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open lake forecast for lake ontario
national weather service buffalo ny
402 am est thu dec 11 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 28.9 inch low will remain over the canadian maritimes 
through friday before moving into the north atlantic by saturday. a 
30.1 inch high will build from the upper ohio valley friday to off 
the mid atlantic coast saturday. a 29.6 inch low will then move from 
just east of lake superior saturday to southern quebec by sunday 
where it will weaken to a 29.9 inch trough. a strong 30.8 inch high 
will then build from the mid mississippi valley sunday to the 
southeast states monday while weakening to 30.5 inches.


loz062-111600-
lake ontario open waters from the niagara river to hamlin beach-
402 am est thu dec 11 2025

.today...northwest winds to 30 knots. lake effect snow showers
likely early, then a chance of snow showers from late morning on.
waves 7 to 10 feet subsiding to 4 to 7 feet. waves occasionally
around 13 feet. 
.tonight...northwest winds 15 to 25 knots. a chance of snow
showers after midnight. waves 4 to 7 feet subsiding to 3 to
6 feet. waves occasionally around 9 feet. 
.friday...west winds 15 to 25 knots. a chance of snow showers in
the afternoon. waves 3 to 6 feet. 
.friday night...west winds 15 to 20 knots becoming southwest
10 to 15 knots. a chance of snow showers overnight. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.saturday...southwest winds 15 to 25 knots becoming west to
30 knots. snow showers. waves 3 to 6 feet building to 5 to
9 feet. waves occasionally around 11 feet. 
.sunday...west winds 15 to 25 knots becoming northwest. snow
showers likely during the day, then a chance of snow showers
sunday night. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.monday...west winds 15 to 20 knots increasing to 30 knots. a
chance of snow showers. waves 2 to 4 feet building to 5 to
8 feet. waves occasionally around 10 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am est thu dec 11 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 28.9 inch low will remain over the canadian maritimes 
through friday before moving into the north atlantic by saturday. a 
30.1 inch high will build from the upper ohio valley friday to off 
the mid atlantic coast saturday. a 29.6 inch low will then move from 
just east of lake superior saturday to southern quebec by sunday 
where it will weaken to a 29.9 inch trough. a strong 30.8 inch high 
will then build from the mid mississippi valley sunday to the 
southeast states monday while weakening to 30.5 inches.


loz063-111600-
lake ontario open waters from hamlin beach to sodus bay-
402 am est thu dec 11 2025

...gale warning in effect through this evening...

.today...northwest winds to 30 knots. lake effect snow showers
likely through early afternoon, then a chance of snow showers
late. waves 10 to 13 feet subsiding to 7 to 11 feet. waves
occasionally around 16 feet. 
.tonight...northwest winds to 30 knots. a chance of snow showers.
waves 6 to 10 feet subsiding to 5 to 8 feet. waves occasionally
around 13 feet. 
.friday...northwest winds 15 to 25 knots becoming west. a chance
of snow showers. waves 5 to 8 feet. waves occasionally around
10 feet. 
.friday night...west winds 15 to 20 knots becoming southwest
10 to 15 knots. a chance of snow showers. waves 3 to 6 feet
subsiding to 2 to 4 feet. 
.saturday...southwest winds 15 to 25 knots becoming west to
30 knots. snow showers. waves 3 to 6 feet building to 7 to
10 feet, then subsiding to 5 to 8 feet. waves occasionally around
13 feet. 
.sunday...west winds 15 to 25 knots becoming northwest. snow
showers during the day, then a chance of snow showers sunday
night. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.monday...northwest winds 15 to 25 knots becoming west. a chance
of snow showers. waves 2 to 4 feet building to 6 to 9 feet. waves
occasionally around 11 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am est thu dec 11 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 28.9 inch low will remain over the canadian maritimes 
through friday before moving into the north atlantic by saturday. a 
30.1 inch high will build from the upper ohio valley friday to off 
the mid atlantic coast saturday. a 29.6 inch low will then move from 
just east of lake superior saturday to southern quebec by sunday 
where it will weaken to a 29.9 inch trough. a strong 30.8 inch high 
will then build from the mid mississippi valley sunday to the 
southeast states monday while weakening to 30.5 inches.


loz064-065-111600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est thu dec 11 2025

...gale warning in effect through this evening...

