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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est sat nov 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 warm front will move across the lake tonight, 
increasing the potential for showers through the night. a 29.5 inch 
low will move from northern ontario to james bay sunday, sending its 
cold front across the lake through the afternoon hours. a 30.2 inch 
high is then forecast to build across the ohio valley monday. on 
tuesday a 29.5 inch low to the north of lake superior will swing a 
cold front across the lake by tuesday night. the surface low will 
then track well north of the lake wednesday and thursday.


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

.overnight...west winds 5 to 15 knots becoming southwest. a
chance of rain showers late. waves 2 feet or less. 
.sunday...south winds 15 to 25 knots becoming west. rain showers.
waves 1 to 3 feet building to 4 to 7 feet. waves occasionally
around 9 feet. 
.sunday night...west winds 15 to 25 knots becoming northwest.
rain showers likely. waves 5 to 9 feet. waves occasionally around
11 feet. 
.monday...northwest winds 15 to 20 knots becoming southwest 5 to
15 knots. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.monday night...south winds 5 to 15 knots. waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots diminishing to 10 to
15 knots. showers. waves 1 to 3 feet. 
.wednesday...south winds 10 to 15 knots becoming west and
increasing to 30 knots. rain showers during the day, then rain
showers with snow showers likely wednesday night. waves 1 to
2 feet building to 8 to 11 feet. waves occasionally around
14 feet. 
.thursday...west winds to 30 knots. rain and snow showers likely
during the day, then snow showers likely thursday night. waves
10 to 14 feet building to 11 to 15 feet. waves occasionally
around 19 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm est sat nov 22 2025


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

.overnight...light and variable winds. a chance of snow
showers late. 
.sunday...south winds 5 to 10 knots. snow and rain showers
through early afternoon, then rain showers likely late. 
.sunday night...southwest winds 5 to 10 knots becoming west. a
chance of rain and snow showers. 
.monday...west winds less than 10 knots becoming southwest.
partly to mostly sunny. 
.monday night...south winds 10 knots or less. mostly cloudy. 
.tuesday...south winds 10 knots or less becoming southeast. rain
showers likely. 
.wednesday...southeast winds 5 to 10 knots becoming southwest and
increasing to 15 to 20 knots. rain showers during the day, then
rain showers with a chance of snow showers wednesday night. 
.thursday...southwest winds 15 to 20 knots becoming west. snow
and rain showers likely during the day, then snow showers likely
thursday night. 

$$