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open lake forecast for lake ontario
national weather service buffalo ny
1010 am edt thu apr 9 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 30.6 inch high will drift southeast of nova scotia 
today. a 29.5 inch low will move across james bay today to northern 
quebec tonight, with a trailing cold front crossing the lake tonight 
through friday. a 30.5 inch high is then forecast to build into the 
central great lakes saturday, then drift east to new england by 
sunday. the cold front from a 29.4 inch low near james bay will 
approach the lake monday and then stall nearby into tuesday.


loz062-092100-
lake ontario open waters from the niagara river to hamlin beach-
1010 am edt thu apr 9 2026

.this afternoon...south winds 15 to 20 knots becoming southwest. a
chance of showers late. waves 2 to 4 feet building to 3 to
5 feet. 
.tonight...southwest winds 15 to 20 knots becoming north 5 to
15 knots. a chance of rain showers late. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.friday...north winds 5 to 10 knots becoming northwest. rain
showers. waves around 1 foot. 
.friday night...northwest winds around 10 knots. rain showers in
the evening. waves 1 to 2 feet. 
.saturday...northwest winds 10 knots or less becoming southeast.
waves 2 feet or less. 
.sunday...east winds 5 to 10 knots becoming southwest and
increasing to 15 to 25 knots. a chance of rain showers. waves
1 foot or less building to 3 to 6 feet. 
.monday...southwest winds to 30 knots diminishing to 15 to
25 knots. a chance of showers. waves 4 to 7 feet building to 5 to
9 feet, then subsiding to 4 to 6 feet. waves occasionally around
11 feet. 

$$

fzus61 kbuf 091410
glflo 
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open lake forecast for lake ontario
national weather service buffalo ny
1010 am edt thu apr 9 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 30.6 inch high will drift southeast of nova scotia 
today. a 29.5 inch low will move across james bay today to northern 
quebec tonight, with a trailing cold front crossing the lake tonight 
through friday. a 30.5 inch high is then forecast to build into the 
central great lakes saturday, then drift east to new england by 
sunday. the cold front from a 29.4 inch low near james bay will 
approach the lake monday and then stall nearby into tuesday.


loz063>065-092100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1010 am edt thu apr 9 2026

.this afternoon...south winds 15 to 25 knots. a chance of showers
late. waves 3 to 6 feet. 
.tonight...south winds 15 to 20 knots becoming west 10 to
15 knots. a chance of showers in the evening. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.friday...west winds 5 to 10 knots becoming northwest. rain
showers. waves 1 to 2 feet. 
.friday night...northwest winds 5 to 15 knots. rain showers in
the evening, then a chance of rain showers overnight. waves
2 feet or less. 
.saturday...northwest winds 5 to 15 knots becoming south less
than 10 knots. waves 2 feet or less. 
.sunday...southeast winds 5 to 15 knots becoming south and
increasing to 30 knots. a chance of rain showers. waves 2 feet or
less building to 4 to 7 feet. waves occasionally around 9 feet. 
.monday...southwest winds 15 to 25 knots. showers likely. waves
5 to 8 feet subsiding to 3 to 6 feet. waves occasionally around
10 feet. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
923 am edt thu apr 9 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 frontal boundary will slowly move southeast into the region this
afternoon before wavering in the vicinity of the lake through
early friday and moving southeast across lake erie during the day
friday. high pressure 30.50 inches will move east over the great 
lakes behind the front late friday into saturday and exit to the 
east as a warm front lifts northeast from the ohio valley by the 
end of the weekend.


lez061-168-169-092015-
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-
923 am edt thu apr 9 2026

.this afternoon...south winds 15 to 20 knots becoming southwest
10 to 15 knots. a slight chance of showers early.
a chance of showers with a slight chance of thunderstorms late.
waves 2 to 4 feet. 
.tonight...southwest winds 10 knots or less. a chance of showers
with a slight chance of thunderstorms through the early
overnight, then a chance of showers late. waves 1 to 3 feet. 
.friday...southeast winds 5 to 10 knots becoming west. a chance
of rain showers in the morning, then rain showers in the
afternoon. waves 1 to 2 feet. 
.friday night...northwest winds 10 knots or less becoming north.
rain showers in the evening. waves 1 foot or less. 
.saturday...north winds less than 10 knots. waves 1 foot or less.
.sunday...southeast winds 5 to 10 knots becoming southwest and
increasing to 15 to 20 knots. waves 2 feet or less building to
2 to 4 feet. 
.monday...southwest winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers during the day, then a chance of
showers and thunderstorms monday night. waves 3 to 5 feet
subsiding to 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$