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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est sun jan 18 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 29.6 inch low will move from near lake superior 
tonight to central quebec by later monday night, while pushing an 
arctic cold front across the lake monday afternoon. a 30.5 inch high 
will then slide east across the southeastern states tuesday and 
tuesday night, with a 29.8 inch low then making its way across the 
central great lakes wednesday, to central quebec thursday, and 
across atlantic canada friday.


loz063>065-191000-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm est sun jan 18 2026

...gale warning in effect from 7 am est monday through late
tuesday night...
...heavy freezing spray warning in effect from 7 am est monday
through late tuesday night...

.rest of tonight...southwest winds 15 to 20 knots. a chance of
snow showers, then snow showers likely late. waves 3 to 6 feet. 
.monday...southwest winds to 30 knots increasing to 40 knot gales
in the afternoon. heavy freezing spray. snow showers likely
through early afternoon, then lake effect snow late. waves 5 to
8 feet building to 13 to 17 feet. waves occasionally around
22 feet. 
.monday night...west gales to 40 knots diminishing to 30 knots.
heavy freezing spray. lake effect snow. waves 15 to 20 feet
subsiding to 12 to 16 feet. waves occasionally around 26 feet. 
.tuesday...west winds to 30 knots increasing to 35 knot gales.
heavy freezing spray. lake effect snow. waves 10 to 15 feet.
waves occasionally around 19 feet. 
.tuesday night...west winds to 30 knots becoming southwest. heavy
freezing spray. lake effect snow. waves 10 to 15 feet subsiding
to 7 to 11 feet. waves occasionally around 19 feet. 
.wednesday...south winds to 30 knots becoming southwest. snow
showers likely. waves 5 to 8 feet building to 10 to 13 feet.
waves occasionally around 16 feet. 
.thursday...west gales to 35 knots diminishing to 30 knots. snow
showers likely. waves 10 to 14 feet. waves occasionally around
18 feet. 
.friday...west winds 15 to 25 knots. snow showers likely during
the day, then a chance of snow showers friday night. waves 7 to
10 feet subsiding to 3 to 6 feet. waves occasionally around
13 feet. 

$$
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