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open lake forecast for lake ontario
national weather service buffalo ny
402 am est wed dec 3 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 surface high will build across the ohio 
valley and lower great lakes later today into thursday morning 
before pushing off the coast. a large 29.2 inch surface low near 
hudson bay will push its cold front across the lake tonight, with 
another 30.4 inch high building in its wake thursday night. the high 
will then quickly move east of the lake friday. another cold front 
will cross the lake late saturday and saturday night, this from a 
29.3 inch low near northern james bay. then, another area of surface 
high pressure averaging 30.3 inches will build eastward across the 
great lakes through sunday.


loz062-031600-
lake ontario open waters from the niagara river to hamlin beach-
402 am est wed dec 3 2025

.today...southwest winds 10 to 15 knots increasing to 30 knots. a
chance of snow showers late this morning. a chance of snow
showers late. waves 1 to 3 feet building to 5 to 8 feet. waves
occasionally around 10 feet. 
.tonight...southwest winds to 30 knots becoming west. lake effect
snow showers likely. waves 6 to 9 feet. waves occasionally around
11 feet. 
.thursday...west winds to 30 knots becoming northwest. lake
effect snow showers likely. waves 6 to 10 feet. waves
occasionally around 13 feet. 
.thursday night...northwest winds 15 to 20 knots becoming
southwest. waves 4 to 7 feet subsiding to 2 to 3 feet. waves
occasionally around 9 feet. 
.friday...south winds 15 to 25 knots becoming southwest. waves
2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to
4 feet. 
.saturday...southwest winds 15 to 25 knots becoming northwest. a
chance of snow showers. waves 3 to 6 feet subsiding to 2 to
4 feet. 
.sunday...north winds 10 to 15 knots. a chance of snow showers.
waves 1 to 3 feet. 

$$

fzus61 kbuf 030902
glflo 
expires:202512031600;;926247

open lake forecast for lake ontario
national weather service buffalo ny
402 am est wed dec 3 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 surface high will build across the ohio 
valley and lower great lakes later today into thursday morning 
before pushing off the coast. a large 29.2 inch surface low near 
hudson bay will push its cold front across the lake tonight, with 
another 30.4 inch high building in its wake thursday night. the high 
will then quickly move east of the lake friday. another cold front 
will cross the lake late saturday and saturday night, this from a 
29.3 inch low near northern james bay. then, another area of surface 
high pressure averaging 30.3 inches will build eastward across the 
great lakes through sunday.


loz063-031600-
lake ontario open waters from hamlin beach to sodus bay-
402 am est wed dec 3 2025

.today...southwest winds 10 to 15 knots increasing to 15 to
25 knots. a chance of snow showers late. waves 1 to 3 feet
building to 3 to 6 feet. 
.tonight...southwest winds to 30 knots becoming west. lake effect
snow showers. waves 4 to 7 feet building to 6 to 10 feet. waves
occasionally around 13 feet. 
.thursday...west winds to 30 knots becoming northwest. lake
effect snow showers. waves 8 to 11 feet building to 9 to 13 feet.
waves occasionally around 16 feet. 
.thursday night...northwest winds to 30 knots becoming southwest
and diminishing to 15 to 20 knots. waves 7 to 10 feet subsiding
to 2 to 3 feet. waves occasionally around 13 feet. 
.friday...south winds 15 to 20 knots becoming southwest. waves
2 to 4 feet. 
.saturday...southwest winds 15 to 20 knots becoming northwest. a
chance of snow showers. waves 3 to 6 feet building to 4 to
7 feet, then subsiding to 3 to 6 feet. waves occasionally around
9 feet. 
.sunday...northwest winds 10 to 15 knots becoming north. a chance
of snow showers. waves 2 to 4 feet subsiding to 1 to 3 feet. 

$$

fzus61 kbuf 030902
glflo 
expires:202512031600;;926248

open lake forecast for lake ontario
national weather service buffalo ny
402 am est wed dec 3 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 surface high will build across the ohio 
valley and lower great lakes later today into thursday morning 
before pushing off the coast. a large 29.2 inch surface low near 
hudson bay will push its cold front across the lake tonight, with 
another 30.4 inch high building in its wake thursday night. the high 
will then quickly move east of the lake friday. another cold front 
will cross the lake late saturday and saturday night, this from a 
29.3 inch low near northern james bay. then, another area of surface 
high pressure averaging 30.3 inches will build eastward across the 
great lakes through sunday.


loz064-065-031600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est wed dec 3 2025

.today...southwest winds 5 to 15 knots increasing to 15 to
25 knots. a chance of snow showers this morning. a chance of snow
showers late. waves 1 foot or less building to 3 to 6 feet. 
.tonight...southwest winds to 30 knots becoming west. snow
showers likely early, then lake effect snow and rain showers late
in the evening. lake effect snow showers after midnight. waves
5 to 9 feet building to 7 to 11 feet. waves occasionally around
14 feet. 
.thursday...west winds to 30 knots becoming northwest. lake
effect snow showers in the morning, then a chance of snow showers
in the afternoon. waves 8 to 11 feet building to 9 to 13 feet.
waves occasionally around 16 feet. 
.thursday night...northwest winds to 30 knots becoming south and
diminishing to 10 to 15 knots overnight. a chance of snow showers
overnight. waves 7 to 10 feet subsiding to 1 to 3 feet. waves
occasionally around 13 feet. 
.friday...south winds 15 to 25 knots becoming southwest. a chance
of snow showers. waves 3 to 6 feet. 
.saturday...southwest winds 15 to 25 knots becoming northwest.
snow showers likely. waves 3 to 6 feet building to 4 to 7 feet,
then subsiding to 3 to 6 feet. waves occasionally around 9 feet. 
.sunday...north winds 10 to 15 knots. a chance of snow showers.
waves 2 to 4 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
402 am est wed dec 3 2025


slz022-031600-
saint lawrence river from cape vincent to ogdensburg-
402 am est wed dec 3 2025

.today...south winds 10 knots or less becoming southwest 10 to
15 knots. a chance of snow showers from late morning on. 
.tonight...southwest winds 15 to 20 knots becoming west 10 to
15 knots. lake effect snow showers. 
.thursday...west winds 10 to 15 knots becoming northwest. lake
effect snow showers likely in the morning, then a chance of snow
showers in the afternoon. 
.thursday night...northwest winds 5 to 15 knots becoming south
less than 10 knots. mainly clear. 
.friday...south winds 5 to 15 knots. a chance of snow showers. 
.saturday...south winds 5 to 10 knots becoming west. snow showers
likely. 
.sunday...north winds less than 10 knots. a chance of snow
showers. 

$$