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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est mon nov 24 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 30.2 inch high along the eastern seaboard this 
evening will drift farther out to sea through the night. a 29.7 inch 
low over the upper midwest tuesday 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.


loz063-251000-
lake ontario open waters from hamlin beach to sodus bay-
1002 pm est mon nov 24 2025

...gale watch in effect from wednesday afternoon through friday
evening...

.overnight...south winds 10 to 15 knots. waves 2 feet or
less. 
.tuesday...south winds 10 to 15 knots becoming southeast. a
chance of rain early in the afternoon. rain likely late. waves
2 feet or less. 
.tuesday night...southeast winds 10 to 15 knots becoming south.
rain. waves 1 to 2 feet. 
.wednesday...south winds 10 to 15 knots becoming southwest and
increasing to 30 knots in the afternoon. showers. waves 1 to
3 feet building to 5 to 8 feet. waves occasionally around
10 feet. 
.wednesday night...west gales to 35 knots increasing to 40 knots.
rain showers in the evening, then lake effect rain and snow
showers likely overnight. waves 10 to 15 feet building to 12 to
17 feet. waves occasionally around 22 feet. 
.thursday...west gales to 45 knots diminishing to 35 knots. lake
effect rain and snow showers likely during the day, then lake
effect snow thursday night. waves 15 to 20 feet subsiding to
14 to 18 feet. waves occasionally around 26 feet. 
.friday...northwest gales to 35 knots diminishing to 30 knots.
lake effect snow showers likely. waves 11 to 16 feet subsiding to
6 to 9 feet. waves occasionally around 20 feet. 
.saturday...northwest winds 15 to 20 knots becoming south 10 to
15 knots. snow showers likely during the day, then a chance of
snow showers saturday night. waves 3 to 6 feet subsiding to 1 to
3 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est mon nov 24 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 30.2 inch high along the eastern seaboard this 
evening will drift farther out to sea through the night. a 29.7 inch 
low over the upper midwest tuesday 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.


loz064-065-251000-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 pm est mon nov 24 2025

...gale watch in effect from wednesday afternoon through friday
evening...

.overnight...south winds 15 to 20 knots. waves 1 to 3 feet.
.tuesday...south winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of rain early in the afternoon. rain likely
late. waves 1 to 3 feet. 
.tuesday night...south winds 10 to 15 knots. rain. waves 1 to
3 feet. 
.wednesday...south winds 10 to 15 knots becoming southwest and
increasing to 30 knots in the afternoon. showers. waves 1 to
3 feet building to 5 to 8 feet. waves occasionally around
10 feet. 
.wednesday night...west gales to 40 knots becoming southwest to
35 knots. lake effect rain in the evening, then lake effect rain
with lake effect snow showers likely overnight. waves 11 to
16 feet building to 13 to 17 feet. waves occasionally around
22 feet. 
.thursday...southwest gales to 40 knots becoming west to
35 knots. lake effect rain and snow during the day, then lake
effect snow thursday night. waves 15 to 20 feet subsiding to
14 to 18 feet. waves occasionally around 26 feet. 
.friday...northwest gales to 35 knots diminishing to 30 knots.
lake effect snow showers likely during the day, then a chance of
snow showers friday night. waves 11 to 16 feet subsiding to 7 to
10 feet. waves occasionally around 20 feet. 
.saturday...northwest winds 15 to 20 knots becoming south 10 to
15 knots. a chance of snow showers. waves 3 to 6 feet subsiding
to 1 to 3 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm est mon nov 24 2025


slz022-251000-
saint lawrence river from cape vincent to ogdensburg-
1002 pm est mon nov 24 2025

.overnight...south winds 5 to 10 knots. cloudy.
.tuesday...south winds 5 to 10 knots. a chance of rain late. 
.tuesday night...southeast winds less than 10 knots. rain.
.wednesday...southeast winds 10 knots or less becoming southwest
and increasing to 15 to 20 knots in the afternoon. showers.
.wednesday night...southwest winds 15 to 25 knots. lake effect
rain showers in the evening, then lake effect rain and snow
showers likely overnight. 
.thursday...southwest winds to 30 knots becoming west and
diminishing to 15 to 20 knots. lake effect rain and snow showers
likely during the day, then lake effect snow showers likely
thursday night. 
.friday...west winds 15 to 20 knots diminishing to 5 to 10 knots.
a chance of snow showers during the day. 
.saturday...west winds 10 knots or less becoming south. a chance
of snow showers saturday night. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm est mon nov 24 2025


slz024-251000-
saint lawrence river from ogdensburg to saint regis-
1002 pm est mon nov 24 2025

.overnight...south winds 5 to 10 knots becoming southwest.
cloudy.
.tuesday...southwest winds 10 knots or less becoming southeast.
mostly cloudy. 
.tuesday night...light and variable winds. rain.
.wednesday...east winds 10 knots or less becoming south and
increasing to 15 to 20 knots in the afternoon. rain showers. 
.wednesday night...southwest winds 15 to 25 knots increasing to
30 knots. lake effect rain showers in the evening, then rain
showers likely with a chance of snow showers overnight. 
.thursday...southwest winds to 30 knots becoming west 15 to
25 knots. lake effect rain and snow showers likely during the
day, then lake effect snow showers likely thursday night. 
.friday...west winds 15 to 20 knots diminishing to 10 to
15 knots. snow showers likely during the day. 
.saturday...west winds 10 knots or less becoming south. a chance
of snow showers saturday night. 

$$