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(1/5)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/30/2025 4:02 AM America/New_York.
Valid through 12/30/2025 11:00 AM America/New_York.
fzus61 kbuf 300902
glflo
expires:202512301600;;484702
open lake forecast for lake ontario
national weather service buffalo ny
402 am est tue dec 30 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...low pressure averaging 29.0 inches over georgian bay
will move to northern new england and southern quebec today, then to
the canadian maritimes by tuesday while deepening to 28.8 inches. a
trough averaging 29.7 inches, will drop southward across the lake
thursday and linger through friday.
loz062-301600-
lake ontario open waters from the niagara river to hamlin beach-
402 am est tue dec 30 2025
...gale warning in effect until 7 am est this morning...
.today...west winds to 30 knots increasing to 35 knot gales. lake
effect snow showers likely. waves 10 to 14 feet. waves
occasionally around 18 feet.
.tonight...west gales to 35 knots diminishing to 30 knots. lake
effect snow showers. waves 10 to 14 feet subsiding to 6 to
10 feet. waves occasionally around 18 feet.
.wednesday...west winds 15 to 25 knots. lake effect snow showers.
waves 5 to 8 feet. waves occasionally around 10 feet.
.wednesday night...northwest winds 20 to 25 knots becoming west.
lake effect snow showers. waves 5 to 8 feet. waves occasionally
around 10 feet.
.thursday...west winds 20 to 25 knots. snow showers likely. waves
5 to 8 feet. waves occasionally around 10 feet.
.friday...west winds 15 to 25 knots. snow showers likely during
the day. waves 5 to 8 feet subsiding to 3 to 6 feet. waves
occasionally around 10 feet.
.saturday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of snow showers. waves 3 to 5 feet subsiding
to 1 to 3 feet.
$$
(2/5)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/30/2025 4:02 AM America/New_York.
Valid through 12/30/2025 11:00 AM America/New_York.
fzus61 kbuf 300902
glflo
expires:202512301600;;484703
open lake forecast for lake ontario
national weather service buffalo ny
402 am est tue dec 30 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...low pressure averaging 29.0 inches over georgian bay
will move to northern new england and southern quebec today, then to
the canadian maritimes by tuesday while deepening to 28.8 inches. a
trough averaging 29.7 inches, will drop southward across the lake
thursday and linger through friday.
loz063-301600-
lake ontario open waters from hamlin beach to sodus bay-
402 am est tue dec 30 2025
...gale warning in effect through this evening...
.today...northwest gales to 35 knots becoming west to 40 knots.
lake effect snow showers. waves 11 to 15 feet building to 13 to
18 feet. waves occasionally around 23 feet.
.tonight...west gales to 40 knots diminishing to 30 knots. lake
effect snow showers. waves 14 to 18 feet subsiding to 9 to
12 feet. waves occasionally around 23 feet.
.wednesday...west winds 15 to 25 knots. lake effect snow showers.
waves 7 to 10 feet subsiding to 5 to 8 feet. waves occasionally
around 13 feet.
.wednesday night...northwest winds 20 to 25 knots. lake effect
snow showers. waves 5 to 8 feet. waves occasionally around
10 feet.
.thursday...west winds 20 to 25 knots. lake effect snow showers.
waves 5 to 9 feet. waves occasionally around 11 feet.
.friday...west winds to 30 knots becoming northwest and
diminishing to 15 to 20 knots. lake effect snow showers during
the day, then a chance of snow showers friday night. waves 5 to
9 feet. waves occasionally around 11 feet.
.saturday...northwest winds 15 to 20 knots becoming north 10 to
15 knots. a chance of snow showers. waves 3 to 5 feet subsiding
to 2 to 4 feet.
$$
(3/5)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/30/2025 4:02 AM America/New_York.
Valid through 12/30/2025 11:00 AM America/New_York.
fzus61 kbuf 300902
glflo
expires:202512301600;;484704
open lake forecast for lake ontario
national weather service buffalo ny
402 am est tue dec 30 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...low pressure averaging 29.0 inches over georgian bay
will move to northern new england and southern quebec today, then to
the canadian maritimes by tuesday while deepening to 28.8 inches. a
trough averaging 29.7 inches, will drop southward across the lake
thursday and linger through friday.
loz064-301600-
lake ontario open waters from sodus bay to mexico bay-
402 am est tue dec 30 2025
...gale warning in effect through this evening...
