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open lake forecast for lake ontario
national weather service buffalo ny
644 am 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.


loz062-101615-
lake ontario open waters from the niagara river to hamlin beach-
644 am est wed dec 10 2025

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

$$

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open lake forecast for lake ontario
national weather service buffalo ny
644 am 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.


loz063-101615-
lake ontario open waters from hamlin beach to sodus bay-
644 am est wed dec 10 2025

...gale watch in effect from late tonight through thursday
evening...

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

$$

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open lake forecast for lake ontario
national weather service buffalo ny
644 am 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.


loz064-065-101615-
lake ontario open waters from sodus bay to the saint lawrence
river-
644 am est wed dec 10 2025

...gale watch in effect from late tonight through thursday
evening...

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

$$

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


slz022-101600-
saint lawrence river from cape vincent to ogdensburg-
402 am est wed dec 10 2025

.today...south winds 5 to 10 knots. snow through early afternoon,
then snow and rain late. 
.tonight...southwest winds 5 to 15 knots becoming west. snow and
rain in the evening, then snow showers likely after midnight. 
.thursday...west winds 15 to 20 knots. snow showers likely. 
.thursday night...west winds 15 to 20 knots diminishing to 5 to
15 knots. snow showers likely in the evening, then a chance of
snow showers overnight. 
.friday...west winds 10 knots or less becoming south. a chance of
snow showers friday night. 
.saturday...south winds 5 to 10 knots becoming southwest. snow
showers likely. 
.sunday...west winds 5 to 10 knots becoming northwest. snow
showers likely during the day, then a chance of snow showers
sunday night. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
255 am est wed dec 10 2025

for waters beyond five nautical miles of shore on lake erie

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 strong cold front poised to sweep eastward across lake erie
today as low pressure of 29.20 inches moves northeastward across 
southern ontario. a trough averaging 29.90 inches will linger 
over the lower great lakes through thursday with a ridge averaging
30.00 inches briefly building east over the lake on friday. a 
cold front will track eastward across the region late friday into 
saturday and high pressure 30.40 inches will begin to build from 
the west toward the end of the weekend.


lez061-168-169-101515-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
255 am est wed dec 10 2025

...gale warning in effect through this evening...

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

$$