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Latest Great Lakes Marine Forecast by KBUF
Issued 12/16/2025 4:02 AM America/New_York.
Valid through 12/16/2025 11:00 AM America/New_York.
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glflo
expires:202512161600;;670735
open lake forecast for lake ontario
national weather service buffalo ny
402 am est tue dec 16 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 30.4 inch high will drift off the southeast coast
today. a 29.0 inch low over northwest ontario province this
afternoon will move east to northern quebec by wednesday, with a
trailing cold front crossing the lake wednesday. another 29.0 inch
low near lake superior thursday will move to northern quebec by
friday, with a trailing strong cold front crossing the lake early
friday morning. in its wake, a 30.1 inch high will slowly build
across the lake friday night and early saturday, then will drift off
the atlantic coastline later saturday and saturday night, with a
29.5 inch low moving across ontario and quebec and pushing its
attendant cold front across the lake sunday.
loz063-161600-
lake ontario open waters from hamlin beach to sodus bay-
402 am est tue dec 16 2025
...gale warning in effect from late tonight through wednesday
afternoon...
.today...southwest winds 15 to 20 knots. waves 3 to 6 feet
subsiding to 1 to 3 feet.
.tonight...southwest winds 15 to 25 knots increasing to 35 knot
gales after midnight. waves 2 to 4 feet building to 7 to 10 feet.
waves occasionally around 13 feet.
.wednesday...southwest gales to 35 knots becoming west and
diminishing to 30 knots in the afternoon. waves 9 to 13 feet.
waves occasionally around 16 feet.
.wednesday night...west winds 15 to 25 knots becoming south 15 to
20 knots. waves 7 to 10 feet subsiding to 1 to 3 feet. waves
occasionally around 13 feet.
.thursday...south winds 15 to 25 knots becoming southwest to
30 knots. a chance of rain showers during the day, then rain
showers thursday night. waves 3 to 6 feet building to 7 to
10 feet. waves occasionally around 13 feet.
.friday...west gales to 40 knots diminishing to 15 to 20 knots.
rain showers with snow showers likely during the day, then a
chance of snow showers friday night. waves 12 to 16 feet building
to 14 to 18 feet, then subsiding to 5 to 8 feet. waves
occasionally around 23 feet.
.saturday...southwest winds 15 to 25 knots. a chance of snow and
rain showers. waves 2 to 4 feet building to 5 to 8 feet. waves
occasionally around 10 feet.
$$
(2/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/16/2025 4:02 AM America/New_York.
Valid through 12/16/2025 11:00 AM America/New_York.
fzus61 kbuf 160902
glflo
expires:202512161600;;670736
open lake forecast for lake ontario
national weather service buffalo ny
402 am est tue dec 16 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 30.4 inch high will drift off the southeast coast
today. a 29.0 inch low over northwest ontario province this
afternoon will move east to northern quebec by wednesday, with a
trailing cold front crossing the lake wednesday. another 29.0 inch
low near lake superior thursday will move to northern quebec by
friday, with a trailing strong cold front crossing the lake early
friday morning. in its wake, a 30.1 inch high will slowly build
across the lake friday night and early saturday, then will drift off
the atlantic coastline later saturday and saturday night, with a
29.5 inch low moving across ontario and quebec and pushing its
attendant cold front across the lake sunday.
loz064-065-161600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est tue dec 16 2025
...gale warning in effect from late tonight through wednesday
afternoon...
.today...southwest winds 15 to 20 knots becoming south. lake
effect snow showers likely early, then scattered snow showers
late this morning. waves 3 to 6 feet.
.tonight...south winds 15 to 25 knots becoming southwest to
30 knots. waves 3 to 5 feet building to 6 to 9 feet. waves
occasionally around 11 feet.
.wednesday...southwest gales to 35 knots becoming west. a chance
of rain showers. waves 7 to 10 feet building to 9 to 13 feet.
waves occasionally around 16 feet.
.wednesday night...west winds 15 to 25 knots becoming south 15 to
20 knots. waves 8 to 11 feet subsiding to 2 to 4 feet. waves
occasionally around 14 feet.
.thursday...south winds to 30 knots increasing to 35 knot gales.
a chance of rain showers during the day, then rain showers
thursday night. waves 4 to 7 feet building to 8 to 11 feet. waves
occasionally around 14 feet.
.friday...west gales to 40 knots becoming northwest and
diminishing to 15 to 20 knots. snow and rain showers during the
day, then a chance of snow showers friday night. waves 13 to
18 feet subsiding to 6 to 9 feet. waves occasionally around
23 feet.
.saturday...southwest winds 15 to 25 knots increasing to
30 knots. a chance of snow showers during the day, then a chance
of rain and snow showers saturday night. waves 2 to 4 feet
building to 5 to 8 feet. waves occasionally around 10 feet.
$$
(3/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/16/2025 4:02 AM America/New_York.
Valid through 12/16/2025 11:00 AM America/New_York.
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glfsl
expires:202512161600;;670690
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est tue dec 16 2025
slz022-161600-
saint lawrence river from cape vincent to ogdensburg-
402 am est tue dec 16 2025
.today...southwest winds 5 to 15 knots becoming south. scattered
snow showers.
.tonight...south winds 10 to 15 knots becoming southwest 15 to
20 knots. cloudy.
.wednesday...southwest winds 15 to 20 knots. a chance of rain
showers in the morning, then a chance of rain and snow showers in
the afternoon.
.wednesday night...west winds 5 to 15 knots becoming south. a
chance of snow showers in the evening.
.thursday...south winds 15 to 25 knots. a chance of rain showers
during the day, then rain showers thursday night.
.friday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. snow and rain showers during the day, then a chance of
snow showers friday night.
.saturday...southwest winds 5 to 15 knots. a chance of snow
showers during the day, then snow showers likely with a chance of
rain showers saturday night.
$$
(4/4)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/16/2025 4:02 AM America/New_York.
Valid through 12/16/2025 11:00 AM America/New_York.
fzus61 kbuf 160902
glfsl
expires:202512161600;;670691
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est tue dec 16 2025
slz024-161600-
saint lawrence river from ogdensburg to saint regis-
402 am est tue dec 16 2025
.today...southwest winds 5 to 10 knots. mostly cloudy.
.tonight...south winds 10 to 15 knots becoming southwest 15 to
20 knots. mostly cloudy.
.wednesday...southwest winds 15 to 20 knots. a chance of snow and
rain showers.
.wednesday night...west winds 15 to 20 knots becoming south 5 to
15 knots. a chance of snow showers in the evening.
.thursday...south winds 10 to 15 knots increasing to 30 knots. a
chance of rain showers during the day, then rain showers thursday
night.
.friday...southwest winds 15 to 25 knots becoming west. snow and
rain showers during the day, then a chance of snow showers friday
night.
.saturday...west winds 5 to 15 knots becoming southwest. a chance
of snow showers during the day, then snow showers likely saturday
night.
$$
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