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open lake forecast for lake ontario
national weather service buffalo ny
1004 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...a ridge of high pressure averaging 30.1 inches will 
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.


loz062-122100-
lake ontario open waters from the niagara river to hamlin beach-
1004 am edt thu mar 12 2026

...gale watch in effect from friday afternoon through saturday
morning...

.rest of today...west winds to 30 knots diminishing to 15 to
20 knots. scattered snow showers early this afternoon. waves 5 to
9 feet subsiding to 4 to 7 feet. waves occasionally around
11 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
1004 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...a ridge of high pressure averaging 30.1 inches will 
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>065-122100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1004 am edt thu mar 12 2026

...gale watch in effect from friday evening through saturday
afternoon...

.rest of today...west winds to 30 knots. scattered snow showers
late this morning. waves 8 to 12 feet. waves occasionally around
15 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
354 pm 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 shift east tonight. strong 
low pressure of 29.10 inches will move east through the great 
lakes on friday, extending a cold front across the lake friday 
afternoon. high pressure 30.30 inches will enter the region on 
saturday. a warm front will lift north across the lake on sunday
night ahead of strong low pressure of 29.10 inches that will wrap 
a cold front east across the lake on monday.


lez061-168-169-130215-
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-
354 pm edt thu mar 12 2026

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

.tonight...west winds 5 to 15 knots becoming south. waves in ice
free areas 1 to 3 feet. 
.friday...south winds 15 to 25 knots becoming southwest and
increasing to 35 knot gales in the afternoon. snow showers likely
with a slight chance of rain showers in the morning, then a
chance of rain and snow showers likely in the afternoon. waves
1 to 3 feet building to 10 to 13 feet. waves occasionally around
16 feet. 
.friday night...southwest gales to 35 knots becoming west and
diminishing to 30 knots overnight. a chance of snow showers in
the evening. waves 9 to 13 feet subsiding to 7 to 10 feet. waves
occasionally around 16 feet. 
.saturday...west winds 15 to 25 knots diminishing to 10 to
15 knots. waves 5 to 8 feet subsiding to 1 to 3 feet. waves
occasionally around 10 feet. 
.saturday night...southwest winds 10 knots or less becoming east
10 to 15 knots. a chance of snow showers overnight. waves 2 feet
or less. 
.sunday...east winds 15 to 20 knots becoming south and increasing
to 30 knots. a chance of rain and snow showers during the day,
then a chance of rain sunday night. waves 1 to 3 feet building to
3 to 6 feet. 
.monday...south winds to 30 knots becoming west and increasing to
35 knot gales. rain with a chance of snow during the day, then a
chance of snow monday night. waves 4 to 7 feet building to 8 to
12 feet. waves occasionally around 15 feet. 
.tuesday...west winds to 30 knots diminishing to 10 to 15 knots.
a chance of snow during the day. waves 6 to 9 feet subsiding to
2 to 4 feet. waves occasionally around 11 feet. 

wave heights are for ice free areas.

$$