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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est fri dec 12 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 29.6 inch low will move from just north of the soo 
tonight to southern quebec by saturday night while weakening to 29.9 
inches, all while dragging an attendant cold front across the lake 
on saturday. a strong 30.8 inch high over the mid mississippi valley 
sunday will then settle across the southeast states monday and 
tuesday while weakening to 30.3 inches.


loz062-131000-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm est fri dec 12 2025

.rest of tonight...southwest winds 15 to 20 knots. a chance of
snow showers late this evening, then snow showers likely after
midnight. lake effect snow late. waves 3 to 6 feet subsiding to
2 to 4 feet. 
.saturday...southwest winds to 30 knots becoming west. lake
effect snow early, then snow showers likely late in the morning.
a chance of snow showers early in the afternoon. waves 3 to
6 feet building to 8 to 11 feet. waves occasionally around
14 feet. 
.saturday night...west winds 15 to 25 knots. snow showers likely
overnight. waves 5 to 9 feet subsiding to 4 to 6 feet. waves
occasionally around 11 feet. 
.sunday...west winds 15 to 20 knots becoming northwest. lake
effect snow showers likely. waves 3 to 6 feet. 
.sunday night...northwest winds 15 to 20 knots diminishing to
10 to 15 knots. a chance of snow showers. waves 3 to 5 feet
subsiding to 2 to 4 feet. 
.monday...west winds 15 to 25 knots. lake effect snow showers
likely. waves 2 to 4 feet building to 6 to 10 feet, then
subsiding to 5 to 8 feet. waves occasionally around 13 feet. 
.tuesday...west winds 10 to 15 knots becoming southwest and
increasing to 30 knots. waves 3 to 5 feet building to 5 to
8 feet. waves occasionally around 10 feet. 
.wednesday...southwest winds to 30 knots becoming south and
diminishing to 15 to 20 knots. a chance of rain showers wednesday
night. waves 5 to 9 feet subsiding to 2 to 4 feet. waves
occasionally around 11 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est fri dec 12 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 29.6 inch low will move from just north of the soo 
tonight to southern quebec by saturday night while weakening to 29.9 
inches, all while dragging an attendant cold front across the lake 
on saturday. a strong 30.8 inch high over the mid mississippi valley 
sunday will then settle across the southeast states monday and 
tuesday while weakening to 30.3 inches.


loz063-131000-
lake ontario open waters from hamlin beach to sodus bay-
1002 pm est fri dec 12 2025

.rest of tonight...southwest winds 15 to 20 knots. a chance of
snow showers late. waves 4 to 7 feet subsiding to 3 to 6 feet.
waves occasionally around 9 feet. 
.saturday...southwest winds to 30 knots becoming west. snow
showers likely through early afternoon, then a chance of snow
showers late. waves 3 to 5 feet building to 9 to 13 feet. waves
occasionally around 16 feet. 
.saturday night...west winds to 30 knots diminishing to 15 to
20 knots. a chance of snow showers in the evening, then lake
effect snow overnight. waves 9 to 12 feet subsiding to 4 to
7 feet. waves occasionally around 15 feet. 
.sunday...west winds 15 to 20 knots becoming northwest. lake
effect snow showers. waves 4 to 7 feet. waves occasionally around
9 feet. 
.sunday night...northwest winds 15 to 20 knots. snow showers
likely in the evening, then a chance of snow showers overnight.
waves 3 to 6 feet. 
.monday...west winds 15 to 25 knots. lake effect snow showers
likely. waves 2 to 4 feet building to 5 to 9 feet. waves
occasionally around 11 feet. 
.tuesday...west winds 15 to 20 knots becoming southwest. a chance
of snow showers during the day. waves 4 to 7 feet subsiding to
3 to 5 feet. waves occasionally around 9 feet. 
.wednesday...southwest winds to 30 knots becoming south and
diminishing to 15 to 20 knots. waves 5 to 8 feet subsiding to
1 to 3 feet. waves occasionally around 10 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est fri dec 12 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 29.6 inch low will move from just north of the soo 
tonight to southern quebec by saturday night while weakening to 29.9 
inches, all while dragging an attendant cold front across the lake 
on saturday. a strong 30.8 inch high over the mid mississippi valley 
sunday will then settle across the southeast states monday and 
tuesday while weakening to 30.3 inches.


loz064-065-131000-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 pm est fri dec 12 2025

.rest of tonight...west winds 15 to 20 knots becoming southwest.
a chance of snow showers. waves 4 to 7 feet subsiding to 3 to
6 feet. waves occasionally around 9 feet. 
.saturday...south winds to 30 knots becoming west. snow showers
likely early, then lake effect snow from late morning on. waves
3 to 6 feet building to 9 to 13 feet. waves occasionally around
16 feet. 
.saturday night...west winds to 30 knots diminishing to 15 to
20 knots. lake effect snow. waves 9 to 12 feet subsiding to 5 to
8 feet. waves occasionally around 15 feet. 
.sunday...northwest winds 15 to 20 knots. lake effect snow
showers. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.sunday night...northwest winds 15 to 25 knots. snow showers
likely in the evening, then a chance of snow showers overnight.
waves 3 to 6 feet. 
.monday...northwest winds 15 to 25 knots becoming west. lake
effect snow showers. waves 2 to 4 feet building to 6 to 9 feet.
waves occasionally around 11 feet. 
.tuesday...west winds 15 to 25 knots becoming south. snow showers
likely during the day. waves 4 to 7 feet subsiding to 3 to
6 feet. waves occasionally around 9 feet. 
.wednesday...southwest winds 15 to 25 knots becoming south. a
chance of rain showers wednesday night. waves 5 to 8 feet
subsiding to 2 to 4 feet. waves occasionally around 10 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm est fri dec 12 2025


slz022-131000-
saint lawrence river from cape vincent to ogdensburg-
1002 pm est fri dec 12 2025

.overnight...southwest winds 10 knots or less becoming
south. a chance of snow showers, then snow showers likely late. 
.saturday...south winds 10 to 15 knots becoming southwest. snow
showers likely early, then lake effect snow. a chance of snow
showers late. 
.saturday night...southwest winds 10 knots or less becoming west.
mostly cloudy. 
.sunday...northwest winds 10 knots or less. a chance of snow
showers. 
.sunday night...northwest winds 5 to 10 knots becoming west.
partly to mostly cloudy. 
.monday...west winds less than 10 knots becoming southwest 5 to
15 knots. lake effect snow showers likely. 
.tuesday...southwest winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. a chance of snow showers during the
day. 
.wednesday...southwest winds 15 to 20 knots becoming south 10 to
15 knots. a chance of rain and snow showers during the day. 

$$