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open lake forecast for lake ontario
national weather service buffalo ny
402 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 30.1 inch high will build over the ohio valley and 
lower great lakes through this evening. 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.


loz062-230400-
lake ontario open waters from the niagara river to hamlin beach-
402 pm est sat nov 22 2025

.tonight...west winds 5 to 15 knots becoming southwest. a chance
of rain showers after midnight. waves 2 feet or less. 
.sunday...south winds 10 to 15 knots becoming west and increasing
to 15 to 25 knots. a chance of rain showers. waves 1 to 3 feet
building to 5 to 7 feet. waves occasionally around 9 feet. 
.sunday night...west winds 15 to 25 knots becoming northwest. a
chance of showers in the evening. waves 5 to 8 feet subsiding to
3 to 6 feet. waves occasionally around 10 feet. 
.monday...west winds 5 to 15 knots becoming southwest. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.monday night...south winds 5 to 10 knots. waves 1 foot or less. 
.tuesday...south winds 5 to 10 knots becoming southwest. showers.
waves 1 foot or less. 
.wednesday...southwest winds 10 to 15 knots becoming west and
increasing to 30 knots. rain showers likely during the day, then
rain showers likely with a chance of snow showers wednesday
night. waves 1 to 2 feet building to 6 to 10 feet. waves
occasionally around 13 feet. 
.thursday...west winds to 30 knots. a chance of snow showers.
waves 8 to 12 feet. waves occasionally around 15 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 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 30.1 inch high will build over the ohio valley and 
lower great lakes through this evening. 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.


loz063-230400-
lake ontario open waters from hamlin beach to sodus bay-
402 pm est sat nov 22 2025

.tonight...northwest winds 5 to 15 knots becoming southwest. a
chance of rain showers late. waves 1 to 2 feet. 
.sunday...south winds 10 to 15 knots becoming west and increasing
to 15 to 25 knots. a chance of rain showers in the morning, then
rain showers likely early in the afternoon. a chance of rain
showers late. waves 1 to 3 feet building to 5 to 8 feet. waves
occasionally around 10 feet. 
.sunday night...west winds to 30 knots becoming northwest and
diminishing to 15 to 20 knots. 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 2 feet or less. 
.tuesday...south winds 10 to 15 knots. showers likely. waves 1 to
3 feet. 
.wednesday...southwest winds around 10 knots becoming west and
increasing to 30 knots. rain showers likely during the day, then
rain showers likely with a chance of snow showers wednesday
night. waves 1 to 2 feet building to 8 to 11 feet. waves
occasionally around 14 feet. 
.thursday...west winds to 30 knots. a chance of snow and rain
showers during the day, then snow showers likely thursday night.
waves 10 to 14 feet. waves occasionally around 18 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 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 30.1 inch high will build over the ohio valley and 
lower great lakes through this evening. 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.


loz064-065-230400-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 pm est sat nov 22 2025

.tonight...northwest 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
402 pm est sat nov 22 2025


slz022-230400-
saint lawrence river from cape vincent to ogdensburg-
402 pm est sat nov 22 2025

.tonight...west winds less than 10 knots. 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. 

$$