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open lake forecast for lake ontario
national weather service buffalo ny
402 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 29.2 inch low will track from near the soo this 
morning 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.


loz064-065-151600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est sat nov 15 2025

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

.today...southeast winds 5 to 15 knots increasing to 15 to
20 knots. a chance of rain showers early this afternoon. 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
402 am est sat nov 15 2025


slz022-151600-
saint lawrence river from cape vincent to ogdensburg-
402 am est sat nov 15 2025

.today...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. a chance of snow showers
during the day. 
.tuesday...west winds 5 to 10 knots becoming light and variable.
mostly cloudy. 
.wednesday...northwest winds less than 10 knots. mostly cloudy. 

$$

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


slz024-151600-
saint lawrence river from ogdensburg to saint regis-
402 am est sat nov 15 2025

.today...light and variable winds. rain showers likely late. 
.tonight...east winds 10 knots or less becoming west. rain
showers. 
.sunday...west winds 15 to 20 knots. snow and rain showers in the
morning, then snow showers in the afternoon. 
.sunday night...west winds 15 to 20 knots. snow showers likely. 
.monday...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of snow showers during the day. 
.tuesday...west winds 5 to 10 knots becoming light and variable.
mostly cloudy. 
.wednesday...west winds less than 10 knots. mostly cloudy. 

$$