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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est mon dec 22 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 large 30.6 inch high will build east across the lake 
tonight, then slide to the atlantic coastline monday. a 29.8 inch 
low just north of lake superior tuesday will pass north of the lake, 
resulting in a pair of fronts passing across the region. following 
the passage of this system, a 30.4 inch high will then build across 
the lake wednesday, sliding off the atlantic coastline thursday.


loz064-065-231000-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 pm est mon dec 22 2025

.rest of tonight...west winds 10 to 15 knots becoming south. a
chance of rain and snow showers, then rain and snow late. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...south winds 10 to 15 knots becoming southwest 15 to
20 knots. snow and rain through early afternoon, then a chance of
rain showers late. waves 1 to 3 feet building to 2 to 4 feet. 
.tuesday night...west winds 15 to 25 knots becoming northwest to
30 knots. a chance of rain showers in the evening, then a chance
of rain and snow showers overnight. waves 4 to 7 feet building to
7 to 11 feet. waves occasionally around 14 feet. 
.wednesday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. a chance of snow showers in the morning. waves 7 to
10 feet subsiding to 2 to 4 feet. waves occasionally around
13 feet. 
.wednesday night...northwest winds 5 to 15 knots becoming south.
waves 2 feet or less. 
.thursday...west winds 10 to 15 knots becoming northeast 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.friday...east winds 15 to 25 knots. snow. waves 2 to 4 feet
building to 3 to 6 feet. 
.saturday...southeast winds 15 to 25 knots. a chance of rain and
snow showers during the day, then rain showers likely saturday
night. waves 2 to 4 feet building to 3 to 5 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 22 2025


slz022-231000-
saint lawrence river from cape vincent to ogdensburg-
1002 pm est mon dec 22 2025

.overnight...southwest winds less than 10 knots. a chance
of snow showers late. 
.tuesday...southeast winds 10 knots or less becoming south. snow
through early afternoon, then snow with a chance of rain showers
late. 
.tuesday night...southwest winds 5 to 15 knots becoming west.
snow and rain likely in the evening, then a chance of snow and
rain showers overnight. 
.wednesday...northwest winds 10 knots or less. a chance of snow
showers in the morning. 
.wednesday night...light and variable winds. mostly cloudy. 
.thursday...west winds 10 knots or less becoming northeast.
mostly cloudy. 
.friday...northeast winds 5 to 10 knots. snow likely. 
.saturday...northeast winds 5 to 15 knots becoming southeast. a
chance of snow showers. 

$$