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open lake forecast for lake ontario
national weather service buffalo ny
403 am edt wed mar 11 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 ripple along a frontal boundary 
today, with this wave passing just to the west of the lake this 
afternoon. this low will deepen to 29.4 inches as it moves across 
southern quebec thursday. a 30.2 inch high will move across the ohio 
valley and mid-atlantic region thursday night through friday. a 29.6 
inch surface low will pass across the lake friday night with a cold 
front, then shifting east of the lake saturday. a 30.3 inch surface 
high will ridge across the lake saturday night, and move east of the 
lake sunday. meanwhile, a 29.5 inch surface low over the mid 
mississippi valley sunday morning will track northeastward and 
deepen to 28.9 inches just to the west of the lake monday morning.


loz063>065-111500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 am edt wed mar 11 2026

...gale warning in effect from this evening through thursday
morning...

.today...east winds 15 to 20 knots becoming south. rain showers
with a chance of thunderstorms. waves 3 to 6 feet subsiding to
2 to 4 feet. 
.tonight...south winds 15 to 20 knots becoming west and
increasing to 35 knot gales after midnight. rain showers with a
chance of thunderstorms early, then rain showers likely late in
the evening. a chance of rain showers after midnight. waves 2 to
4 feet building to 13 to 17 feet. waves occasionally around
22 feet. 
.thursday...west gales to 35 knots diminishing to 30 knots. waves
12 to 17 feet subsiding to 10 to 14 feet. waves occasionally
around 22 feet. 
.thursday night...west winds to 30 knots diminishing to 10 to
15 knots overnight. waves 9 to 12 feet subsiding to 3 to 5 feet.
waves occasionally around 15 feet. 
.friday...south winds 15 to 25 knots becoming west and increasing
to 40 knot gales. rain and snow during the day, then snow showers
likely with rain friday night. waves 3 to 5 feet building to
14 to 18 feet. waves occasionally around 23 feet. 
.saturday...west gales to 40 knots becoming north and diminishing
to 10 to 15 knots. a chance of snow showers. waves 14 to 18 feet
subsiding to 2 to 4 feet. waves occasionally around 23 feet. 
.sunday...east winds 15 to 25 knots becoming south and increasing
to 40 knot gales. rain showers with snow showers likely. waves
3 to 5 feet building to 9 to 12 feet. waves occasionally around
15 feet. 

winds and waves higher in and near thunderstorms.

$$