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open lake forecast for lake ontario
national weather service buffalo ny
1002 am est wed nov 26 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 29.6 inch low over the western great lakes this 
evening will track toward the central great lakes wednesday, then 
track into eastern ontario through wednesday night while deepening 
to 29.4 inches. a cold front from this low will rush across the lake 
wednesday afternoon. the 29.4 inch surface low will then track well 
north of the lake thursday and friday, as a 30.4 inch surface high 
builds into the mid mississippi valley friday and to the ohio valley 
saturday. another surface low will cut northeastward through the 
central great lakes sunday, deepening from 29.6 inches sunday 
morning to 29.4 inches sunday night over western quebec.


loz063-262200-
lake ontario open waters from hamlin beach to sodus bay-
1002 am est wed nov 26 2025

...gale warning in effect from 4 pm est this afternoon through
friday evening...

.rest of today...south winds 10 to 15 knots becoming southwest
and increasing to 30 knots this afternoon. a chance of showers
late this morning, then showers this afternoon. waves 2 feet or
less building to 5 to 8 feet. waves occasionally around 10 feet. 
.tonight...southwest gales to 35 knots. rain showers likely
early, then lake effect rain and snow showers likely from late
evening on. waves 10 to 14 feet building to 12 to 16 feet. waves
occasionally around 20 feet. 
.thursday...southwest gales to 40 knots becoming west. rain
showers likely with a chance of snow showers in the morning, then
rain and snow showers in the afternoon. waves 14 to 19 feet
building to 15 to 20 feet. waves occasionally around 26 feet. 
.thursday night...west gales to 40 knots diminishing to 35 knots.
rain and snow showers in the evening, then snow showers
overnight. waves 14 to 19 feet subsiding to 11 to 16 feet. waves
occasionally around 24 feet. 
.friday...northwest gales to 35 knots diminishing to 30 knots.
snow showers. waves 10 to 15 feet subsiding to 7 to 10 feet.
waves occasionally around 19 feet. 
.saturday...northwest winds 15 to 25 knots becoming south. snow
showers likely saturday night. waves 4 to 7 feet subsiding to
3 to 5 feet. waves occasionally around 9 feet. 
.sunday...south winds to 30 knots becoming west 15 to 25 knots.
rain and snow showers during the day, then rain showers with a
chance of snow showers sunday night. waves 3 to 6 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am est wed nov 26 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 29.6 inch low over the western great lakes this 
evening will track toward the central great lakes wednesday, then 
track into eastern ontario through wednesday night while deepening 
to 29.4 inches. a cold front from this low will rush across the lake 
wednesday afternoon. the 29.4 inch surface low will then track well 
north of the lake thursday and friday, as a 30.4 inch surface high 
builds into the mid mississippi valley friday and to the ohio valley 
saturday. another surface low will cut northeastward through the 
central great lakes sunday, deepening from 29.6 inches sunday 
morning to 29.4 inches sunday night over western quebec.


loz064-065-262200-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 am est wed nov 26 2025

...gale warning in effect from 4 pm est this afternoon through
friday evening...

.rest of today...south winds 10 to 15 knots becoming southwest
and increasing to 30 knots this afternoon. a chance of showers
late this morning, then showers this afternoon. waves 1 to 3 feet
building to 5 to 8 feet. waves occasionally around 10 feet. 
.tonight...west gales to 35 knots becoming southwest. rain
showers early, then a chance of rain showers late in the evening.
lake effect rain showers with a chance of lake effect snow
showers after midnight. waves 10 to 15 feet. waves occasionally
around 19 feet. 
.thursday...southwest gales to 40 knots becoming west. rain
showers with a chance of snow showers in the morning, then rain
and snow showers in the afternoon. waves 14 to 19 feet building
to 15 to 20 feet. waves occasionally around 26 feet. 
.thursday night...west gales to 40 knots diminishing to 35 knots.
rain and snow showers in the evening, then snow showers
overnight. waves 14 to 19 feet subsiding to 12 to 17 feet. waves
occasionally around 24 feet. 
.friday...northwest gales to 35 knots diminishing to 30 knots.
snow showers during the day, then a chance of snow showers friday
night. waves 10 to 15 feet subsiding to 7 to 10 feet. waves
occasionally around 19 feet. 
.saturday...northwest winds 15 to 25 knots becoming south. snow
showers likely saturday night. waves 4 to 7 feet subsiding to
3 to 5 feet. waves occasionally around 9 feet. 
.sunday...south winds to 30 knots becoming west and diminishing
to 15 to 20 knots. rain and snow showers during the day, then
rain showers with 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
1002 am est wed nov 26 2025


slz022-262200-
saint lawrence river from cape vincent to ogdensburg-
1002 am est wed nov 26 2025

...small craft advisory in effect from 6 pm est this evening
through thursday evening...

.this afternoon...south winds 5 to 10 knots becoming southwest and
increasing to 15 to 20 knots. showers.
.tonight...southwest winds 15 to 25 knots. lake effect rain
showers in the evening, then lake effect rain and snow showers
after midnight. 
.thursday...southwest winds 15 to 25 knots. lake effect rain and
snow showers. 
.thursday night...southwest winds 15 to 25 knots becoming west.
snow showers likely. 
.friday...west winds 15 to 20 knots diminishing to 5 to 15 knots.
snow showers likely during the day. 
.saturday...west winds 10 knots or less becoming southeast. snow
showers likely saturday night. 
.sunday...south winds 5 to 15 knots becoming southwest. snow and
rain showers. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est wed nov 26 2025


slz024-262200-
saint lawrence river from ogdensburg to saint regis-
1002 am est wed nov 26 2025

...small craft advisory in effect from 6 pm est this evening
through thursday evening...

.this afternoon...southeast winds 10 knots or less becoming south.
showers.
.tonight...southwest winds 10 to 15 knots increasing to 15 to
20 knots. lake effect rain showers in the evening, then a chance
of rain and snow showers after midnight. lake effect snow showers
likely with a chance of lake effect rain showers late. 
.thursday...southwest winds 15 to 25 knots. rain and snow showers
likely. 
.thursday night...southwest winds 15 to 25 knots becoming west.
snow showers likely. 
.friday...west winds 15 to 20 knots diminishing to 10 to
15 knots. snow showers likely during the day, then a chance of
snow showers friday night. 
.saturday...west winds 10 knots or less becoming southeast. snow
showers likely saturday night. 
.sunday...southeast winds 5 to 15 knots becoming southwest. rain
and snow showers. 

$$