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open lake forecast for lake ontario
national weather service buffalo ny
402 am est fri dec 12 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 move into the gulf of saint 
lawrence today before moving into the north atlantic by saturday. a 
30.2 inch high will build from the upper ohio valley today to off 
the mid atlantic coast saturday. meanwhile, a 29.6 inch low will 
move from just north of the soo tonight to southern quebec by 
saturday night while weakening to 29.9 inches, and will drag an 
attendant cold front across the lake on saturday. a strong 30.8 inch 
high over the mid mississippi valley sunday will then settle across 
the southeast states monday and tuesday while weakening to 30.3 
inches.


loz062-121600-
lake ontario open waters from the niagara river to hamlin beach-
402 am est fri dec 12 2025

.today...west winds 15 to 25 knots. waves 5 to 8 feet. waves
occasionally around 10 feet. 
.tonight...west winds 15 to 20 knots becoming southwest. a chance
of snow showers late in the evening. lake effect snow showers
after midnight. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.saturday...southwest winds 15 to 25 knots becoming west to
30 knots. lake effect snow showers likely in the morning, then a
chance of snow showers in the afternoon. waves 3 to 5 feet
building to 8 to 11 feet. waves occasionally around 14 feet. 
.saturday night...west winds 15 to 25 knots. lake effect snow
showers likely overnight. waves 6 to 10 feet subsiding to 5 to
7 feet. waves occasionally around 13 feet. 
.sunday...west winds 15 to 20 knots becoming northwest. lake
effect snow showers likely during the day, then a chance of snow
showers sunday night. waves 4 to 7 feet subsiding to 2 to 4 feet.
waves occasionally around 9 feet. 
.monday...west winds 15 to 20 knots increasing to 30 knots. snow
showers likely. waves 2 to 4 feet building to 7 to 10 feet. waves
occasionally around 13 feet. 
.tuesday...west winds 15 to 20 knots becoming southwest and
increasing to 30 knots. waves 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 fri dec 12 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 move into the gulf of saint 
lawrence today before moving into the north atlantic by saturday. a 
30.2 inch high will build from the upper ohio valley today to off 
the mid atlantic coast saturday. meanwhile, a 29.6 inch low will 
move from just north of the soo tonight to southern quebec by 
saturday night while weakening to 29.9 inches, and will drag an 
attendant cold front across the lake on saturday. a strong 30.8 inch 
high over the mid mississippi valley sunday will then settle across 
the southeast states monday and tuesday while weakening to 30.3 
inches.


loz063-121600-
lake ontario open waters from hamlin beach to sodus bay-
402 am est fri dec 12 2025

.today...west winds to 30 knots. a chance of snow showers. waves
5 to 9 feet. waves occasionally around 11 feet. 
.tonight...west winds 15 to 25 knots becoming southwest. a chance
of snow showers early. a chance of snow showers after midnight,
then lake effect snow showers likely late. waves 4 to 7 feet
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 
.saturday...southwest winds 15 to 20 knots becoming west and
increasing to 30 knots. lake effect snow showers likely. waves
3 to 5 feet building to 10 to 13 feet. waves occasionally around
16 feet. 
.saturday night...west winds to 30 knots diminishing to 15 to
20 knots. a chance of snow showers in the evening, then lake
effect snow overnight. waves 8 to 12 feet subsiding to 5 to
9 feet. waves occasionally around 15 feet. 
.sunday...west winds 15 to 20 knots becoming northwest. lake
effect snow during the day, then snow showers likely sunday
night. waves 5 to 8 feet subsiding to 3 to 5 feet. waves
occasionally around 10 feet. 
.monday...northwest winds 15 to 25 knots becoming west. snow
showers likely. waves 2 to 4 feet building to 6 to 10 feet. waves
occasionally around 13 feet. 
.tuesday...west winds 15 to 25 knots becoming southwest. a chance
of snow showers during the day. waves 7 to 10 feet subsiding to
3 to 5 feet. waves occasionally around 13 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am est fri dec 12 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 move into the gulf of saint 
lawrence today before moving into the north atlantic by saturday. a 
30.2 inch high will build from the upper ohio valley today to off 
the mid atlantic coast saturday. meanwhile, a 29.6 inch low will 
move from just north of the soo tonight to southern quebec by 
saturday night while weakening to 29.9 inches, and will drag an 
attendant cold front across the lake on saturday. a strong 30.8 inch 
high over the mid mississippi valley sunday will then settle across 
the southeast states monday and tuesday while weakening to 30.3 
inches.


