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


slz022-090400-
saint lawrence river from cape vincent to ogdensburg-
402 pm est mon dec 8 2025

.tonight...southwest winds less than 10 knots. mainly clear
early, 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. 

$$

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


slz024-090400-
saint lawrence river from ogdensburg to saint regis-
402 pm est mon dec 8 2025

.tonight...southwest winds 10 knots or less becoming south.
mainly clear early, then becoming mostly cloudy. 
.tuesday...south winds 10 knots or less. partly sunny early, then
becoming mostly cloudy. 
.tuesday night...south winds 10 to 15 knots. snow.
.wednesday...south winds 5 to 10 knots becoming southeast. snow
in the morning, then snow and rain in the afternoon. 
.wednesday night...southwest winds 10 to 15 knots becoming west.
snow.
.thursday...west winds 5 to 15 knots. a chance of snow showers. 
.friday...southwest winds 10 knots or less. a chance of snow
showers. 
.saturday...southwest winds 5 to 10 knots becoming west. a chance
of snow showers. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 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.


loz063-090400-
lake ontario open waters from hamlin beach to sodus bay-
402 pm est mon dec 8 2025

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

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 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.


loz064-065-090400-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 pm est mon dec 8 2025

.tonight...northwest winds 5 to 15 knots becoming south. a chance
of snow showers from late evening on. 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. 

$$