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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon oct 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 weak ridge averaging 29.9 inches will slide eastward 
across the lake today before exiting eastward tonight. a cold front 
will sweep southeastward across the lake on tuesday. behind the cold 
front, a ridge averaging 30.2 inches builds from northern ontario 
through thursday. a 29.9 inch low may move across the great lakes 
region friday. this low has the potential to deepen into a stronger 
low.


loz062-121500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt mon oct 12 2026

.today...west winds 10 knots or less becoming southwest. waves
2 feet or less. 
.tonight...southwest winds 5 to 15 knots. a chance of showers and
thunderstorms late. waves 2 feet or less. 
.tuesday...southwest winds 10 to 15 knots increasing to 15 to
20 knots. showers likely with a chance of thunderstorms. waves
1 to 3 feet building to 2 to 4 feet. 
.tuesday night...southwest winds 15 to 20 knots becoming
northwest 10 to 15 knots. showers likely with a chance of
thunderstorms in the evening, then a chance of showers overnight.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots becoming north. waves
2 feet or less. 
.thursday...northeast winds 10 to 15 knots becoming east. showers
thursday night. waves 1 to 3 feet. 
.friday...northwest winds 15 to 20 knots increasing to 30 knots.
showers. waves 1 to 3 feet building to 7 to 10 feet. waves
occasionally around 13 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 120802
glflo 
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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon oct 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 weak ridge averaging 29.9 inches will slide eastward 
across the lake today before exiting eastward tonight. a cold front 
will sweep southeastward across the lake on tuesday. behind the cold 
front, a ridge averaging 30.2 inches builds from northern ontario 
through thursday. a 29.9 inch low may move across the great lakes 
region friday. this low has the potential to deepen into a stronger 
low.


loz063>065-121500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt mon oct 12 2026

.today...west winds 10 knots or less. waves 1 foot or less. 
.tonight...southwest winds 5 to 10 knots becoming south. a chance
of showers after midnight. showers likely late. waves 1 foot or
less. 
.tuesday...south winds 10 to 15 knots becoming southwest. showers
likely in the morning, then showers with a chance of
thunderstorms in the afternoon. waves 2 feet or less. 
.tuesday night...southwest winds 10 to 15 knots becoming
northwest. showers with a chance of thunderstorms in the evening,
then a chance of showers overnight. waves 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots becoming north. waves
1 to 3 feet. 
.thursday...northeast winds 5 to 15 knots becoming southeast.
showers thursday night. waves 1 to 3 feet. 
.friday...southwest winds 15 to 25 knots becoming northwest to
30 knots. showers. waves 2 to 4 feet building to 8 to 11 feet.
waves occasionally around 14 feet. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake erie
national weather service cleveland oh
341 am edt mon oct 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...
high pressure 30.00 inches builds to the south of lake erie today
and persists through tuesday. low pressure 29.70 inches moves
through the great lakes late tuesday with a cold front sweeping
across the lake early wednesday. high pressure 30.20 briefly
builds across the great lakes on thursday followed by low pressure
29.60 inches moving through on friday.


lez061-167>169-121415-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 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-
341 am edt mon oct 12 2026

.today...northwest winds 5 to 15 knots becoming southwest. waves
2 feet or less. 
.tonight...southwest winds 10 to 15 knots increasing to 15 to
20 knots. a slight chance of showers and thunderstorms after
midnight. a chance of showers with a slight chance of
thunderstorms late. waves 2 feet or less building to 2 to 4 feet.
.tuesday...south winds 15 to 20 knots becoming southwest. a
chance of showers in the morning. waves 3 to 5 feet. 
.tuesday night...southwest winds 15 to 20 knots becoming
northwest 5 to 15 knots. a chance of showers overnight. waves
3 to 5 feet subsiding to 2 to 4 feet. 
.wednesday...northwest winds 5 to 15 knots becoming northeast. a
chance of showers during the day. waves 1 to 3 feet. 
.thursday...northeast winds 10 to 15 knots becoming south 15 to
20 knots. a chance of showers during the day, then showers likely
thursday night. waves 2 to 4 feet building to 3 to 5 feet. 
.friday...west winds to 30 knots becoming northwest and
increasing to 35 knot gales. showers likely during the day, then
a chance of showers friday night. waves 5 to 8 feet building to
7 to 11 feet. waves occasionally around 14 feet. 

winds and waves higher in and near thunderstorms.

$$