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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est wed dec 10 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 cross along the northern shoreline 
of the lake this afternoon before moving northeast of the lake this 
evening, while dragging a cold front across the lake waters. the 
region will then be situated between a 29.1 inch low over the 
canadian maritimes and a 30.1 inch high over the southern plains 
thursday. a 29.9 inch ridge of high pressure is expected to move 
into the great lakes region friday. a 29.8 inch low may move north 
of the lake on saturday, then 30.2 inches will average across the 
lower great lakes region between the departing low to the east and a 
30.7 inch high over the plains sunday.


loz062-111000-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm est wed dec 10 2025

.rest of tonight...northwest winds to 30 knots. a chance of snow
showers after midnight. snow showers likely late. waves 6 to
10 feet building to 8 to 11 feet. waves occasionally around
14 feet. 
.thursday...northwest winds to 30 knots becoming west. a chance
of snow showers. waves 8 to 12 feet. waves occasionally around
15 feet. 
.thursday night...northwest winds to 30 knots becoming west and
diminishing to 15 to 20 knots. waves 7 to 11 feet subsiding to
5 to 8 feet. waves occasionally around 14 feet. 
.friday...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of snow showers in the afternoon. waves 3 to
6 feet subsiding to 2 to 4 feet. 
.friday night...west winds 10 to 15 knots becoming southwest. a
chance of snow showers overnight. waves 1 to 3 feet. 
.saturday...southwest winds 15 to 25 knots becoming west to
30 knots. snow showers likely. waves 3 to 6 feet building to 5 to
9 feet. waves occasionally around 11 feet. 
.sunday...west winds 15 to 20 knots becoming northwest 10 to
15 knots. snow showers likely during the day, then a chance of
snow showers sunday night. waves 4 to 7 feet subsiding to 2 to
4 feet. waves occasionally around 9 feet. 
.monday...west winds 10 to 15 knots increasing to 15 to 25 knots.
a chance of snow showers. waves 1 to 3 feet building to 3 to
6 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est wed dec 10 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 cross along the northern shoreline 
of the lake this afternoon before moving northeast of the lake this 
evening, while dragging a cold front across the lake waters. the 
region will then be situated between a 29.1 inch low over the 
canadian maritimes and a 30.1 inch high over the southern plains 
thursday. a 29.9 inch ridge of high pressure is expected to move 
into the great lakes region friday. a 29.8 inch low may move north 
of the lake on saturday, then 30.2 inches will average across the 
lower great lakes region between the departing low to the east and a 
30.7 inch high over the plains sunday.


loz063-111000-
lake ontario open waters from hamlin beach to sodus bay-
1002 pm est wed dec 10 2025

...gale warning in effect through thursday evening...

.rest of tonight...northwest winds to 30 knots increasing to
35 knot gales. a chance of snow late this evening, then lake
effect snow showers likely after midnight. waves 6 to 9 feet
building to 10 to 14 feet. waves occasionally around 18 feet. 
.thursday...northwest gales to 35 knots becoming west. lake
effect snow showers likely through early afternoon, then a chance
of snow showers late. waves 11 to 15 feet. waves occasionally
around 19 feet. 
.thursday night...northwest gales to 35 knots diminishing to
30 knots. a chance of snow showers. waves 10 to 15 feet subsiding
to 6 to 9 feet. waves occasionally around 19 feet. 
.friday...west winds 15 to 25 knots. a chance of snow showers.
waves 5 to 8 feet subsiding to 3 to 5 feet. waves occasionally
around 10 feet. 
.friday night...west winds 15 to 20 knots becoming southwest
10 to 15 knots. a chance of snow showers. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.saturday...southwest winds 15 to 25 knots becoming west to
30 knots. snow showers likely. waves 3 to 5 feet building to 6 to
10 feet. waves occasionally around 13 feet. 
.sunday...west winds 15 to 25 knots becoming northwest. snow
showers likely during the day, then a chance of snow showers
sunday night. waves 5 to 8 feet subsiding to 3 to 5 feet. waves
occasionally around 10 feet. 
.monday...northwest winds 10 to 15 knots becoming west 15 to
20 knots. a chance of snow showers. waves 2 to 4 feet building to
4 to 7 feet. waves occasionally around 9 feet. 

$$

fzus61 kbuf 110302
glflo 
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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est wed dec 10 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 cross along the northern shoreline 
of the lake this afternoon before moving northeast of the lake this 
evening, while dragging a cold front across the lake waters. the 
region will then be situated between a 29.1 inch low over the 
canadian maritimes and a 30.1 inch high over the southern plains 
thursday. a 29.9 inch ridge of high pressure is expected to move 
into the great lakes region friday. a 29.8 inch low may move north 
of the lake on saturday, then 30.2 inches will average across the 
lower great lakes region between the departing low to the east and a 
30.7 inch high over the plains sunday.


loz064-065-111000-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 pm est wed dec 10 2025

...gale warning in effect through thursday evening...

.rest of tonight...northwest winds to 30 knots increasing to
35 knot gales. snow and rain likely late this evening, then snow
showers likely after midnight. waves 6 to 9 feet building to
10 to 14 feet. waves occasionally around 18 feet. 
.thursday...northwest gales to 35 knots becoming west. snow
showers likely in the morning, then a chance of snow showers in
the afternoon. waves 11 to 16 feet. waves occasionally around
20 feet. 
.thursday night...northwest gales to 35 knots diminishing to
30 knots. a chance of snow showers. waves 12 to 16 feet subsiding
to 7 to 11 feet. waves occasionally around 20 feet. 
.friday...northwest winds 15 to 25 knots becoming west. a chance
of snow showers. waves 5 to 8 feet subsiding to 3 to 6 feet.
waves occasionally around 10 feet. 
.friday night...west winds 15 to 20 knots becoming southwest
10 to 15 knots. lake effect snow showers likely. waves 3 to
5 feet subsiding to 1 to 3 feet. 
.saturday...south winds 15 to 25 knots becoming west. snow
showers. waves 3 to 5 feet building to 6 to 10 feet. waves
occasionally around 13 feet. 
.sunday...west winds 15 to 25 knots becoming northwest. snow
showers. waves 5 to 8 feet subsiding to 3 to 6 feet. waves
occasionally around 10 feet. 
.monday...northwest winds 10 to 15 knots becoming west 15 to
20 knots. a chance of snow showers during the day, then snow
showers likely monday night. waves 2 to 4 feet building to 4 to
7 feet. waves occasionally around 9 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm est wed dec 10 2025


slz022-111000-
saint lawrence river from cape vincent to ogdensburg-
1002 pm est wed dec 10 2025

.rest of tonight...northwest winds 5 to 15 knots becoming west.
snow likely late this evening, then snow showers likely after
midnight. 
.thursday...west winds 15 to 20 knots. a chance of snow showers
in the morning. 
.thursday night...west winds 15 to 20 knots diminishing to 5 to
15 knots. mostly cloudy in the evening, then becoming partly
cloudy. 
.friday...west winds 5 to 10 knots becoming southwest. mostly
sunny. 
.friday night...southwest winds less than 10 knots becoming
south. a chance of snow showers overnight. 
.saturday...south winds 5 to 15 knots becoming southwest. snow
showers. 
.sunday...west winds 5 to 10 knots becoming northwest. snow
showers likely 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. 

$$