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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est wed nov 5 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 over the upper great lakes will deepen from 
29.6 inches to 29.4 inches as it passes along or just north of the 
north shore of the lake late this afternoon into this evening, 
before making its way across new england tonight 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.


loz062-061000-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm est wed nov 5 2025

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

.overnight...northwest winds to 30 knots. showers likely,
then a chance of showers late. waves 10 to 13 feet subsiding to
7 to 11 feet. waves occasionally around 16 feet. 
.thursday...northwest winds 15 to 25 knots becoming west. waves
5 to 8 feet subsiding to 3 to 6 feet. waves occasionally around
10 feet. 
.thursday night...west winds 10 to 15 knots becoming south. waves
1 to 3 feet. 
.friday...south winds 15 to 25 knots becoming southwest. a chance
of showers in the morning, then showers in the afternoon. waves
1 to 3 feet building to 3 to 6 feet. 
.friday night...southwest winds 15 to 20 knots becoming west.
showers. waves 3 to 5 feet. 
.saturday...northwest winds 15 to 20 knots becoming northeast. a
chance of showers during the day, then showers likely saturday
night. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.sunday...northeast winds 15 to 25 knots becoming northwest. rain
showers during the day, then rain showers likely with a chance of
snow showers sunday night. waves 3 to 6 feet building to 4 to
7 feet. waves occasionally around 9 feet. 
.monday...northwest winds 15 to 25 knots becoming west. a chance
of snow showers during the day, then snow showers likely monday
night. waves 3 to 6 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est wed nov 5 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 over the upper great lakes will deepen from 
29.6 inches to 29.4 inches as it passes along or just north of the 
north shore of the lake late this afternoon into this evening, 
before making its way across new england tonight 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-
1002 pm est wed nov 5 2025

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

.overnight...northwest winds to 30 knots. rain showers
likely, then a chance of rain showers late. waves 13 to 17 feet
subsiding to 9 to 12 feet. waves occasionally around 22 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 5 to
15 knots. 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 15 to 25 knots becoming west.
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 east 5 to
15 knots. rain showers likely. waves 3 to 6 feet subsiding to
1 to 3 feet. 
.sunday...east winds 15 to 25 knots becoming northwest. 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...northwest winds 15 to 25 knots becoming west. snow and
rain showers likely during the day, then snow showers likely
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. 

$$