding to 3 to 6 feet.
waves occasionally around 9 feet. 
.saturday...west winds 15 to 20 knots becoming northeast. rain
showers likely. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.sunday...east winds 15 to 25 knots becoming west. rain showers
during the day, then rain showers with snow showers likely sunday
night. waves 3 to 5 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 
.monday...west winds 15 to 25 knots increasing to 30 knots. snow
and rain showers likely during the day, then snow showers monday
night. waves 3 to 6 feet building to 5 to 8 feet. waves
occasionally around 10 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 5 2025


slz022-061000-
saint lawrence river from cape vincent to ogdensburg-
1002 pm est wed nov 5 2025

.rest of tonight...northwest winds 10 to 15 knots. rain showers,
then a chance of rain showers late. 
.thursday...northwest winds 5 to 15 knots becoming west. partly
sunny early, then becoming mostly sunny. 
.thursday night...west winds 10 knots or less becoming south.
partly cloudy in the evening, then becoming mostly cloudy. 
.friday...south winds 5 to 15 knots. a chance of rain showers in
the morning, then rain showers in the afternoon. 
.friday night...south winds 5 to 15 knots becoming southwest.
showers.
.saturday...west winds 10 knots or less becoming northeast. rain
showers during the day, then a chance of rain and snow showers
saturday night. 
.sunday...northeast winds 5 to 10 knots becoming west. rain and
snow showers. 
.monday...west winds 5 to 10 knots. a chance of snow showers. 

$$

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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 5 2025


slz024-061000-
saint lawrence river from ogdensburg to saint regis-
1002 pm est wed nov 5 2025

.rest of tonight...northwest winds 10 to 15 knots. rain and snow
showers late this evening, then rain showers likely after
midnight. a chance of rain and snow showers late. 
.thursday...northwest winds 10 to 15 knots becoming west. mostly
cloudy early, then clearing. 
.thursday night...west winds 10 knots or less becoming south.
partly cloudy in the evening, then becoming mostly cloudy. 
.friday...south winds 10 knots or less. a chance of rain and snow
showers in the morning, then rain showers in the afternoon. 
.friday night...south winds 5 to 15 knots becoming southwest.
showers.
.saturday...west winds 10 knots or less becoming northeast. rain
showers during the day, then a chance of rain and snow showers
saturday night. 
.sunday...northeast winds 5 to 10 knots becoming west. rain and
snow showers. 
.monday...west winds 5 to 10 knots. a chance of snow showers. 

$$