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open lake forecast for lake ontario
national weather service buffalo ny
402 am est mon nov 24 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 30.2 inch high will build across the ohio valley 
today. on tuesday, a 29.5 inch low over the upper midwest will track 
toward the central great lakes. this low will then track into 
eastern ontario through wednesday night, swinging a cold front 
across the lake by later wednesday. the surface low will then track 
well north of the lake thursday and friday.


loz064-065-241600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est mon nov 24 2025

.today...northwest winds 15 to 20 knots becoming southwest 5 to
15 knots. waves 3 to 6 feet subsiding to 2 feet or less. 
.tonight...south winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet. 
.tuesday...south winds 10 to 15 knots. showers likely in the
afternoon. waves 1 to 3 feet. 
.tuesday night...southeast winds 10 to 15 knots. showers. waves
1 to 3 feet. 
.wednesday...south winds 10 to 15 knots becoming southwest and
increasing to 30 knots. rain showers during the day, then rain
showers with snow showers likely wednesday night. waves 1 to
3 feet building to 10 to 14 feet. waves occasionally around
18 feet. 
.thursday...southwest gales to 35 knots becoming west. snow
showers with rain showers likely during the day, then snow
showers thursday night. waves 11 to 15 feet building to 12 to
17 feet. waves occasionally around 22 feet. 
.friday...northwest winds to 30 knots diminishing to 15 to
25 knots. snow showers. waves 10 to 14 feet subsiding to 6 to
9 feet. waves occasionally around 18 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est mon nov 24 2025


slz022-241600-
saint lawrence river from cape vincent to ogdensburg-
402 am est mon nov 24 2025

.today...northwest winds 5 to 15 knots becoming southwest. partly
sunny. 
.tonight...south winds 5 to 10 knots. cloudy.
.tuesday...south winds 5 to 10 knots. a chance of rain showers in
the afternoon. 
.tuesday night...southeast winds less than 10 knots. rain showers
likely. 
.wednesday...southeast winds 5 to 15 knots becoming southwest and
increasing to 15 to 25 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. a
chance of snow and rain showers during the day, then a chance of
snow showers thursday night. 
.friday...west winds 15 to 20 knots diminishing to 5 to 15 knots.
a chance of snow showers during the day. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est mon nov 24 2025


slz024-241600-
saint lawrence river from ogdensburg to saint regis-
402 am est mon nov 24 2025

.today...northwest winds 5 to 15 knots becoming southwest. mostly
cloudy. 
.tonight...south winds 5 to 10 knots becoming southwest. cloudy.
.tuesday...southwest winds 10 knots or less becoming southeast. a
chance of rain showers in the afternoon. 
.tuesday night...light and variable winds. rain showers likely. 
.wednesday...east winds 10 knots or less 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. a
chance of snow showers. 
.friday...west winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of snow showers during the day. 

$$