.today...west gales to 35 knots increasing to 40 knots. lake
effect snow showers. waves 11 to 15 feet building to 15 to
19 feet. waves occasionally around 24 feet.
.tonight...west gales to 40 knots diminishing to 30 knots. lake
effect snow showers early, then a chance of snow showers late in
the evening. lake effect snow showers after midnight. waves 15 to
19 feet subsiding to 9 to 13 feet. waves occasionally around
24 feet.
.wednesday...west winds 15 to 25 knots. lake effect snow showers.
waves 7 to 10 feet subsiding to 5 to 8 feet. waves occasionally
around 13 feet.
.wednesday night...northwest winds 20 to 25 knots. lake effect
snow showers. waves 5 to 8 feet. waves occasionally around
10 feet.
.thursday...northwest winds 20 to 25 knots becoming west. lake
effect snow showers. waves 5 to 9 feet. waves occasionally around
11 feet.
.friday...west winds 15 to 25 knots becoming northwest. lake
effect snow showers. waves 5 to 9 feet. waves occasionally around
11 feet.
.saturday...northwest winds 15 to 20 knots becoming north 10 to
15 knots. a chance of snow showers. waves 3 to 5 feet subsiding
to 1 to 3 feet.
$$
(4/5)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/30/2025 4:02 AM America/New_York.
Valid through 12/30/2025 11:00 AM America/New_York.
fzus61 kbuf 300902
glflo
expires:202512301600;;484705
open lake forecast for lake ontario
national weather service buffalo ny
402 am est tue dec 30 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...low pressure averaging 29.0 inches over georgian bay
will move to northern new england and southern quebec today, then to
the canadian maritimes by tuesday while deepening to 28.8 inches. a
trough averaging 29.7 inches, will drop southward across the lake
thursday and linger through friday.
loz065-301600-
lake ontario open waters from mexico bay to the saint lawrence
river-
402 am est tue dec 30 2025
...gale warning in effect through this evening...
.today...west gales to 35 knots increasing to 40 knots. snow
showers likely through early afternoon, then a chance of snow
showers late. waves 10 to 14 feet building to 13 to 17 feet.
waves occasionally around 22 feet.
.tonight...west gales to 40 knots diminishing to 30 knots. a
chance of snow showers early. a chance of snow showers after
midnight. waves 12 to 16 feet subsiding to 7 to 10 feet. waves
occasionally around 20 feet.
.wednesday...northwest winds 15 to 20 knots. lake effect snow
showers. waves 5 to 8 feet subsiding to 3 to 6 feet. waves
occasionally around 10 feet.
.wednesday night...northwest winds 15 to 25 knots. lake effect
snow showers in the evening, then snow showers likely overnight.
waves 3 to 6 feet.
.thursday...northwest winds 15 to 20 knots becoming west. lake
effect snow showers. waves 3 to 6 feet building to 5 to 8 feet.
waves occasionally around 10 feet.
.friday...west winds 15 to 25 knots becoming northwest. lake
effect snow showers. waves 5 to 9 feet subsiding to 4 to 7 feet.
waves occasionally around 11 feet.
.saturday...northwest winds 10 to 15 knots becoming north. a
chance of snow showers during the day. waves 2 to 4 feet
subsiding to 1 to 3 feet.
$$
(5/5)
Latest Great Lakes Marine Forecast by KBUF
Issued 12/30/2025 4:02 AM America/New_York.
Valid through 12/30/2025 11:00 AM America/New_York.
fzus61 kbuf 300902
glfsl
expires:202512301600;;484701
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est tue dec 30 2025
slz022-024-301600-
saint lawrence river from cape vincent to saint regis
402 am est tue dec 30 2025
...small craft advisory in effect through late tonight...
.today...west winds 15 to 25 knots. a chance of snow showers.
.tonight...west winds 15 to 25 knots diminishing to 10 to
15 knots. a chance of snow showers through the early overnight.
.wednesday...west winds 5 to 10 knots. a chance of snow showers
in the afternoon.
.wednesday night...west winds less than 10 knots. a chance of
snow showers.
.thursday...west winds 10 knots or less becoming southwest.
partly to mostly cloudy.
.friday...southwest winds 5 to 10 knots becoming northwest. a
chance of snow showers.
.saturday...northwest winds less than 10 knots. partly to mostly
cloudy.
$$
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