loz064-065-121600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est fri dec 12 2025

.today...west winds to 30 knots. snow showers likely early, then
a chance of snow showers. lake effect snow showers likely late.
waves 6 to 10 feet subsiding to 5 to 8 feet. waves occasionally
around 13 feet. 
.tonight...west winds 15 to 25 knots becoming southwest. lake
effect snow showers early, then a chance of snow showers from
late evening on. waves 5 to 8 feet subsiding to 3 to 6 feet.
waves occasionally around 10 feet. 
.saturday...south winds 15 to 20 knots becoming west and
increasing to 30 knots. lake effect snow. waves 3 to 6 feet
building to 10 to 13 feet. waves occasionally around 16 feet. 
.saturday night...west winds to 30 knots diminishing to 15 to
20 knots. lake effect snow. waves 10 to 13 feet subsiding to 6 to
9 feet. waves occasionally around 16 feet. 
.sunday...northwest winds 15 to 25 knots. lake effect snow during
the day, then snow showers likely sunday night. waves 5 to 8 feet
subsiding to 3 to 6 feet. waves occasionally around 10 feet. 
.monday...northwest winds 15 to 25 knots becoming west. snow
showers. waves 2 to 4 feet building to 8 to 11 feet. waves
occasionally around 14 feet. 
.tuesday...west winds 15 to 25 knots becoming south to 30 knots.
snow showers likely during the day. waves 7 to 10 feet subsiding
to 3 to 6 feet. waves occasionally around 13 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est fri dec 12 2025


slz022-121600-
saint lawrence river from cape vincent to ogdensburg-
402 am est fri dec 12 2025

.today...west winds 15 to 20 knots diminishing to 10 to 15 knots.
mostly cloudy through early afternoon, then becoming partly
sunny. 
.tonight...west winds 10 knots or less becoming south. a chance
of snow showers late in the evening. lake effect snow showers
likely after midnight. 
.saturday...south winds 10 to 15 knots becoming southwest. lake
effect snow. 
.saturday night...west winds 5 to 15 knots diminishing to less
than 10 knots. lake effect snow showers likely in the evening,
then a chance of snow showers overnight. 
.sunday...northwest winds 5 to 10 knots. a chance of snow showers
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. 
.tuesday...southwest winds 10 knots or less becoming south 10 to
15 knots. a chance of snow showers during the day. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
920 am est fri dec 12 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 ridge averaging 30.00 inches will continue to build east over 
the great lakes today before departing to the east tonight. a 
cold front will move east across lake erie saturday morning
followed by a trough averaging 30.20 inches lingering over the
lake into sunday. high pressure 30.70 inches will gradually build
into the ohio valley and southern great lakes regions sunday and 
monday. this high will weaken to 30.40 inches as it moves towards 
the carolinas on tuesday.


lez061-168-169-122130-
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-
920 am est fri dec 12 2025

.this afternoon...west winds 5 to 15 knots. waves 1 to 3 feet. 
.tonight...southwest winds 10 to 15 knots increasing to 30 knots.
a slight chance of snow in the evening, then a chance of snow
after midnight. snow late. waves 1 to 3 feet building to 5 to
8 feet. waves occasionally around 10 feet. 
.saturday...west winds to 30 knots. snow. waves 6 to 10 feet.
waves occasionally around 13 feet. 
.saturday night...west winds 15 to 25 knots. snow. waves 5 to
8 feet. waves occasionally around 10 feet. 
.sunday...northwest winds to 30 knots diminishing to 15 to
20 knots. snow. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.monday...west winds 15 to 25 knots. snow. waves 3 to 6 feet
building to 8 to 12 feet. waves occasionally around 15 feet. 
.tuesday...southwest winds 15 to 20 knots increasing to 30 knots.
waves 5 to 8 feet building to 6 to 9 feet. waves occasionally
around 11 feet. 

$$