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open lake forecast for lake ontario
national weather service buffalo ny
402 am est fri nov 21 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 29.5 inch surface low near james bay will swing a cold 
front through the lower great lakes today, with a 30.1 inch high 
building over the ohio valley and lower great lakes saturday. a 29.5 
inch low will then 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.


loz062-211600-
lake ontario open waters from the niagara river to hamlin beach-
402 am est fri nov 21 2025

.today...southwest winds 15 to 25 knots becoming west. waves 3 to
6 feet. 
.tonight...west winds 10 to 15 knots becoming northwest. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.saturday...northwest winds 5 to 10 knots becoming west. waves
1 to 2 feet. 
.saturday night...west winds 5 to 15 knots becoming southwest.
waves 1 to 2 feet. 
.sunday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 2 to 4 feet building to 3 to 5 feet, then
subsiding to 2 to 4 feet. 
.monday...west winds 5 to 10 knots becoming southeast. a chance
of showers monday night. waves 1 to 3 feet subsiding to 1 foot or
less. 
.tuesday...southeast winds 10 to 15 knots becoming southwest.
showers. waves 1 to 2 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am est fri nov 21 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 29.5 inch surface low near james bay will swing a cold 
front through the lower great lakes today, with a 30.1 inch high 
building over the ohio valley and lower great lakes saturday. a 29.5 
inch low will then 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.


loz063-211600-
lake ontario open waters from hamlin beach to sodus bay-
402 am est fri nov 21 2025

.today...southwest winds 15 to 25 knots becoming west to
30 knots. a chance of showers this morning. waves 3 to 6 feet
building to 4 to 7 feet. waves occasionally around 9 feet. 
.tonight...west winds 15 to 20 knots becoming northwest 10 to
15 knots. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.saturday...northwest winds 10 to 15 knots. waves 1 to 3 feet. 
.saturday night...northwest winds 10 to 15 knots becoming
southwest. waves 1 to 2 feet. 
.sunday...southwest winds 15 to 20 knots becoming west. a chance
of rain showers during the day. waves 1 to 3 feet building to
3 to 5 feet. 
.monday...west winds 5 to 15 knots becoming southeast. waves 2 to
4 feet subsiding to 1 to 2 feet. 
.tuesday...southeast winds 10 to 15 knots becoming south. showers
likely. waves 1 to 3 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am est fri nov 21 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 29.5 inch surface low near james bay will swing a cold 
front through the lower great lakes today, with a 30.1 inch high 
building over the ohio valley and lower great lakes saturday. a 29.5 
inch low will then 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.


loz064-065-211600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est fri nov 21 2025

.today...southwest winds 15 to 25 knots becoming west. a chance
of showers this morning. waves 3 to 5 feet building to 4 to
7 feet. waves occasionally around 9 feet. 
.tonight...west winds 15 to 20 knots becoming northwest 10 to
15 knots. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.saturday...northwest winds 5 to 15 knots. waves 1 to 3 feet. 
.saturday night...northwest winds 5 to 10 knots becoming
southwest. waves 2 feet or less. 
.sunday...southwest winds 15 to 20 knots becoming northwest. a
chance of rain showers. waves 1 to 3 feet building to 3 to
6 feet. 
.monday...west winds 5 to 15 knots becoming southeast. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tuesday...southeast winds 15 to 20 knots becoming south.
showers. waves 1 to 3 feet building to 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 fri nov 21 2025


slz022-211600-
saint lawrence river from cape vincent to ogdensburg-
402 am est fri nov 21 2025

.today...south winds 15 to 20 knots becoming southwest 5 to
15 knots. a chance of rain showers early, then rain showers
likely late this morning. a chance of rain showers early this
afternoon. 
.tonight...west winds 10 knots or less. partly cloudy. 
.saturday...northwest winds less than 10 knots becoming west.
mostly sunny. 
.saturday night...light and variable winds. partly cloudy in the
evening, then becoming mostly cloudy. 
.sunday...southwest winds 10 knots or less becoming west. a
chance of rain and snow showers during the day, then a chance of
rain showers sunday night. 
.monday...west winds 10 knots or less becoming south. partly
cloudy, then becoming mostly cloudy. 
.tuesday...southeast winds 5 to 10 knots becoming south. rain
showers likely. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
927 am est fri nov 21 2025

for waters beyond five nautical miles of shore on lake erie

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 cold front will move east across lake erie this morning as high
pressure 30.20 inches building over the great lakes in its wake
late tonight into saturday. a warm front lift across the lake 
late saturday into sunday, followed by another cold front on late 
sunday into early monday.


lez061-168-169-212115-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
927 am est fri nov 21 2025

.this afternoon...southwest winds 15 to 20 knots becoming west
10 to 15 knots. waves 3 to 5 feet. 
.tonight...west winds 5 to 15 knots becoming north. waves 2 to
4 feet subsiding to 1 to 2 feet. 
.saturday...north winds 5 to 10 knots becoming northwest. waves
1 foot or less. 
.saturday night...west winds 5 to 15 knots becoming southwest
15 to 20 knots. waves 1 to 3 feet. 
.sunday...southwest winds 15 to 20 knots becoming west and
diminishing to around 10 knots. waves 3 to 6 feet subsiding to
2 to 3 feet. 
.monday...southwest winds 5 to 15 knots becoming south. a chance
of rain monday night. waves 2 feet or less. 
.tuesday...south winds 10 to 15 knots becoming southwest 15 to
20 knots. rain. waves 1 to 3 feet building to 2 to 4 feet. 

$$