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open lake forecast for lake ontario
national weather service buffalo ny
402 pm 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 29.3 inch low over the upper peninsula of michigan 
this evening will track northeast into lower quebec by thursday 
morning. meanwhile, a cold front over the center of the lake will 
continue to exit east across the lake and into new england. the 29.3 
inch surface low will 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. a 30.5 inch surface high centered over 
the central plains will then build east across the great lakes 
monday.


loz064-065-270400-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 pm est wed nov 26 2025

...gale warning in effect through friday evening...

.tonight...west gales to 35 knots becoming southwest. a chance of
rain showers this evening, then lake effect rain showers likely
with a chance of lake effect snow showers after midnight. waves
10 to 14 feet. waves occasionally around 18 feet. 
.thursday...southwest gales to 35 knots becoming west to
40 knots. lake effect rain with lake effect snow showers likely
in the morning, then lake effect rain early in the afternoon.
lake effect rain and snow late. waves 12 to 17 feet. waves
occasionally around 22 feet. 
.thursday night...west gales to 35 knots in the evening. lake
effect snow and lake effect rain with a few rumbles of thunder
possible in the evening, then lake effect snow overnight. waves
12 to 17 feet subsiding to 10 to 15 feet. waves occasionally
around 22 feet. 
.friday...west winds to 30 knots increasing to 35 knot gales.
lake effect snow showers likely. waves 10 to 15 feet. waves
occasionally around 19 feet. 
.friday night...northwest winds to 30 knots. a chance of snow
showers. waves 10 to 14 feet subsiding to 6 to 9 feet. waves
occasionally around 18 feet. 
.saturday...northwest winds 15 to 20 knots becoming southeast and
increasing to 30 knots. lake effect snow showers likely saturday
night. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.sunday...south gales to 35 knots becoming west and diminishing
to 30 knots. lake effect rain and snow showers during the day,
then lake effect rain showers with a chance of lake effect snow
showers sunday night. waves 6 to 10 feet. waves occasionally
around 13 feet. 
.monday...west winds 15 to 20 knots becoming southeast 10 to
15 knots. a chance of lake effect snow showers. waves 4 to 7 feet
subsiding to 1 to 3 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
402 pm est wed nov 26 2025


slz022-270400-
saint lawrence river from cape vincent to ogdensburg-
402 pm est wed nov 26 2025

...small craft advisory in effect through thursday evening...

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

$$

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


slz024-270400-
saint lawrence river from ogdensburg to saint regis-
402 pm est wed nov 26 2025

...small craft advisory in effect through thursday evening...

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

$$