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(1/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/6/2025 4:02 PM America/New_York.
Valid through 12/6/2025 11:00 PM America/New_York.
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glflo
expires:202512070400;;123470
open lake forecast for lake ontario
national weather service buffalo ny
402 pm est sat dec 6 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 cold front will cross the lake tonight, while its
associated 29.2 inch low remains stationary near hudson bay. a weak
30.0 inch surface low and trough will cross the lake on sunday
afternoon and evening. another 30.4 inch high will move across the
region monday through monday night, before moving off the east coast
tuesday. a 29.5 inch low will move across the upper great lakes
tuesday, then a stronger low averaging 29.3 inches will approach the
region tuesday night and potentially move northwest of the lake
wednesday. a 29.9 inch high is expected to move into the great lakes
region thursday.
loz063-070400-
lake ontario open waters from hamlin beach to sodus bay-
402 pm est sat dec 6 2025
.tonight...west winds 15 to 25 knots becoming north and
diminishing to 10 to 15 knots. a chance of snow showers late this
evening. waves 5 to 8 feet subsiding to 2 to 4 feet. waves
occasionally around 10 feet.
.sunday...east winds 5 to 15 knots. a chance of snow showers in
the morning, then snow showers in the afternoon. waves 1 to
3 feet.
.sunday night...north winds 15 to 20 knots. snow showers in the
evening, then a chance of snow showers overnight. waves 1 to
3 feet building to 3 to 5 feet.
.monday...north winds 15 to 20 knots becoming northwest and
diminishing to 5 to 10 knots. a chance of snow showers in the
morning. waves 3 to 5 feet subsiding to 1 to 3 feet.
.monday night...west winds 5 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet.
.tuesday...south winds 15 to 25 knots becoming southwest. snow
showers likely during the day, then rain with a chance of snow
tuesday night. waves 3 to 6 feet.
.wednesday...south winds 15 to 25 knots becoming west. rain with
a chance of snow during the day, then rain and snow showers
likely wednesday night. waves 3 to 6 feet building to 5 to
8 feet. waves occasionally around 10 feet.
.thursday...west winds 15 to 25 knots. a chance of snow showers.
waves 4 to 7 feet subsiding to 3 to 6 feet. waves occasionally
around 9 feet.
$$
(2/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/6/2025 4:02 PM America/New_York.
Valid through 12/6/2025 11:00 PM America/New_York.
fzus61 kbuf 062102
glflo
expires:202512070400;;123471
open lake forecast for lake ontario
national weather service buffalo ny
402 pm est sat dec 6 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 cold front will cross the lake tonight, while its
associated 29.2 inch low remains stationary near hudson bay. a weak
30.0 inch surface low and trough will cross the lake on sunday
afternoon and evening. another 30.4 inch high will move across the
region monday through monday night, before moving off the east coast
tuesday. a 29.5 inch low will move across the upper great lakes
tuesday, then a stronger low averaging 29.3 inches will approach the
region tuesday night and potentially move northwest of the lake
wednesday. a 29.9 inch high is expected to move into the great lakes
region thursday.
loz064-065-070400-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 pm est sat dec 6 2025
.tonight...west winds 15 to 25 knots becoming northeast and
diminishing to 10 to 15 knots. a chance of snow showers early,
then a chance of snow and rain showers late this evening. a
chance of snow showers after midnight. waves 5 to 8 feet
subsiding to 2 to 4 feet. waves occasionally around 10 feet.
.sunday...northeast winds 5 to 15 knots becoming east. a chance
of snow showers in the morning, then snow showers in the
afternoon. waves 1 to 3 feet.
.sunday night...northeast winds 15 to 20 knots becoming north.
snow showers. waves 1 to 3 feet building to 3 to 5 feet.
.monday...north winds 15 to 20 knots becoming northwest and
diminishing to 5 to 10 knots. a chance of snow showers in the
morning. waves 3 to 5 feet subsiding to 1 to 3 feet.
.monday night...west winds 5 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet.
.tuesday...south winds to 30 knots becoming southwest 15 to
25 knots. snow showers likely during the day, then rain and snow
tuesday night. waves 3 to 6 feet building to 5 to 9 feet. waves
occasionally around 11 feet.
.wednesday...south winds 20 to 25 knots becoming west. rain and
snow during the day, then rain and snow showers wednesday night.
waves 3 to 6 feet building to 5 to 8 feet. waves occasionally
around 10 feet.
.thursday...northwest winds 15 to 25 knots. snow showers likely.
waves 5 to 8 feet subsiding to 3 to 6 feet. waves occasionally
around 10 feet.
$$
(3/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/6/2025 4:02 PM America/New_York.
Valid through 12/6/2025 11:00 PM America/New_York.
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expires:202512070400;;123467
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est sat dec 6 2025
slz022-070400-
saint lawrence river from cape vincent to ogdensburg-
402 pm est sat dec 6 2025
.tonight...west winds 10 knots or less becoming northeast. a
chance of snow showers early.
.sunday...northeast winds less than 10 knots. a chance of snow
showers in the morning, then snow showers in the afternoon.
.sunday night...northeast winds 5 to 10 knots becoming northwest.
snow showers.
.monday...northwest winds 10 knots or less becoming southwest.
sunny.
.monday night...light and variable winds becoming south 5 to
10 knots. partly cloudy in the evening, then becoming mostly
cloudy.
.tuesday...south winds 5 to 15 knots becoming southwest. snow
showers likely during the day, then snow tuesday night.
.wednesday...south winds 5 to 15 knots becoming west. rain and
snow during the day, then snow and rain showers wednesday night.
.thursday...northwest winds 5 to 10 knots. snow showers likely
during the day, then a chance of snow showers thursday night.
$$
(4/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/6/2025 4:02 PM America/New_York.
Valid through 12/6/2025 11:00 PM America/New_York.
fzus61 kbuf 062102
glfsl
expires:202512070400;;123468
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est sat dec 6 2025
slz024-070400-
saint lawrence river from ogdensburg to saint regis-
402 pm est sat dec 6 2025
.tonight...southwest winds 5 to 15 knots becoming north less than
10 knots. partly to mostly cloudy.
.sunday...light and variable winds. snow showers likely in the
afternoon.
.sunday night...northeast winds 10 knots or less becoming
northwest. snow showers.
.monday...northwest winds 10 knots or less becoming southwest.
sunny.
.monday night...southwest winds less than 10 knots becoming
south. partly to mostly cloudy.
.tuesday...south winds 5 to 10 knots. snow showers likely during
the day, then snow tuesday night.
.wednesday...south winds 5 to 10 knots becoming west. snow and
rain during the day, then snow showers wednesday night.
.thursday...west winds 5 to 10 knots. snow showers likely during
the day, then a chance of snow showers thursday night.
$$
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