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


loz063-011600-
lake ontario open waters from hamlin beach to sodus bay-
402 am est mon dec 1 2025

.today...northwest winds 15 to 25 knots becoming west and
diminishing to 5 to 15 knots. waves 6 to 9 feet subsiding to 1 to
2 feet. waves occasionally around 11 feet. 
.tonight...southwest winds 10 knots or less becoming southeast
10 to 15 knots. snow showers likely late. waves 2 feet or less. 
.tuesday...southeast winds 5 to 15 knots becoming north. snow
likely in the morning, then a chance of snow showers in the
afternoon. waves 2 feet or less. 
.tuesday night...north winds 10 to 15 knots becoming west. a
chance of snow showers in the evening. waves 1 to 2 feet. 
.wednesday...southwest winds 15 to 25 knots becoming west. snow
showers wednesday night. waves 2 to 4 feet building to 6 to
9 feet. waves occasionally around 11 feet. 
.thursday...northwest winds to 30 knots becoming west and
diminishing to 10 to 15 knots. snow showers during the day. waves
5 to 9 feet subsiding to 2 to 4 feet. waves occasionally around
11 feet. 
.friday...southwest winds 15 to 20 knots becoming south. a chance
of snow showers friday night. waves 2 to 4 feet subsiding to 1 to
3 feet. 

$$

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


loz064-065-011600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est mon dec 1 2025

.today...northwest winds 15 to 20 knots becoming west 5 to
15 knots. waves 6 to 9 feet subsiding to 2 feet or less. waves
occasionally around 11 feet. 
.tonight...southwest winds 10 knots or less becoming southeast
10 to 15 knots. snow showers 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
402 am est mon dec 1 2025


slz022-011600-
saint lawrence river from cape vincent to ogdensburg-
402 am est mon dec 1 2025

.today...northwest winds 10 to 15 knots becoming light and
variable. partly sunny early, then becoming 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
402 am est mon dec 1 2025


slz024-011600-
saint lawrence river from ogdensburg to saint regis-
402 am est mon dec 1 2025

.today...northwest winds 5 to 15 knots becoming west less than
10 knots. partly sunny early, then becoming 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. 

$$