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open lake forecast for lake ontario
national weather service buffalo ny
1236 pm 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.


loz064-065-152215-
lake ontario open waters from sodus bay to the saint lawrence
river-
1236 pm est sat nov 15 2025

...gale warning in effect from midnight est tonight through late
sunday night...

.this afternoon...southeast winds 15 to 20 knots. rain showers
likely early, then rain showers late. waves 1 to
3 feet building to 2 to 4 feet. 
.tonight...south winds 15 to 20 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...west gales to 35 knots becoming northwest. rain showers
in the morning, then snow and rain showers likely in the
afternoon. waves 11 to 16 feet. waves occasionally around
20 feet. 
.sunday night...northwest gales to 35 knots. snow showers likely
in the evening, then a chance of snow showers overnight. waves
10 to 14 feet subsiding to 8 to 11 feet. waves occasionally
around 18 feet. 
.monday...northwest winds to 30 knots. a chance of snow showers.
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 and snow showers. waves 3 to 6 feet
subsiding to 1 to 3 feet. 
.wednesday...northwest winds 5 to 10 knots becoming east. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

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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. 

$$

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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


slz024-152200-
saint lawrence river from ogdensburg to saint regis-
1002 am est sat nov 15 2025

.this afternoon...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. 

$$