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open lake forecast for lake ontario
national weather service buffalo ny
402 am est mon dec 8 2025

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 30.4 inch high will move across the lake this 
afternoon, and slide to the east tonight, and then move off the east 
coast tomorrow. a 29.5 inch low will move across the upper great 
lakes tuesday, then a stronger low averaging 29.3 inches will 
approach the region tuesday night and potentially move northwest of 
the lake wednesday. a 29.9 inch high is expected to move into the 
great lakes region thursday, followed by a 29.6 inch low which may 
approach the lake from the northwest late friday.


loz063-081600-
lake ontario open waters from hamlin beach to sodus bay-
402 am est mon dec 8 2025

.today...north winds 15 to 20 knots becoming west and diminishing
to 5 to 10 knots. waves 3 to 6 feet subsiding to 2 feet or less. 
.tonight...west winds 5 to 15 knots becoming south. waves 2 feet
or less. 
.tuesday...south winds 15 to 25 knots. snow showers in the
afternoon. waves 2 to 4 feet building to 3 to 6 feet. 
.tuesday night...southwest winds to 30 knots diminishing to 15 to
25 knots. snow and rain showers. waves 3 to 6 feet building to
4 to 7 feet, then subsiding to 3 to 6 feet. waves occasionally
around 9 feet. 
.wednesday...south winds to 30 knots becoming northwest. rain
showers during the day, then snow and rain showers wednesday
night. waves 3 to 6 feet building to 6 to 10 feet. waves
occasionally around 13 feet. 
.thursday...northwest winds 15 to 25 knots becoming west. a
chance of snow showers. waves 5 to 8 feet subsiding to 3 to
5 feet. waves occasionally around 10 feet. 
.friday...west winds 15 to 25 knots. a chance of snow showers
during the day, then snow showers likely friday night. waves 3 to
6 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am est mon dec 8 2025

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 30.4 inch high will move across the lake this 
afternoon, and slide to the east tonight, and then move off the east 
coast tomorrow. a 29.5 inch low will move across the upper great 
lakes tuesday, then a stronger low averaging 29.3 inches will 
approach the region tuesday night and potentially move northwest of 
the lake wednesday. a 29.9 inch high is expected to move into the 
great lakes region thursday, followed by a 29.6 inch low which may 
approach the lake from the northwest late friday.


loz064-065-081600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est mon dec 8 2025

.today...north winds 15 to 20 knots becoming west and diminishing
to 10 knots or less this afternoon. scattered flurries early.
waves 3 to 6 feet subsiding to 2 feet or less. 
.tonight...west winds 5 to 15 knots becoming south. waves 2 feet
or less. 
.tuesday...south winds 15 to 25 knots increasing to 30 knots.
snow showers likely in the afternoon. waves 2 to 4 feet building
to 6 to 9 feet. waves occasionally around 11 feet. 
.tuesday night...south winds to 30 knots becoming southwest. snow
showers in the evening, then snow and rain showers overnight.
waves 5 to 9 feet. waves occasionally around 11 feet. 
.wednesday...south winds to 30 knots becoming northwest. rain and
snow showers. waves 4 to 7 feet building to 7 to 10 feet. waves
occasionally around 13 feet. 
.thursday...northwest winds 15 to 25 knots becoming west. snow
showers likely during the day, then a chance of snow showers
thursday night. waves 5 to 8 feet subsiding to 2 to 4 feet. waves
occasionally around 10 feet. 
.friday...west winds 15 to 25 knots becoming southwest. snow
showers likely. waves 3 to 6 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est mon dec 8 2025


slz022-081600-
saint lawrence river from cape vincent to ogdensburg-
402 am est mon dec 8 2025

.today...north winds 10 knots or less becoming southwest. sunny.
.tonight...light and variable winds. mainly clear early, then
becoming mostly cloudy. 
.tuesday...south winds 5 to 15 knots increasing to 15 to
20 knots. a chance of snow showers in the afternoon. 
.tuesday night...south winds 15 to 20 knots diminishing to 10 to
15 knots. snow showers. 
.wednesday...south winds 10 to 15 knots becoming west 5 to
10 knots. snow and rain showers. 
.thursday...west winds 10 knots or less. snow showers likely
during the day, then a chance of snow showers thursday night. 
.friday...west winds 5 to 10 knots becoming south. a chance of
snow showers during the day, then snow showers likely friday
night. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est mon dec 8 2025


slz024-081600-
saint lawrence river from ogdensburg to saint regis-
402 am est mon dec 8 2025

.today...northwest winds 10 knots or less becoming southwest.
sunny.
.tonight...southwest winds less than 10 knots becoming south.
mainly clear early, then becoming mostly cloudy. 
.tuesday...south winds 10 knots or less increasing to 10 to
15 knots. a chance of snow showers in the afternoon. 
.tuesday night...south winds 15 to 20 knots diminishing to 5 to
15 knots. snow showers. 
.wednesday...south winds 5 to 10 knots becoming west 10 to
15 knots. snow and rain showers during the day, then snow showers
wednesday night. 
.thursday...west winds 5 to 10 knots. a chance of snow showers. 
.friday...southwest winds 5 to 10 knots becoming south. a chance
of snow showers. 

$$