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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt mon sep 14 2026


slz022-024-141500-
saint lawrence river from cape vincent to saint regis
403 am edt mon sep 14 2026

.today...northwest winds 5 to 10 knots. sunny.
.tonight...northwest winds less than 10 knots. mainly clear
through the early overnight, then becoming partly cloudy. 
.tuesday...south winds 5 to 15 knots. partly sunny. 
.tuesday night...south winds 10 to 15 knots becoming southwest.
mostly cloudy. 
.wednesday...southwest winds 5 to 10 knots becoming light and
variable. mostly cloudy. 
.thursday...northeast winds less than 10 knots becoming
northwest. a chance of showers. 
.friday...north winds less than 10 knots becoming east. partly
cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon sep 14 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 30.2 inches slides 
eastward across the lower great lakes today. the ridge should exit 
eastward on tuesday and allow a warm front to sweep northeastward 
across the lake. a cold front should sweep eastward across the lake 
on wednesday and be followed by a ridge averaging 30.1 inches and 
building briefly from the upper great lakes. on thursday, the front 
may shift northward to the lake, but then shift back south later in 
the day as a weak low of 30.0 inches wobbles eastward across the 
central great lakes. behind the low and front, a ridge averaging 
30.2 inches should build from the upper midwest through friday.


loz062-141500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt mon sep 14 2026

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

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon sep 14 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 30.2 inches slides 
eastward across the lower great lakes today. the ridge should exit 
eastward on tuesday and allow a warm front to sweep northeastward 
across the lake. a cold front should sweep eastward across the lake 
on wednesday and be followed by a ridge averaging 30.1 inches and 
building briefly from the upper great lakes. on thursday, the front 
may shift northward to the lake, but then shift back south later in 
the day as a weak low of 30.0 inches wobbles eastward across the 
central great lakes. behind the low and front, a ridge averaging 
30.2 inches should build from the upper midwest through friday.


loz063>065-141500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt mon sep 14 2026

.today...north winds 15 to 20 knots becoming northwest 10 to
15 knots. a chance of showers early. waves 3 to 5 feet subsiding
to 1 to 3 feet. 
.tonight...northwest winds 10 knots or less becoming south. waves
1 foot or less. 
.tuesday...south winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.tuesday night...south winds 15 to 25 knots. a chance of showers.
waves 2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to
4 feet. 
.wednesday...southwest winds 5 to 15 knots becoming east. a
chance of showers. waves 1 to 3 feet subsiding to 1 foot or less.
.thursday...east winds 5 to 10 knots becoming north. showers
likely during the day, then a chance of showers thursday night.
waves 2 feet or less. 
.friday...north winds 5 to 10 knots becoming east. waves 2 feet
or less. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
359 am edt mon sep 14 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...
canadian high pressure 30.30 inches builds overhead today before
building to the east tonight. a warm front will lift east across
lake erie on tuesday before a cold front glides southeastward
tuesday night. the cold front will stall south of lake erie as a
stationary front averaging 30.20 inches on wednesday and thursday
before sinking south as a cold front thursday night. 


a cold front continues to push south of lake erie as high pressure
of 30.30 inches builds over lake erie on monday. a stationary 
front will set up in the vicinity of the lake beginning tuesday 
night with pressure averaging 30.20 inches through thursday.


lez061-169-141415-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
359 am edt mon sep 14 2026

.today...north winds 10 to 15 knots becoming light and variable.
waves 1 to 3 feet subsiding to 1 foot or less. 
.tonight...south winds 10 knots or less increasing to 10 to
15 knots. waves 2 feet or less. 
.tuesday...south winds 10 to 15 knots. waves 1 to 3 feet. 
.tuesday night...south winds 5 to 15 knots becoming southwest. a
chance of showers in the evening, then showers likely overnight.
waves 1 to 3 feet. 
.wednesday...south winds 5 to 10 knots becoming northeast. a
chance of showers. waves 1 foot or less. 
.thursday...southwest winds 5 to 10 knots becoming northeast.
showers likely during the day, then a chance of showers thursday
night. waves 2 feet or less. 
.friday...northeast winds 5 to 10 knots becoming east. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$