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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm 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 over the lake this evening, will move 
east and off the east coast tuesday. 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. 
30.0 inches will average across the lower great lakes region 
saturday.


loz064-065-091000-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 pm est mon dec 8 2025

.rest of tonight...northwest winds 5 to 15 knots becoming south.
a chance of snow showers. waves 2 feet or less. 
.tuesday...south winds 15 to 25 knots increasing to 30 knots. a
chance of snow showers early. a chance of snow showers early in
the afternoon, then snow showers likely late. waves 1 to 3 feet
building to 5 to 8 feet. waves occasionally around 10 feet. 
.tuesday night...south winds to 30 knots. snow in the evening,
then snow and rain overnight. waves 5 to 8 feet. waves
occasionally around 10 feet. 
.wednesday...south winds to 30 knots becoming southwest. rain and
snow in the morning, then rain in the afternoon. waves 3 to
6 feet building to 5 to 8 feet. waves occasionally around
10 feet. 
.wednesday night...southwest winds to 30 knots becoming
northwest. rain and snow in the evening, then snow overnight.
waves 5 to 9 feet. waves occasionally around 11 feet. 
.thursday...northwest winds 15 to 25 knots. snow showers likely.
waves 5 to 9 feet. waves occasionally around 11 feet. 
.friday...northwest winds 15 to 20 knots becoming southwest. snow
showers likely. waves 4 to 7 feet subsiding to 3 to 5 feet. waves
occasionally around 9 feet. 
.saturday...southwest winds 15 to 25 knots becoming west. snow
showers likely. waves 4 to 7 feet building to 6 to 10 feet, then
subsiding to 5 to 8 feet. waves occasionally around 13 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm est mon dec 8 2025


slz022-091000-
saint lawrence river from cape vincent to ogdensburg-
1002 pm est mon dec 8 2025

.rest of tonight...southwest winds less than 10 knots. partly
cloudy, then becoming mostly cloudy. 
.tuesday...south winds 5 to 15 knots. a chance of snow showers
late. 
.tuesday night...south winds 15 to 20 knots diminishing to 10 to
15 knots. snow.
.wednesday...south winds 10 to 15 knots. snow and rain. 
.wednesday night...southwest winds 5 to 15 knots becoming west.
snow and rain in the evening, then snow overnight. 
.thursday...west winds 5 to 10 knots. a chance of snow showers. 
.friday...west winds 10 knots or less becoming southwest. a
chance of snow showers. 
.saturday...southwest winds 5 to 10 knots becoming west. a chance
of snow showers. 

$$