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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est sun nov 9 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 29.6 inch low will move off the southern new england 
coast tonight, then strengthen further to 29.1 inches while moving 
north across quebec tuesday. another 29.2 inch low will move east 
across hudson bay wednesday. a 30.1 inch high will then build from 
the canadian prairies thursday to northwest ontario province friday 
while strengthening to 30.3 inches.


loz062-100400-
lake ontario open waters from the niagara river to hamlin beach-
402 pm est sun nov 9 2025

.tonight...northeast winds 15 to 25 knots becoming north. snow
this evening, then a chance of snow after midnight. waves 5 to
9 feet subsiding to 4 to 6 feet. waves occasionally around
11 feet. 
.monday...north winds 15 to 20 knots becoming northwest. a chance
of snow showers. waves 3 to 5 feet. 
.monday night...northwest winds 15 to 25 knots. snow showers
likely. waves 3 to 6 feet. 
.tuesday...northwest winds to 30 knots becoming west. a chance of
snow showers in the morning, then a chance of rain and snow
showers in the afternoon. waves 5 to 8 feet building to 7 to
10 feet. waves occasionally around 13 feet. 
.tuesday night...west winds to 30 knots becoming southwest. rain
showers. waves 6 to 10 feet. waves occasionally around 13 feet. 
.wednesday...west gales to 35 knots. showers. waves 8 to 12 feet
subsiding to 7 to 10 feet. waves occasionally around 15 feet. 
.thursday...west winds to 30 knots diminishing to 15 to 20 knots.
showers likely. waves 7 to 11 feet subsiding to 3 to 6 feet.
waves occasionally around 14 feet. 
.friday...northwest winds 15 to 20 knots becoming northeast 10 to
15 knots. a chance of rain showers during the day. waves 2 to
4 feet subsiding to 1 to 3 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est sun nov 9 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 29.6 inch low will move off the southern new england 
coast tonight, then strengthen further to 29.1 inches while moving 
north across quebec tuesday. another 29.2 inch low will move east 
across hudson bay wednesday. a 30.1 inch high will then build from 
the canadian prairies thursday to northwest ontario province friday 
while strengthening to 30.3 inches.


loz063>065-100400-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm est sun nov 9 2025

.tonight...north winds to 30 knots diminishing to 15 to 20 knots.
rain and snow early, then snow likely with a chance of rain late
this evening. snow and rain likely after midnight. waves 6 to
9 feet subsiding to 3 to 6 feet. waves occasionally around
11 feet. 
.monday...north winds 15 to 20 knots becoming northwest. a chance
of snow showers in the morning, then snow showers likely in the
afternoon. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.monday night...northwest winds 15 to 25 knots. snow showers.
waves 2 to 4 feet building to 4 to 7 feet. waves occasionally
around 9 feet. 
.tuesday...northwest winds to 30 knots becoming west. snow
showers in the morning, then rain and snow showers likely in the
afternoon. waves 5 to 8 feet building to 9 to 12 feet. waves
occasionally around 15 feet. 
.tuesday night...west winds to 30 knots becoming southwest. rain
showers. waves 8 to 12 feet. waves occasionally around 15 feet. 
.wednesday...west gales to 35 knots diminishing to 30 knots. rain
showers. waves 8 to 11 feet building to 10 to 14 feet. waves
occasionally around 18 feet. 
.thursday...west winds to 30 knots diminishing to 15 to 20 knots.
rain showers. waves 8 to 12 feet subsiding to 5 to 8 feet. waves
occasionally around 15 feet. 
.friday...northwest winds 15 to 20 knots becoming north 10 to
15 knots. a chance of rain showers during the day. waves 3 to
6 feet subsiding 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 pm est sun nov 9 2025


slz022-100400-
saint lawrence river from cape vincent to ogdensburg-
402 pm est sun nov 9 2025

.tonight...northeast winds 15 to 20 knots becoming northwest 5 to
15 knots. snow, sleet and freezing rain early, then a chance of
freezing rain, snow and sleet late this evening. snow and
freezing rain likely after midnight. 
.monday...northwest winds 5 to 10 knots becoming west. a chance
of snow showers. 
.monday night...west winds 5 to 10 knots. a chance of snow
showers. 
.tuesday...west winds 5 to 15 knots. a chance of snow showers. 
.tuesday night...southwest winds 10 to 15 knots increasing to
15 to 20 knots. snow and rain showers. 
.wednesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. rain and snow showers during the day, then rain showers
with a chance of snow showers wednesday night. 
.thursday...west winds 10 knots or less. rain showers likely with
a chance of snow showers. 
.friday...northwest winds 10 knots or less becoming north. a
chance of rain and snow showers during the day. 

$$