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open lake forecast for lake ontario
national weather service buffalo ny
402 am est tue dec 23 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.


loz062-231600-
lake ontario open waters from the niagara river to hamlin beach-
402 am est tue dec 23 2025

.today...southeast winds 10 to 15 knots becoming west 15 to
20 knots. rain this morning, then a chance of rain showers early
this afternoon. waves 1 to 3 feet building to 3 to 5 feet. 
.tonight...west winds to 30 knots becoming northwest. waves 5 to
8 feet building to 6 to 9 feet. waves occasionally around
11 feet. 
.wednesday...northwest winds 15 to 25 knots becoming west and
diminishing to 5 to 10 knots in the afternoon. waves 5 to 8 feet
subsiding to 1 to 3 feet. waves occasionally around 10 feet. 
.wednesday night...west winds 5 to 10 knots becoming southwest.
waves 1 foot or less. 
.thursday...northwest winds 5 to 15 knots becoming northeast
15 to 20 knots. waves 2 feet or less building to 3 to 5 feet. 
.friday...east winds to 30 knots diminishing to 15 to 20 knots.
snow. waves 5 to 8 feet building to 6 to 10 feet, then subsiding
to 4 to 7 feet. waves occasionally around 13 feet. 
.saturday...east winds 10 to 15 knots becoming southeast. rain
likely saturday night. waves 3 to 5 feet subsiding to 2 to
4 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am est tue dec 23 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.


loz063-231600-
lake ontario open waters from hamlin beach to sodus bay-
402 am est tue dec 23 2025

.today...southeast winds 10 to 15 knots becoming west 15 to
20 knots. rain and snow this morning, then rain showers likely
early this afternoon. a chance of rain showers late. waves 1 to
3 feet building to 3 to 5 feet. 
.tonight...west winds to 30 knots becoming northwest. waves 5 to
8 feet building to 9 to 12 feet. waves occasionally around
15 feet. 
.wednesday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves 7 to 10 feet subsiding to 1 to 3 feet. waves
occasionally around 13 feet. 
.wednesday night...west winds 5 to 10 knots becoming southwest.
waves 1 to 2 feet. 
.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 likely. waves 3 to
6 feet building to 4 to 7 feet. waves occasionally around 9 feet.
.saturday...east winds 15 to 20 knots becoming southeast. a
chance of snow during the day, then a chance of rain saturday
night. waves 3 to 5 feet subsiding to 2 to 4 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am est tue dec 23 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.


loz064-065-231600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est tue dec 23 2025

.today...south winds 10 to 15 knots becoming southwest 15 to
20 knots. rain and snow this morning, then rain and snow showers
early this afternoon. rain showers likely late. waves 1 to 3 feet
building to 3 to 5 feet. 
.tonight...west winds to 30 knots becoming northwest. a chance of
rain showers. waves 5 to 8 feet building to 8 to 12 feet. waves
occasionally around 15 feet. 
.wednesday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves 8 to 11 feet subsiding to 1 to 3 feet. waves
occasionally around 14 feet. 
.wednesday night...west winds 5 to 15 knots becoming southwest.
waves 2 feet or less. 
.thursday...west winds 10 to 15 knots becoming northeast 15 to
20 knots. waves 1 to 2 feet building to 3 to 5 feet, then
subsiding to 2 to 4 feet. 
.friday...east winds 15 to 25 knots. snow likely. waves 2 to
4 feet building to 3 to 5 feet. 
.saturday...east winds 15 to 20 knots becoming southeast. a
chance of snow during the day, then rain likely saturday night.
waves 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 tue dec 23 2025


slz022-231600-
saint lawrence river from cape vincent to ogdensburg-
402 am est tue dec 23 2025

.today...southeast winds 10 knots or less becoming south. snow
this morning, then snow showers early this afternoon. snow
showers with a chance of rain showers late. 
.tonight...southwest winds 5 to 15 knots becoming northwest. rain
and snow showers likely early, then a chance of snow showers from
late evening on. 
.wednesday...northwest winds 5 to 15 knots becoming west less
than 10 knots. partly to mostly sunny. 
.wednesday night...light and variable winds. a chance of snow
showers overnight. 
.thursday...west winds 5 to 10 knots becoming north. mostly
cloudy. 
.friday...northeast winds 5 to 10 knots. a chance of snow during
the day, then snow likely friday night. 
.saturday...northeast winds 10 knots or less becoming east. a
chance of snow. 

$$