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open lake forecast for lake ontario
national weather service buffalo ny
402 am 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 29.7 inch surface low will deepen to 29.5 inches as it 
tracks from the ohio valley to new england today and monday, then 
will strengthen further while moving north across quebec tuesday. 
another 29.2 inch low will move north of the great lakes region 
wednesday. west-northwest flow will persist across the eastern great 
lakes region thursday, while a 30.2 inch high moves from the 
northern plains to the southern ohio valley.


loz062-091600-
lake ontario open waters from the niagara river to hamlin beach-
402 am est sun nov 9 2025

.today...northeast winds to 30 knots. rain early, then rain and
snow from late morning on. waves 5 to 8 feet building to 6 to
9 feet. waves occasionally around 11 feet. 
.tonight...northeast winds 15 to 25 knots becoming north. rain
and snow early, then snow showers likely late in the evening. a
chance of snow showers after midnight. waves 5 to 8 feet. waves
occasionally around 10 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 20 knots. a chance of snow
showers in the evening, then snow showers likely overnight. waves
3 to 6 feet. 
.tuesday...northwest winds to 30 knots becoming southwest. snow
showers likely with a chance of rain showers during the day, then
rain showers tuesday night. waves 5 to 8 feet building to 7 to
10 feet. waves occasionally around 13 feet. 
.wednesday...southwest gales to 35 knots becoming west and
diminishing to 30 knots. showers. waves 10 to 14 feet subsiding
to 7 to 10 feet. waves occasionally around 18 feet. 
.thursday...west winds to 30 knots becoming northwest and
diminishing to 15 to 20 knots. showers likely. waves 7 to 10 feet
subsiding to 3 to 6 feet. waves occasionally around 13 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am 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 29.7 inch surface low will deepen to 29.5 inches as it 
tracks from the ohio valley to new england today and monday, then 
will strengthen further while moving north across quebec tuesday. 
another 29.2 inch low will move north of the great lakes region 
wednesday. west-northwest flow will persist across the eastern great 
lakes region thursday, while a 30.2 inch high moves from the 
northern plains to the southern ohio valley.


loz063>065-091600-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am est sun nov 9 2025

.today...northeast winds 15 to 25 knots increasing to 30 knots.
rain likely early, then rain with snow likely late this morning.
rain this afternoon. waves 3 to 6 feet building to 5 to 9 feet.
waves occasionally around 11 feet. 
.tonight...northeast winds to 30 knots becoming north and
diminishing to 15 to 20 knots. rain early, then rain showers
likely with a chance of snow showers late in the evening. a
chance of snow showers 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. snow
showers likely. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.monday night...northwest winds 15 to 25 knots. snow showers.
waves 3 to 6 feet. 
.tuesday...northwest winds to 30 knots becoming southwest. snow
showers with rain showers likely during the day, then rain
showers tuesday night. waves 7 to 10 feet building to 9 to
13 feet. waves occasionally around 16 feet. 
.wednesday...southwest gales to 35 knots becoming west and
diminishing to 30 knots. rain showers. waves 9 to 12 feet
building to 10 to 15 feet. waves occasionally around 19 feet. 
.thursday...west winds to 30 knots becoming northwest and
diminishing to 15 to 20 knots. rain showers. waves 8 to 12 feet
subsiding to 5 to 8 feet. waves occasionally around 15 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 9 2025


slz022-091600-
saint lawrence river from cape vincent to ogdensburg-
402 am est sun nov 9 2025

.today...northeast winds 5 to 15 knots. snow.
.tonight...northeast winds 5 to 15 knots becoming northwest. snow
with possible freezing rain and sleet likely in the evening, then
snow showers likely with a chance of freezing rain after
midnight. 
.monday...northwest winds 5 to 10 knots. a chance of snow
showers. 
.monday night...northwest winds 5 to 10 knots becoming west. a
chance of snow showers. 
.tuesday...west winds 5 to 15 knots becoming southwest. a chance
of snow showers during the day, then snow showers tuesday night. 
.wednesday...south winds 5 to 15 knots becoming west. rain and
snow showers. 
.thursday...west winds 5 to 10 knots. rain and snow showers
likely during the day, then a chance of snow and rain showers
likely thursday night. 

$$