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open lake forecast for lake ontario
national weather service buffalo ny
1009 am edt tue mar 17 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 30.4 inch surface high centered over the lower ohio 
valley this late morning will ridge northward, across the lake 
tonight. the high will then shift east of the lake wednesday and 
reach the east coast by wednesday evening. a 30.2 inch high will 
move into the great lakes region thursday. a 29.8 inch low will move 
from james bay to the canadian maritimes friday. this may result in 
a cold front crossing the lake through friday.


loz063>065-172100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1009 am edt tue mar 17 2026

...gale warning in effect until 7 pm edt this evening...

.rest of today...west gales to 40 knots diminishing to 35 knots.
lake effect snow showers. waves 14 to 19 feet subsiding to 12 to
16 feet. waves occasionally around 24 feet. 
.tonight...west winds to 30 knots becoming northwest 15 to
25 knots. lake effect snow showers in the evening, then a chance
of lake effect snow showers after midnight. waves 10 to 14 feet
subsiding to 4 to 7 feet. waves occasionally around 18 feet. 
.wednesday...northwest winds 5 to 10 knots becoming south. lake
effect snow showers likely in the morning, then a chance of snow
showers in the afternoon. waves 3 to 5 feet subsiding to 1 to
3 feet. 
.wednesday night...southeast winds 10 to 15 knots becoming south
15 to 20 knots. waves 2 feet or less building to 3 to 5 feet. 
.thursday...south winds 15 to 20 knots becoming west 10 to
15 knots. a chance of snow showers during the day, then a chance
of rain showers thursday night. waves 3 to 5 feet subsiding to
2 feet or less. 
.friday...southwest winds around 10 knots becoming north and
increasing to 15 to 20 knots. a chance of rain and snow showers.
waves 2 feet or less building to 3 to 5 feet. 
.saturday...northeast winds 15 to 25 knots becoming south to
30 knots. a chance of rain and snow showers. waves 3 to 6 feet
building to 5 to 8 feet. waves occasionally around 10 feet. 

$$