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open lake forecast for lake ontario
national weather service buffalo ny
1002 am est sat nov 15 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 29.3 inch low will track from lake superior this 
afternoon to central new england by early sunday morning. as the low 
tracks just north of the lake, it will push an attendant warm front 
across the lake this afternoon, followed by a cold front crossing 
the lake tonight. this low will deepen further to 28.9 inches over 
northern new england sunday before moving to the canadian maritimes 
monday, then north to labrador tuesday. a 30.3 inch high will then 
build from the upper great lakes tuesday to the lower great lakes 
wednesday, then to new england thursday.


loz062-152200-
lake ontario open waters from the niagara river to hamlin beach-
1002 am est sat nov 15 2025

...gale watch in effect from late tonight through late sunday
night...

.this afternoon...southeast winds 10 to 15 knots becoming south.
showers. waves 1 to 3 feet. 
.tonight...southwest winds 15 to 25 knots becoming northwest to
30 knots. showers early, then a chance of showers late in the
evening. a chance of showers late. waves 2 to 4 feet building to
10 to 13 feet. waves occasionally around 16 feet. 
.sunday...northwest gales to 35 knots diminishing to 30 knots. a
chance of rain showers in the morning, then a chance of rain and
snow showers in the afternoon. waves 10 to 13 feet. waves
occasionally around 16 feet. 
.sunday night...northwest winds to 30 knots. snow showers likely
in the evening, then a chance of snow and rain showers overnight.
waves 7 to 11 feet subsiding to 5 to 9 feet. waves occasionally
around 14 feet. 
.monday...northwest winds to 30 knots diminishing to 15 to
25 knots. a chance of rain and snow showers during the day. waves
5 to 9 feet subsiding to 3 to 5 feet. waves occasionally around
11 feet. 
.tuesday...northwest winds 15 to 20 knots becoming north 5 to
15 knots. waves 2 to 4 feet subsiding to 1 foot or less. 
.wednesday...northeast winds 5 to 10 knots becoming east. waves
1 foot or less. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am est sat nov 15 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 29.3 inch low will track from lake superior this 
afternoon to central new england by early sunday morning. as the low 
tracks just north of the lake, it will push an attendant warm front 
across the lake this afternoon, followed by a cold front crossing 
the lake tonight. this low will deepen further to 28.9 inches over 
northern new england sunday before moving to the canadian maritimes 
monday, then north to labrador tuesday. a 30.3 inch high will then 
build from the upper great lakes tuesday to the lower great lakes 
wednesday, then to new england thursday.


loz063-152200-
lake ontario open waters from hamlin beach to sodus bay-
1002 am est sat nov 15 2025

...gale watch in effect from late tonight through late sunday
night...

.this afternoon...southeast winds 10 to 15 knots increasing to
15 to 20 knots. showers. waves 1 to 3 feet. 
.tonight...southwest winds 15 to 25 knots becoming west and
increasing to 35 knot gales after midnight. showers in the
evening. a chance of showers late. waves 1 to 3 feet building to
11 to 15 feet. waves occasionally around 19 feet. 
.sunday...northwest gales to 35 knots. rain showers likely in the
morning, then rain showers likely with a chance of snow showers
in the afternoon. waves 11 to 16 feet. waves occasionally around
20 feet. 
.sunday night...northwest gales to 35 knots diminishing to
30 knots. a chance of snow and rain showers. waves 10 to 14 feet
subsiding to 8 to 11 feet. waves occasionally around 18 feet. 
.monday...northwest winds to 30 knots diminishing to 15 to
20 knots. a chance of rain and snow showers during the day, then
a chance of rain showers monday night. waves 7 to 11 feet
subsiding to 4 to 7 feet. waves occasionally around 14 feet. 
.tuesday...northwest winds 15 to 20 knots diminishing to 5 to
15 knots. a chance of rain and snow showers during the day. waves
3 to 5 feet subsiding to 1 to 3 feet. 
.wednesday...north winds 5 to 10 knots becoming southeast. waves
1 foot or less. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am est sat nov 15 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 29.3 inch low will track from lake superior this 
afternoon to central new england by early sunday morning. as the low 
tracks just north of the lake, it will push an attendant warm front 
across the lake this afternoon, followed by a cold front crossing 
the lake tonight. this low will deepen further to 28.9 inches over 
northern new england sunday before moving to the canadian maritimes 
monday, then north to labrador tuesday. a 30.3 inch high will then 
build from the upper great lakes tuesday to the lower great lakes 
wednesday, then to new england thursday.


loz064-065-152200-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 am est sat nov 15 2025

...gale watch in effect from late tonight through late sunday
night...

.this afternoon...southeast winds 10 to 15 knots increasing to
15 to 20 knots. a chance of rain showers early.
rain showers late. waves 1 to 3 feet building to 2 to 4 feet. 
.tonight...south winds 15 to 25 knots becoming west and
increasing to 35 knot gales after midnight. showers in the
evening, then a chance of showers after midnight. waves 2 to
4 feet building to 11 to 15 feet. waves occasionally around
19 feet. 
.sunday...northwest gales to 35 knots. rain showers in the
morning, then rain showers with snow showers likely in the
afternoon. waves 11 to 16 feet. waves occasionally around
20 feet. 
.sunday night...northwest gales to 35 knots diminishing to
30 knots. snow showers likely. waves 10 to 14 feet subsiding to
8 to 11 feet. waves occasionally around 18 feet. 
.monday...northwest winds to 30 knots diminishing to 15 to
25 knots. a chance of snow showers during the day, then a chance
of rain showers monday night. waves 7 to 11 feet subsiding to
5 to 8 feet. waves occasionally around 14 feet. 
.tuesday...northwest winds 15 to 20 knots diminishing to 5 to
15 knots. a chance of rain showers during the day. waves 3 to
6 feet subsiding to 1 to 3 feet. 
.wednesday...north winds 5 to 10 knots becoming southeast. waves
1 foot or less. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am est sat nov 15 2025


slz022-152200-
saint lawrence river from cape vincent to ogdensburg-
1002 am est sat nov 15 2025

.this afternoon...east winds less than 10 knots. rain showers
late. 
.tonight...east winds 5 to 15 knots becoming west. rain showers. 
.sunday...west winds 15 to 20 knots. rain and snow showers in the
morning, then snow showers in the afternoon. 
.sunday night...west winds 15 to 20 knots becoming northwest
10 to 15 knots. snow showers likely. 
.monday...west winds 5 to 15 knots. mostly cloudy. 
.tuesday...west winds 5 to 10 knots becoming light and variable.
mostly cloudy. 
.wednesday...northwest winds less than 10 knots. mostly cloudy. 

$$