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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est wed jan 21 2026

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 29.8 inch low will move from the upper great lakes to 
central quebec through thursday, then to the canadian maritimes 
friday. this low will push a series of cold fronts across the lake, 
with the first passing this evenin, a second arctic cold front 
across the lake thursday morning, followed by a reinforcing tertiary 
front late thursday night into friday morning. at the same time, a 
large 31.1 inch high will build from northwestern canada to the 
northern plains states, with the high then weakening to 30.7 inches 
as it slides eastward across the great lakes and new england over 
the weekend and into monday.


loz063>065-220400-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm est wed jan 21 2026

...gale warning in effect from 1 am est thursday through friday
evening...

.tonight...south winds to 30 knots becoming southwest. snow
showers likely through the early overnight, then a chance of snow
showers late. waves 7 to 11 feet building to 10 to 13 feet. waves
occasionally around 16 feet. 
.thursday...southwest gales to 35 knots becoming west to
40 knots. a chance of lake effect snow showers early, then lake
effect snow showers likely from late morning on. waves 10 to
15 feet building to 14 to 19 feet. waves occasionally around
24 feet. 
.thursday night...west gales to 40 knots diminishing to 35 knots.
lake effect snow. waves 14 to 19 feet subsiding to 13 to 17 feet.
waves occasionally around 24 feet. 
.friday...west gales to 35 knots. lake effect snow showers. waves
12 to 17 feet. waves occasionally around 22 feet. 
.friday night...northwest gales to 35 knots diminishing to 15 to
25 knots overnight. lake effect snow showers. waves 11 to 15 feet
subsiding to 4 to 7 feet. waves occasionally around 19 feet. 
.saturday...north winds 15 to 20 knots becoming east 5 to
15 knots. a chance of snow showers during the day, then a chance
of snow saturday night. waves 3 to 5 feet subsiding to 1 to
3 feet. 
.sunday...east winds 15 to 20 knots. snow likely. waves 2 to
4 feet building to 3 to 6 feet. 
.monday...north winds 15 to 25 knots becoming west to 30 knots. a
chance of snow showers. waves 3 to 5 feet building to 6 to
9 feet. waves occasionally around 11 feet. 

$$