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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt sat sep 12 2026


slz022-024-121500-
saint lawrence river from cape vincent to saint regis
403 am edt sat sep 12 2026

.today...southeast winds 10 knots or less becoming south. sunny.
.tonight...south winds 5 to 10 knots becoming southwest 10 to
15 knots. showers likely from late evening on. 
.sunday...southwest winds 5 to 15 knots. a chance of showers. 
.sunday night...west winds 5 to 10 knots. a chance of showers. 
.monday...northwest winds 5 to 10 knots becoming light and
variable. mainly clear. 
.tuesday...south winds 5 to 15 knots increasing to 15 to
20 knots. a chance of showers tuesday night. 
.wednesday...southwest winds 10 knots or less becoming southeast.
a chance of showers. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat sep 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 high pressure ridge averaging 30.0 inches will move 
off the east coast today. a warm front will sweep northeastward 
across the lake this evening before a cold front sweeps eastward 
across the lake on sunday. behind the cold front, a ridge averaging 
30.2 inches will slide eastward across the lower great lakes through 
monday. the ridge should exit toward new england on tuesday and 
allow a warm front to sweep northeastward across the lake. on 
wednesday, a cold front should sweep eastward across the lake and be 
followed by a ridge averaging 30.1 inches and building from the 
upper midwest.


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

.today...south winds 5 to 10 knots becoming east. waves 1 foot or
less. 
.tonight...south winds 5 to 15 knots becoming southwest. a chance
of showers through the early overnight. waves 1 to 3 feet. 
.sunday...west winds 5 to 15 knots. waves 1 to 2 feet. 
.sunday night...northwest winds 15 to 20 knots. a chance of
showers. waves 1 to 3 feet building to 3 to 5 feet, then
subsiding to 2 to 4 feet. 
.monday...north winds 5 to 15 knots becoming southeast 10 knots
or less. waves 2 to 4 feet subsiding to 2 feet or less. 
.tuesday...south winds 5 to 15 knots becoming southwest. a chance
of showers. waves 2 feet or less. 
.wednesday...west winds 10 knots or less becoming northeast. a
chance of showers during the day, then showers likely wednesday
night. waves 1 foot or less. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat sep 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 high pressure ridge averaging 30.0 inches will move 
off the east coast today. a warm front will sweep northeastward 
across the lake this evening before a cold front sweeps eastward 
across the lake on sunday. behind the cold front, a ridge averaging 
30.2 inches will slide eastward across the lower great lakes through 
monday. the ridge should exit toward new england on tuesday and 
allow a warm front to sweep northeastward across the lake. on 
wednesday, a cold front should sweep eastward across the lake and be 
followed by a ridge averaging 30.1 inches and building from the 
upper midwest.


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

.today...south winds 15 to 20 knots becoming southeast 10 to
15 knots. waves 1 to 3 feet. 
.tonight...south winds 15 to 20 knots. showers likely with a
chance of thunderstorms through the early overnight, then a
chance of showers late. waves 1 to 3 feet building to 2 to
4 feet. 
.sunday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 1 to 3 feet. 
.sunday night...west winds 10 to 15 knots becoming northwest
15 to 20 knots. a chance of showers. waves 2 to 4 feet building
to 3 to 5 feet. 
.monday...north winds 15 to 20 knots becoming southeast 5 to
15 knots. waves 3 to 5 feet subsiding to 1 foot or less. 
.tuesday...south winds 15 to 25 knots. a chance of showers
tuesday night. waves 1 to 3 feet building to 2 to 4 feet. 
.wednesday...southwest winds 5 to 15 knots becoming southeast
10 knots or less. a chance of showers. waves 1 to 3 feet
subsiding to 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake erie
national weather service cleveland oh
352 am edt sat sep 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 warm front will lift across the region today before a cold 
front follows across the area on sunday. high pressure 30.30 will
move over the lake on monday and exit east on tuesday. a cold
front will approach the lake on tuesday night and settle south of
the lake for wednesday.


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-
352 am edt sat sep 12 2026

.today...south winds 5 to 10 knots becoming southwest. a chance
of showers early this afternoon. a chance of showers and
thunderstorms late. waves 2 feet or less. 
.tonight...southwest winds 10 to 15 knots. a chance of showers
and thunderstorms in the evening, then a chance of showers after
midnight. waves 1 to 3 feet. 
.sunday...west winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday night...northwest winds 15 to 20 knots becoming north.
waves 2 to 3 feet building to 3 to 5 feet. 
.monday...north winds 15 to 20 knots becoming southeast 5 to
15 knots. waves 3 to 5 feet subsiding to 2 feet or less. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. a chance of showers tuesday night. waves 1 to 3 feet. 
.wednesday...south winds 10 knots or less becoming southwest. a
chance of showers during the day, then showers likely with a
chance of thunderstorms wednesday night. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$