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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est fri nov 28 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 over eastern quebec this evening 
will slide to newfoundland overnight. meanwhile, a 30.5 inch surface 
high will build south into the mid-mississippi valley tonight, then 
to the ohio valley and lower great lakes saturday. another surface 
low will cut northeastward through the central great lakes sunday, 
slowly deepening from 29.6 inches sunday morning to 29.4 inches 
sunday night over western quebec. a cold front from this low will 
cross the lake late sunday night. a 30.4 inch surface high centered 
over the central plains will then build east across the great lakes 
monday, sliding quickly to new england on tuesday. a 29.7 inch 
surface low off the carolina coastline tuesday morning will deepen 
to 28.9 inches over southern atlantic canada by wednesday.


loz064-065-290400-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 pm est fri nov 28 2025

...gale warning in effect until 7 pm est this evening...

.tonight...northwest gales to 35 knots diminishing to 30 knots. a
chance of snow showers early. waves 10 to 14 feet subsiding to
7 to 10 feet. waves occasionally around 18 feet. 
.saturday...northwest winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. waves 5 to 8 feet subsiding to
2 to 4 feet. waves occasionally around 10 feet. 
.saturday night...west winds 5 to 15 knots becoming southeast and
increasing to 30 knots overnight. snow showers overnight. waves
1 to 3 feet building to 3 to 6 feet. 
.sunday...south winds to 30 knots becoming southwest and
increasing to 40 knot gales in the afternoon. snow and rain
showers. waves 5 to 8 feet building to 10 to 13 feet. waves
occasionally around 16 feet. 
.sunday night...southwest gales to 35 knots becoming northwest
and diminishing to 30 knots overnight. rain and snow showers.
waves 10 to 15 feet. waves occasionally around 19 feet. 
.monday...northwest winds to 30 knots becoming south and
diminishing to 15 to 20 knots. snow showers likely during the
day, then a chance of snow showers monday night. waves 9 to
12 feet subsiding to 1 to 3 feet. waves occasionally around
15 feet. 
.tuesday...south winds 15 to 20 knots becoming north 10 to
15 knots. snow showers likely. waves 1 to 3 feet. 
.wednesday...west winds 10 to 15 knots becoming southwest and
increasing to 30 knots. a chance of snow showers during the day,
then snow showers likely wednesday night. waves 1 to 3 feet
building to 5 to 9 feet. waves occasionally around 11 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est fri nov 28 2025


slz022-290400-
saint lawrence river from cape vincent to ogdensburg-
402 pm est fri nov 28 2025

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

$$