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open lake forecast for lake ontario
national weather service buffalo ny
1238 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.


loz063-102215-
lake ontario open waters from hamlin beach to sodus bay-
1238 pm est wed dec 10 2025

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

.this afternoon...southwest winds 20 to 25 knots. rain. waves 3 to
6 feet. 
.tonight...west winds to 30 knots becoming northwest and
increasing to 35 knot gales. rain early, then snow and rain
likely late in the evening. lake effect snow showers likely after
midnight. waves 4 to 7 feet building to 10 to 13 feet. waves
occasionally around 16 feet. 
.thursday...northwest gales to 35 knots becoming west. lake
effect snow showers likely. 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 15 to 25 knots becoming northwest. 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. 

$$

fzus61 kbuf 101738
glflo 
expires:202512102215;;345118

open lake forecast for lake ontario
national weather service buffalo ny
1238 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.


loz064-065-102215-
lake ontario open waters from sodus bay to the saint lawrence
river-
1238 pm est wed dec 10 2025

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

.this afternoon...south winds to 30 knots becoming southwest. rain
and snow early, then rain late. 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 snow
and rain likely late in the evening. snow showers likely after
midnight. waves 5 to 9 feet building to 10 to 13 feet. waves
occasionally around 16 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 10 to 14 feet. waves occasionally around
18 feet. 
.thursday night...northwest gales to 35 knots diminishing to
30 knots. a chance of snow showers. waves 10 to 14 feet subsiding
to 5 to 8 feet. waves occasionally around 18 feet. 
.friday...west winds 15 to 25 knots becoming southwest and
diminishing to 10 to 15 knots. a chance of snow showers during
the day, then snow showers likely friday night. waves 4 to 7 feet
subsiding to 2 to 4 feet. waves occasionally around 9 feet. 
.saturday...south 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. 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
1002 am est wed dec 10 2025


slz022-102200-
saint lawrence river from cape vincent to ogdensburg-
1002 am est wed dec 10 2025

.rest of today...southeast winds 5 to 10 knots becoming south.
snow late this morning, then snow and rain this afternoon. 
.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. 

$$

fzus61 kbuf 101502
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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est wed dec 10 2025


slz024-102200-
saint lawrence river from ogdensburg to saint regis-
1002 am est wed dec 10 2025

.rest of today...east winds 10 knots or less. snow.
.tonight...east winds 5 to 15 knots becoming west 15 to 20 knots.
snow 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. snow showers likely
in the evening, then a chance of snow showers overnight. 
.friday...west winds 5 to 15 knots becoming southwest less than
10 knots. partly to mostly cloudy. 
.saturday...south winds 10 knots or less becoming southwest. snow
showers likely. 
.sunday...west winds 5 to 10 knots. a chance of snow showers
during the day. 

$$