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open lake forecast for lake ontario
national weather service buffalo ny
1002 am est mon jan 12 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...the axis of surface-based ridging attendant to a 30.5 
inch high over the tennessee valley will slide out across new 
england today...while a surface trough averaging 29.8 inches passes 
just to the north of the lake. another 29.3 inch low will then move 
from western ontario tuesday to southern quebec wednesday. this 
system will push its trailing cold front across the lake wednesday 
night, when a secondary 29.4 inch coastal low will develop along the 
mid-atlantic coastline. this secondary low will then track northeast 
to the gulf of maine thursday and to newfoundland friday...while 
30.0 inch high pressure slowly builds east across the great lakes.


loz063>065-122200-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am est mon jan 12 2026

.rest of today...west winds to 30 knots. lake effect snow showers
likely late this morning, then lake effect snow this afternoon.
waves 8 to 12 feet. waves occasionally around 15 feet. 
.tonight...west winds to 30 knots becoming southwest 15 to
25 knots. lake effect snow early, then lake effect snow showers
likely late in the evening. a chance of snow showers after
midnight. waves 8 to 11 feet subsiding to 4 to 7 feet. waves
occasionally around 14 feet. 
.tuesday...southwest winds 15 to 25 knots becoming south. a
chance of rain showers in the afternoon. waves 3 to 6 feet
subsiding to 2 to 4 feet. 
.tuesday night...south winds 20 to 25 knots becoming southwest.
rain showers likely. waves 3 to 6 feet building to 4 to 7 feet.
waves occasionally around 9 feet. 
.wednesday...southwest winds 15 to 25 knots becoming north. rain
showers likely with a chance of snow showers during the day, then
snow showers with rain showers likely wednesday night. waves 3 to
6 feet. 
.thursday...north winds 15 to 25 knots. snow showers during the
day, then a chance of snow showers thursday night. waves 4 to
7 feet subsiding to 3 to 6 feet. waves occasionally around
9 feet. 
.friday...northwest winds 15 to 20 knots becoming south. a chance
of snow showers. waves 3 to 5 feet subsiding to 2 to 4 feet. 

$$