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Latest Great Lakes Marine Forecast by KBUF
Issued 12/12/2025 10:02 AM America/New_York.
Valid through 12/12/2025 5:00 PM America/New_York.
fzus61 kbuf 121502
glflo
expires:202512122200;;453951
open lake forecast for lake ontario
national weather service buffalo ny
1002 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.
loz063-122200-
lake ontario open waters from hamlin beach to sodus bay-
1002 am est fri dec 12 2025
.this afternoon...west winds 20 to 25 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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Latest Great Lakes Marine Forecast by KBUF
Issued 12/12/2025 10:02 AM America/New_York.
Valid through 12/12/2025 5:00 PM America/New_York.
fzus61 kbuf 121502
glflo
expires:202512122200;;453952
open lake forecast for lake ontario
national weather service buffalo ny
1002 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.
loz064-065-122200-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 am est fri dec 12 2025
.this afternoon...west winds 20 to 25 knots. a chance of snow
showers, then 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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Latest Great Lakes Marine Forecast by KBUF
Issued 12/12/2025 10:02 AM America/New_York.
Valid through 12/12/2025 5:00 PM America/New_York.
fzus61 kbuf 121502
glfsl
expires:202512122200;;453947
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est fri dec 12 2025
slz022-122200-
saint lawrence river from cape vincent to ogdensburg-
1002 am est fri dec 12 2025
.rest of today...west winds 10 to 15 knots. 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.
$$
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Latest Great Lakes Marine Forecast by KBUF
Issued 12/12/2025 10:02 AM America/New_York.
Valid through 12/12/2025 5:00 PM America/New_York.
fzus61 kbuf 121502
glfsl
expires:202512122200;;453948
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est fri dec 12 2025
slz024-122200-
saint lawrence river from ogdensburg to saint regis-
1002 am est fri dec 12 2025
.rest of today...west winds 5 to 10 knots. partly sunny late this
morning, then becoming mostly cloudy.
.tonight...west winds 10 knots or less becoming south. a chance
of snow showers late.
.saturday...south winds 5 to 15 knots becoming southwest. lake
effect snow in the morning, then lake effect snow showers likely
in the afternoon.
.saturday night...southwest winds 5 to 15 knots diminishing to
less than 10 knots. lake effect snow showers likely in the
evening.
.sunday...west winds 5 to 10 knots. mostly cloudy.
.monday...west winds 5 to 10 knots becoming southwest. a chance
of snow showers during the day, then snow showers likely monday
night.
.tuesday...southwest winds 5 to 15 knots becoming south 15 to
20 knots. a chance of snow showers tuesday night.
$$
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