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open lake forecast for lake ontario
national weather service buffalo ny
1002 am est mon dec 1 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 surface high centered over the central 
plains will build east across the great lakes today, sliding quickly 
to new england on tuesday. a 29.6 inch surface low off the carolina 
coastline tuesday morning will deepen to 28.9 inches over southern 
atlantic canada by early wednesday morning before going out to sea. 
a 30.2 inch surface high will build across the ohio valley and lower 
great lakes later wednesday into thursday morning before pushing off 
the coast. a large 29.2 inch surface low near hudson bay will push 
its cold front across the lake on thursday, with another 30.4 inch 
high building in its wake thursday night. the high will then quickly 
move east of the lake friday.


loz064-065-012200-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 am est mon dec 1 2025

.this afternoon...northwest winds 5 to 15 knots becoming west.
waves 3 to 5 feet subsiding to 2 feet or less. 
.tonight...southwest winds 10 knots or less becoming southeast
10 to 15 knots. snow likely late. waves 2 feet or less. 
.tuesday...southeast winds 5 to 15 knots becoming northeast.
snow. waves 1 to 3 feet subsiding to 1 foot or less. 
.tuesday night...north winds 5 to 10 knots becoming northwest. a
chance of snow showers in the evening. waves 2 feet or less. 
.wednesday...southwest winds 15 to 20 knots becoming west and
increasing to 30 knots. a chance of snow showers during the day,
then snow showers wednesday night. waves 2 to 4 feet building to
7 to 10 feet. waves occasionally around 13 feet. 
.thursday...northwest winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. snow showers during the day, then
a chance of snow showers thursday night. waves 7 to 10 feet
subsiding to 2 to 4 feet. waves occasionally around 13 feet. 
.friday...south winds 15 to 20 knots. a chance of snow showers
friday night. waves 2 to 4 feet building to 3 to 5 feet, then
subsiding to 2 to 4 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est mon dec 1 2025


slz022-012200-
saint lawrence river from cape vincent to ogdensburg-
1002 am est mon dec 1 2025

.this afternoon...northwest winds 5 to 10 knots becoming light and
variable. mostly sunny. 
.tonight...light and variable winds. a chance of snow showers
late. 
.tuesday...southeast winds less than 10 knots becoming northeast.
snow likely. 
.tuesday night...northeast winds less than 10 knots. a chance of
snow showers in the evening. 
.wednesday...south winds 5 to 15 knots becoming southwest. a
chance of snow showers during the day, then snow showers
wednesday night. 
.thursday...northwest winds 10 knots or less becoming southwest.
snow showers during the day. 
.friday...south winds 5 to 10 knots. a chance of snow showers
friday night. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est mon dec 1 2025


slz024-012200-
saint lawrence river from ogdensburg to saint regis-
1002 am est mon dec 1 2025

.this afternoon...northwest winds 10 knots or less becoming west.
mostly sunny. 
.tonight...light and variable winds. a chance of snow showers
late. 
.tuesday...southeast winds less than 10 knots becoming northeast.
snow likely. 
.tuesday night...northeast winds less than 10 knots. a chance of
snow showers in the evening. 
.wednesday...south winds 5 to 15 knots becoming southwest 15 to
20 knots. a chance of snow showers during the day, then snow
showers wednesday night. 
.thursday...west winds 5 to 15 knots becoming southwest less than
10 knots. snow showers during the day. 
.friday...south winds 5 to 10 knots. a chance of snow showers
friday night. 

$$