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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est mon nov 10 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 29.4 inch low along the new england coast this evening 
will move north across quebec overnight through tuesday while 
deepening to 28.9 inches. this low will then exit northeast across 
labrador wednesday. another 29.2 inch low will develop south of nova 
scotia thursday, then move north across the canadian maritimes 
friday, remaining in place through saturday. meanwhile, a 30.1 inch 
high will then build from northwest ontario province friday to james 
bay and the lower great lakes by saturday.


loz063>065-110400-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm est mon nov 10 2025

.tonight...northwest winds 15 to 25 knots. snow. waves 2 to
4 feet building to 5 to 8 feet. waves occasionally around
10 feet. 
.tuesday...northwest winds to 30 knots becoming west. snow likely
in the morning, then a chance of snow and rain early in the
afternoon. a chance of rain late. waves 6 to 10 feet building to
8 to 12 feet. waves occasionally around 15 feet. 
.tuesday night...west winds to 30 knots becoming southwest. rain
in the evening, then rain and snow overnight. waves 7 to 11 feet.
waves occasionally around 14 feet. 
.wednesday...southwest winds to 30 knots becoming west. rain and
snow in the morning, then rain in the afternoon. waves 6 to
10 feet building to 8 to 11 feet. waves occasionally around
14 feet. 
.wednesday night...west winds to 30 knots. rain. waves 8 to
12 feet. waves occasionally around 15 feet. 
.thursday...west winds to 30 knots becoming northwest 15 to
25 knots. rain showers. waves 8 to 11 feet subsiding to 4 to
7 feet. waves occasionally around 14 feet. 
.friday...northwest winds 10 to 15 knots becoming north. a chance
of rain showers during the day. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.saturday...northeast winds 5 to 15 knots becoming southeast. a
chance of rain showers saturday night. waves 1 to 3 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est mon nov 10 2025


slz022-110400-
saint lawrence river from cape vincent to ogdensburg-
402 pm est mon nov 10 2025

.tonight...west winds 5 to 10 knots. a chance of snow showers
from late evening on. 
.tuesday...west winds 5 to 10 knots. a chance of snow showers
early, then snow. 
.tuesday night...west winds 5 to 15 knots becoming southwest.
snow likely in the evening, then snow and rain overnight. 
.wednesday...south winds 5 to 15 knots becoming southwest. rain
and snow. 
.wednesday night...southwest winds 5 to 10 knots becoming west.
rain in the evening, then rain with snow likely overnight. 
.thursday...west winds 10 knots or less. rain and snow showers
likely during the day, then a chance of rain and snow showers
thursday night. 
.friday...northwest winds less than 10 knots becoming north. a
chance of snow and rain showers during the day. 
.saturday...north winds less than 10 knots becoming southeast. a
chance of snow showers saturday night. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est mon nov 10 2025


slz024-110400-
saint lawrence river from ogdensburg to saint regis-
402 pm est mon nov 10 2025

.tonight...west winds 5 to 15 knots. snow likely early, then a
chance of snow showers from late evening on. 
.tuesday...west winds 10 to 15 knots. snow through early
afternoon, then a chance of snow showers late. 
.tuesday night...west winds 5 to 10 knots becoming southwest. a
chance of snow showers in the evening, then snow overnight. 
.wednesday...south winds 5 to 10 knots becoming southwest. snow
and rain. 
.wednesday night...southwest winds 10 knots or less becoming
west. rain likely in the evening, then rain and snow overnight. 
.thursday...west winds 10 knots or less. rain and snow showers
likely during the day, then a chance of snow showers thursday
night. 
.friday...west winds less than 10 knots. a chance of snow showers
during the day. 
.saturday...northwest winds less than 10 knots. a chance of snow
showers saturday night. 

$$