.today...northwest winds to 30 knots becoming west. a chance of
snow showers through early afternoon. waves 10 to 13 feet
subsiding to 7 to 11 feet. waves occasionally around 16 feet. 
.tonight...northwest winds to 30 knots. waves 7 to 11 feet
subsiding to 5 to 9 feet. waves occasionally around 14 feet. 
.friday...northwest winds 15 to 25 knots becoming west. a chance
of snow showers. waves 5 to 8 feet. waves occasionally around
10 feet. 
.friday night...west winds 15 to 20 knots becoming southwest
10 to 15 knots. a chance of snow showers. waves 3 to 6 feet
subsiding to 1 to 3 feet. 
.saturday...south winds 15 to 25 knots becoming west. snow
showers. waves 3 to 5 feet building to 8 to 11 feet, then
subsiding to 6 to 9 feet. waves occasionally around 14 feet. 
.sunday...west winds 15 to 25 knots becoming northwest. snow
showers during the day, then a chance of snow showers sunday
night. waves 4 to 7 feet subsiding to 3 to 6 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 2 to 4 feet building to 6 to 9 feet. waves
occasionally around 11 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est thu dec 11 2025


slz022-111600-
saint lawrence river from cape vincent to ogdensburg-
402 am est thu dec 11 2025

.today...west winds 10 to 15 knots. a chance of snow showers this
morning. 
.tonight...west winds 5 to 15 knots. partly to mostly cloudy. 
.friday...west winds 5 to 10 knots becoming southwest. mostly
sunny. 
.friday night...southwest winds 10 knots or less becoming south.
a chance of snow showers overnight. 
.saturday...south winds 5 to 10 knots becoming southwest. snow
showers. 
.sunday...west winds 5 to 10 knots becoming northwest. snow
showers likely during the day. 
.monday...west winds 10 knots or less becoming southwest. a
chance of snow showers during the day, then snow showers likely
monday night. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
350 am est thu dec 11 2025

for waters beyond five nautical miles of shore on lake erie

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 trough averaging 29.80 inches will linger across the great lakes
region through this evening. a ridge averaging 30.00 inches will 
briefly build east over the great lakes thursday night into
friday morning before low pressure 29.80 inches moves east across
the ohio valley during the day friday. a cold front will move 
east across lake erie saturday morning with high pressure 30.60 
inches building southeast from the midwest on sunday to the ohio
valley on monday.


lez061-168-169-111530-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
350 am est thu dec 11 2025

.today...west winds to 30 knots. a chance of snow. waves 6 to
9 feet. waves occasionally around 11 feet. 
.tonight...west winds to 30 knots becoming northwest and
diminishing to 10 to 15 knots. a chance of snow. waves 5 to
8 feet subsiding to 3 to 5 feet. waves occasionally around
10 feet. 
.friday...northwest winds 5 to 15 knots becoming west. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.friday night...southwest winds 5 to 15 knots increasing to 15 to
20 knots. a chance of snow overnight. waves 1 to 3 feet building
to 3 to 6 feet. 
.saturday...west winds to 30 knots. snow likely. waves 6 to
10 feet subsiding to 5 to 7 feet. waves occasionally around
13 feet. 
.sunday...west winds to 30 knots becoming northwest and
diminishing to 15 to 20 knots. snow likely during the day, then a
chance of snow sunday night. waves 5 to 9 feet subsiding to 3 to
5 feet. waves occasionally around 11 feet. 
.monday...west winds 15 to 20 knots increasing to 30 knots. a
chance of snow. waves 3 to 6 feet building to 7 to 11 feet. waves
occasionally around 14 feet. 

$$