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(1/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 11/15/2025 4:02 PM America/New_York.
Valid through 11/15/2025 11:00 PM America/New_York.
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glflo
expires:202511160400;;469377
open lake forecast for lake ontario
national weather service buffalo ny
402 pm est sat nov 15 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 29.2 inch low will deepen to 29.0 inches as it tracks
from georgian bay to central new england by sunday morning while
also sending an attendant cold front across the lake tonight. this
low will deepen further to 28.8 inches over northern new england
sunday before moving to the canadian maritimes monday, then north to
labrador tuesday. a 30.3 inch high will then build from the upper
great lakes tuesday to the lower great lakes wednesday, then to new
england thursday.
loz063-160400-
lake ontario open waters from hamlin beach to sodus bay-
402 pm est sat nov 15 2025
...gale warning in effect from midnight est tonight through late
sunday night...
.tonight...south winds 15 to 20 knots becoming west and
increasing to 35 knot gales after midnight. showers this evening.
a chance of showers late. waves 1 to 3 feet building to 11 to
15 feet. waves occasionally around 19 feet.
.sunday...west gales to 35 knots becoming northwest. rain showers
likely in the morning, then a chance of rain and snow showers in
the afternoon. waves 11 to 15 feet. waves occasionally around
19 feet.
.sunday night...northwest gales to 35 knots diminishing to
30 knots. a chance of snow showers. waves 10 to 14 feet. waves
occasionally around 18 feet.
.monday...northwest winds to 30 knots becoming west. a chance of
snow showers in the morning. waves 8 to 12 feet. waves
occasionally around 15 feet.
.monday night...northwest winds to 30 knots diminishing to 15 to
20 knots. a chance of snow showers. waves 8 to 11 feet subsiding
to 5 to 9 feet. waves occasionally around 14 feet.
.tuesday...west winds 15 to 20 knots becoming northwest 5 to
15 knots. waves 4 to 7 feet subsiding to 1 to 2 feet. waves
occasionally around 9 feet.
.wednesday...north winds 5 to 10 knots becoming east. waves
around 1 foot.
.thursday...southeast winds 5 to 15 knots. rain showers likely
thursday night. waves 1 to 2 feet.
winds and waves higher in and near thunderstorms.
$$
(2/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 11/15/2025 4:02 PM America/New_York.
Valid through 11/15/2025 11:00 PM America/New_York.
fzus61 kbuf 152102
glflo
expires:202511160400;;469378
open lake forecast for lake ontario
national weather service buffalo ny
402 pm est sat nov 15 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 29.2 inch low will deepen to 29.0 inches as it tracks
from georgian bay to central new england by sunday morning while
also sending an attendant cold front across the lake tonight. this
low will deepen further to 28.8 inches over northern new england
sunday before moving to the canadian maritimes monday, then north to
labrador tuesday. a 30.3 inch high will then build from the upper
great lakes tuesday to the lower great lakes wednesday, then to new
england thursday.
loz064-065-160400-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 pm est sat nov 15 2025
...gale warning in effect from midnight est tonight through late
sunday night...
.tonight...south winds 15 to 20 knots becoming west and
increasing to 35 knot gales after midnight. showers this evening,
then a chance of showers after midnight. waves 3 to 6 feet
building to 11 to 15 feet. waves occasionally around 19 feet.
.sunday...west gales to 35 knots becoming northwest. rain showers
in the morning, then rain and snow showers likely early in the
afternoon. snow showers likely late. waves 11 to 15 feet. waves
occasionally around 19 feet.
.sunday night...northwest gales to 35 knots. snow showers likely
in the evening, then a chance of snow showers overnight. waves
10 to 14 feet. waves occasionally around 18 feet.
.monday...northwest winds to 30 knots. a chance of snow showers.
waves 8 to 12 feet. waves occasionally around 15 feet.
.monday night...northwest winds to 30 knots. a chance of snow
showers overnight. waves 7 to 11 feet subsiding to 5 to 8 feet.
waves occasionally around 14 feet.
.tuesday...northwest winds 15 to 20 knots diminishing to 5 to
15 knots. a chance of rain and snow showers. waves 4 to 7 feet
subsiding to 1 to 2 feet. waves occasionally around 9 feet.
.wednesday...northwest winds 5 to 10 knots becoming east. waves
1 foot or less.
.thursday...southeast winds 5 to 15 knots. rain showers likely
thursday night. waves 2 feet or less.
winds and waves higher in and near thunderstorms.
$$
(3/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 11/15/2025 4:02 PM America/New_York.
Valid through 11/15/2025 11:00 PM America/New_York.
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expires:202511160400;;469374
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est sat nov 15 2025
slz022-160400-
saint lawrence river from cape vincent to ogdensburg-
402 pm est sat nov 15 2025
.tonight...southeast winds 10 to 15 knots becoming west 15 to
20 knots. rain showers.
.sunday...west winds 15 to 20 knots. rain and snow showers in the
morning, then snow showers likely in the afternoon.
.sunday night...west winds 10 to 15 knots. a chance of snow
showers.
.monday...west winds 10 to 15 knots. mostly cloudy.
.monday night...west winds 5 to 10 knots. mostly cloudy.
.tuesday...west winds 5 to 10 knots becoming light and variable.
partly cloudy.
.wednesday...northwest winds less than 10 knots. partly to mostly
cloudy.
.thursday...east winds 10 knots or less becoming southeast. a
chance of rain showers thursday night.
$$
(4/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 11/15/2025 4:02 PM America/New_York.
Valid through 11/15/2025 11:00 PM America/New_York.
fzus61 kbuf 152102
glfsl
expires:202511160400;;469375
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est sat nov 15 2025
slz024-160400-
saint lawrence river from ogdensburg to saint regis-
402 pm est sat nov 15 2025
.tonight...east winds 5 to 15 knots becoming west. rain showers
through the early overnight, then rain and snow showers likely
late.
.sunday...west winds 15 to 20 knots. snow and rain showers early,
then snow showers from late morning on.
.sunday night...west winds 15 to 20 knots. snow showers likely in
the evening, then a chance of snow showers overnight.
.monday...west winds 10 to 15 knots. a chance of snow showers in
the morning.
.monday night...west winds 5 to 15 knots. mostly cloudy.
.tuesday...west winds 10 knots or less. mostly cloudy.
.wednesday...west winds less than 10 knots. mostly cloudy.
.thursday...northeast winds less than 10 knots. a chance of snow
showers thursday night.
$$
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