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open lake forecast for lake ontario
national weather service buffalo ny
545 am edt thu mar 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...low pressure will deepen to 29.2 inches as it moves from 
southern quebec to the canadian maritimes this evening. a ridge of 
high pressure averaging 30.1 inches will then build into the ohio 
valley and lower great lakes this afternoon and evening before 
drifting to the eastern seaboard friday. a 29.0 inch low will then 
move from the upper great lakes friday morning to the ottawa valley 
friday night while weakening to 29.4 inches. this low will continue 
east to the canadian maritimes saturday as a 30.3 inch high builds 
into the lower great lakes. 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.


loz062-121500-
lake ontario open waters from the niagara river to hamlin beach-
545 am edt thu mar 12 2026

...gale warning in effect until 11 am edt this morning...
...gale watch in effect from friday afternoon through saturday
morning...

.today...west winds to 30 knots becoming northwest. a chance of
snow showers early this afternoon. waves 9 to 12 feet subsiding
to 5 to 8 feet. waves occasionally around 15 feet. 
.tonight...northwest winds 15 to 20 knots becoming south 5 to
15 knots. waves 3 to 6 feet subsiding to 1 to 2 feet. 
.friday...southeast winds 15 to 25 knots becoming southwest to
30 knots. snow showers in the morning, then rain and snow showers
in the afternoon. waves 1 to 3 feet building to 5 to 9 feet.
waves occasionally around 11 feet. 
.friday night...southwest winds to 30 knots becoming west and
increasing to 40 knot gales overnight. rain showers with a chance
of snow showers in the evening, then a chance of snow showers
overnight. waves 7 to 10 feet building to 13 to 18 feet. waves
occasionally around 23 feet. 
.saturday...west gales to 35 knots becoming northeast and
diminishing to 10 to 15 knots. a chance of snow showers saturday
night. waves 12 to 16 feet subsiding to 1 to 3 feet. waves
occasionally around 20 feet. 
.sunday...east winds 15 to 20 knots becoming southeast and
increasing to 30 knots. snow showers with rain showers likely.
waves 3 to 5 feet building to 7 to 11 feet. waves occasionally
around 14 feet. 
.monday...south gales to 35 knots becoming west to 40 knots. rain
showers with a chance of snow showers during the day, then a
chance of snow and rain showers monday night. waves 8 to 11 feet
building to 14 to 19 feet. waves occasionally around 24 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
545 am edt thu mar 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...low pressure will deepen to 29.2 inches as it moves from 
southern quebec to the canadian maritimes this evening. a ridge of 
high pressure averaging 30.1 inches will then build into the ohio 
valley and lower great lakes this afternoon and evening before 
drifting to the eastern seaboard friday. a 29.0 inch low will then 
move from the upper great lakes friday morning to the ottawa valley 
friday night while weakening to 29.4 inches. this low will continue 
east to the canadian maritimes saturday as a 30.3 inch high builds 
into the lower great lakes. 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>065-121500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
545 am edt thu mar 12 2026

...gale warning in effect until 11 am edt this morning...
...gale watch in effect from friday evening through saturday
afternoon...

.today...west winds to 30 knots. a chance of snow showers this
morning. waves 10 to 14 feet subsiding to 8 to 11 feet. waves
occasionally around 18 feet. 
.tonight...northwest winds to 30 knots becoming west and
diminishing to 5 to 15 knots after midnight. waves 7 to 10 feet
subsiding to 2 to 4 feet. waves occasionally around 13 feet. 
.friday...south winds 15 to 25 knots becoming southwest to
30 knots. snow showers in the morning, then rain and snow showers
in the afternoon. waves 2 feet or less building to 5 to 8 feet.
waves occasionally around 10 feet. 
.friday night...southwest winds to 30 knots becoming west and
increasing to 40 knot gales overnight. rain showers with snow
showers likely. waves 7 to 10 feet building to 16 to 21 feet.
waves occasionally around 27 feet. 
.saturday...west gales to 40 knots becoming north and diminishing
to 5 to 10 knots. snow showers likely during the day. waves 16 to
21 feet subsiding to 2 to 4 feet. waves occasionally around
27 feet. 
.sunday...east winds 15 to 25 knots becoming southeast and
increasing to 40 knot gales. snow showers likely during the day,
then a chance of rain and snow showers likely sunday night. waves
2 to 4 feet building to 9 to 12 feet. waves occasionally around
15 feet. 
.monday...south gales to 40 knots becoming west. rain and snow
showers. waves 9 to 12 feet building to 15 to 19 feet. waves
occasionally around 24 feet. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
405 am edt thu mar 12 2026

for waters beyond five nautical miles of shore on lake erie

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 ridge averaging 30.10 inches will persist over the lake today. 
strong low pressure 29.00 inches will move east through the great
lakes on friday, extending a cold front across the lake friday 
night. high pressure 30.30 inches will enter the region on 
saturday. a warm front will lift north across the lake on sunday,
followed by another strong low pressure system 29.10 inches and
cold front sunday night into monday.


lez061-168-169-121415-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
405 am edt thu mar 12 2026

...gale warning in effect from friday afternoon through late
friday night...

.today...west winds 15 to 20 knots. a slight chance of snow early
this afternoon. waves in ice free areas 3 to 5 feet subsiding to
2 to 4 feet. 
.tonight...west winds 5 to 15 knots becoming south. a slight
chance of snow late. waves 1 to 3 feet. 
.friday...south winds 15 to 25 knots becoming southwest and
increasing to 35 knot gales in the afternoon. snow and rain
likely in the morning, then snow likely with a chance of rain in
the afternoon. waves 2 to 4 feet building to 8 to 11 feet. waves
occasionally around 14 feet. 
.friday night...southwest gales to 35 knots becoming west and
diminishing to 30 knots overnight. a chance of rain in the
evening. waves 7 to 11 feet subsiding to 6 to 9 feet. waves
occasionally around 14 feet. 
.saturday...west winds 15 to 25 knots becoming east 15 to
20 knots. a chance of snow saturday night. waves 4 to 7 feet
subsiding to 2 feet or less. waves occasionally around 9 feet. 
.sunday...east winds 15 to 20 knots becoming south and increasing
to 35 knot gales. a chance of rain and snow during the day, then
rain likely sunday night. waves 1 to 3 feet building to 3 to
6 feet. 
.monday...southwest winds to 30 knots becoming west and
increasing to 35 knot gales. rain and snow likely during the day,
then a chance of snow monday night. waves 7 to 11 feet subsiding
to 5 to 8 feet. waves occasionally around 14 feet. 

wave heights are for ice free areas.

$$