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open lake forecast for lake ontario
national weather service buffalo ny
1007 pm edt fri sep 18 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 averaging 30.4 inches affects the lake through 
sunday as the parent high pressure center moves from near james bay 
to the canadian maritimes. during sunday night, a cold front should 
sweep southward across the lake. behind the front, a ridge averaging 
30.4 inches should build from northern ontario through monday. by 
monday night through tuesday, a low of 30.0 inches should move from 
near the lower ohio valley toward the mid-atlantic states and extend 
a weak trough averaging 30.3 inches over the eastern great lakes.


loz062-190915-
lake ontario open waters from the niagara river to hamlin beach-
1007 pm edt fri sep 18 2026

.overnight...northeast winds 10 to 15 knots becoming east
15 to 20 knots. waves 1 to 2 feet building to 3 to 5 feet. 
.saturday...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet. 
.saturday night...east winds 10 to 15 knots. a chance of showers
overnight. waves 1 to 3 feet. 
.sunday...east winds 10 to 15 knots becoming northeast. a chance
of showers. waves 1 to 3 feet. 
.sunday night...northeast winds 10 to 15 knots increasing to
15 to 25 knots. waves 1 to 3 feet building to 3 to 5 feet. 
.monday...northeast winds 15 to 25 knots increasing to 30 knots.
waves 3 to 6 feet building to 6 to 9 feet. waves occasionally
around 11 feet. 
.tuesday...east winds to 30 knots. a chance of showers tuesday
night. waves 6 to 9 feet. waves occasionally around 11 feet. 
.wednesday...east winds 15 to 25 knots. a chance of showers.
waves 4 to 7 feet subsiding to 3 to 6 feet. waves occasionally
around 9 feet. 

$$

fzus61 kbuf 190207
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open lake forecast for lake ontario
national weather service buffalo ny
1007 pm edt fri sep 18 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 averaging 30.4 inches affects the lake through 
sunday as the parent high pressure center moves from near james bay 
to the canadian maritimes. during sunday night, a cold front should 
sweep southward across the lake. behind the front, a ridge averaging 
30.4 inches should build from northern ontario through monday. by 
monday night through tuesday, a low of 30.0 inches should move from 
near the lower ohio valley toward the mid-atlantic states and extend 
a weak trough averaging 30.3 inches over the eastern great lakes.


loz063>065-190915-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1007 pm edt fri sep 18 2026

.overnight...northeast winds 15 to 20 knots. waves 1 to
3 feet building to 2 to 4 feet. 
.saturday...northeast winds 5 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.saturday night...east winds 5 to 10 knots becoming southeast. a
chance of showers overnight. waves 2 feet or less. 
.sunday...southeast winds 10 to 15 knots becoming northeast.
showers likely. waves 1 to 3 feet. 
.sunday night...northeast winds 15 to 25 knots. a chance of
showers in the evening. waves 2 to 4 feet building to 3 to
5 feet. 
.monday...northeast winds 15 to 25 knots. waves 4 to 7 feet
building to 5 to 8 feet. waves occasionally around 10 feet. 
.tuesday...east winds 15 to 25 knots. waves 5 to 8 feet subsiding
to 3 to 6 feet. waves occasionally around 10 feet. 
.wednesday...east winds 15 to 20 knots becoming southeast. a
chance of showers. waves 3 to 6 feet subsiding to 2 to 4 feet. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
947 pm edt fri sep 18 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...
high pressure 30.20 inches over the northern great lakes will
weaken tonight. this will allow a warm front to lift to south of
lake erie saturday as low pressure 29.80 inches moves east across
the southern great lakes saturday night into sunday. this will 
pull a cold front across the lake sunday afternoon. a trough 
averaging 29.90 inches will linger early next week.


lez061-168-169-190815-
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-
947 pm edt fri sep 18 2026

.overnight...northeast winds 10 to 15 knots becoming east.
waves 1 to 3 feet. 
.saturday...east winds 5 to 15 knots. a slight chance of showers
late. waves 1 to 3 feet. 
.saturday night...east winds 5 to 15 knots becoming south. a
chance of showers in the evening, then showers overnight. waves
2 feet or less. 
.sunday...south winds 5 to 15 knots becoming northeast 15 to
20 knots. showers likely. waves 1 to 3 feet building to 2 to
4 feet. 
.sunday night...northeast winds 15 to 25 knots. a chance of
showers in the evening. waves 2 to 4 feet building to 4 to
7 feet. waves occasionally around 9 feet. 
.monday...northeast winds 15 to 25 knots becoming east to
30 knots. a chance of showers monday night. waves 5 to 9 feet.
waves occasionally around 11 feet. 
.tuesday...east winds to 30 knots diminishing to 15 to 25 knots.
a chance of showers. waves 5 to 9 feet. waves occasionally around
11 feet. 
.wednesday...east winds 15 to 20 knots. a chance of showers
during the day, then showers likely wednesday night. waves 3 to
6 feet subsiding to 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$