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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est fri nov 7 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 over northern ontario will slowly deepen 
to 29.2 inches as it makes its way to western and central quebec 
tonight, with its trailing cold front crossing the lake tonight. 
another 29.8 inch surface low will deepen to 29.5 inches as it 
tracks from the ohio valley to new england sunday and monday, then 
will strengthen further while moving north across quebec tuesday. 
another 29.2 inch low will move north of the great lakes region 
wednesday.


loz063>065-081000-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm est fri nov 7 2025

.overnight...southwest winds 15 to 25 knots becoming west.
a chance of showers. waves 5 to 8 feet building to 6 to 9 feet.
waves occasionally around 11 feet. 
.saturday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves 6 to 9 feet subsiding to 1 to 3 feet. waves
occasionally around 11 feet. 
.saturday night...north winds 10 knots or less becoming east
10 to 15 knots. a chance of rain showers in the evening, then
rain showers overnight. waves 2 feet or less. 
.sunday...east winds 15 to 25 knots becoming north. rain showers.
waves 2 to 4 feet building to 3 to 6 feet. 
.sunday night...north winds 15 to 25 knots becoming northwest.
rain showers in the evening, then rain showers with snow showers
likely overnight. waves 3 to 6 feet. 
.monday...northwest winds 15 to 25 knots becoming west. snow and
rain showers likely during the day, then snow showers monday
night. waves 3 to 6 feet building to 6 to 9 feet. waves
occasionally around 11 feet. 
.tuesday...west winds to 30 knots becoming southwest and
increasing to 35 knot gales. snow showers with rain showers
likely during the day, then rain showers tuesday night. waves
9 to 12 feet building to 10 to 15 feet, then subsiding to 9 to
12 feet. waves occasionally around 19 feet. 
.wednesday...southwest gales to 35 knots becoming west and
diminishing to 30 knots. rain showers. waves 10 to 14 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
1002 pm est fri nov 7 2025


slz022-081000-
saint lawrence river from cape vincent to ogdensburg-
1002 pm est fri nov 7 2025

.rest of tonight...southwest winds 15 to 20 knots becoming west.
a chance of showers late this evening, then showers likely after
midnight. a chance of showers late. 
.saturday...northwest winds 5 to 15 knots becoming north less
than 10 knots. a chance of rain showers early. 
.saturday night...light and variable winds. snow and rain showers
likely overnight. 
.sunday...northeast winds 5 to 10 knots. snow and rain showers. 
.sunday night...north winds 5 to 10 knots becoming northwest.
rain and snow showers. 
.monday...west winds 5 to 10 knots. snow showers likely. 
.tuesday...west winds 10 to 15 knots becoming southwest. snow and
rain showers. 
.wednesday...southwest winds 5 to 15 knots becoming west. rain
and snow showers during the day, then rain showers wednesday
night. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm est fri nov 7 2025


slz024-081000-
saint lawrence river from ogdensburg to saint regis-
1002 pm est fri nov 7 2025

.rest of tonight...southwest winds 10 to 15 knots becoming west.
a chance of showers late this evening, then showers likely after
midnight. a chance of showers late. 
.saturday...northwest winds 5 to 15 knots. a chance of rain
showers early. 
.saturday night...light and variable winds. a chance of snow
showers overnight. 
.sunday...northeast winds 5 to 10 knots. snow showers in the
morning, then rain and snow showers in the afternoon. 
.sunday night...northeast winds 5 to 10 knots becoming west. rain
and snow showers. 
.monday...west winds 5 to 10 knots becoming southwest. snow
showers. 
.tuesday...west winds 10 to 15 knots becoming southwest. snow
showers likely during the day, then snow and rain showers likely
tuesday night. 
.wednesday...southwest winds 5 to 15 knots. rain showers with
snow showers likely during the day, then rain showers wednesday
night. 

$$