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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est sat nov 8 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 29.9 inch high will persist across the lake tonight. a 
29.7 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. 
west-northwest flow will persist across the eastern great lakes 
region thursday, while a 30.2 inch high moves from the northern 
plains to the southern ohio valley.


loz063>065-090400-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm est sat nov 8 2025

.tonight...north winds 5 to 15 knots becoming northeast 15 to
20 knots. a chance of rain late this evening. rain after
midnight, then rain and snow late. waves 2 feet or less building
to 2 to 4 feet. 
.sunday...northeast winds 15 to 25 knots increasing to 30 knots.
rain. waves 3 to 6 feet building to 6 to 9 feet. waves
occasionally around 11 feet. 
.sunday night...northeast winds to 30 knots becoming north and
diminishing to 15 to 20 knots. rain and snow showers in the
evening, then snow and rain showers overnight. waves 5 to 9 feet
subsiding to 3 to 6 feet. waves occasionally around 11 feet. 
.monday...north winds 15 to 20 knots becoming northwest. snow
showers. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.monday night...northwest winds 15 to 25 knots becoming west.
snow showers. waves 2 to 4 feet building to 3 to 6 feet. 
.tuesday...northwest winds to 30 knots becoming southwest. rain
and snow showers. waves 7 to 10 feet building to 9 to 13 feet.
waves occasionally around 16 feet. 
.wednesday...west gales to 35 knots diminishing to 30 knots. rain
showers. waves 8 to 11 feet building to 10 to 14 feet. waves
occasionally around 18 feet. 
.thursday...west gales to 35 knots diminishing to 15 to 25 knots.
rain showers. waves 10 to 14 feet subsiding to 7 to 10 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 pm est sat nov 8 2025


slz022-090400-
saint lawrence river from cape vincent to ogdensburg-
402 pm est sat nov 8 2025

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

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est sat nov 8 2025


slz024-090400-
saint lawrence river from ogdensburg to saint regis-
402 pm est sat nov 8 2025

.tonight...light and variable winds. a chance of snow late. 
.sunday...northeast winds 5 to 15 knots. snow through early
afternoon, then freezing rain and snow late. 
.sunday night...northeast winds 5 to 15 knots becoming northwest.
snow, freezing rain with a chance of rain showers in the evening,
then snow showers overnight. 
.monday...west winds 5 to 10 knots. snow showers. 
.monday night...west winds 5 to 10 knots. snow showers likely. 
.tuesday...west winds 5 to 15 knots becoming southwest. snow
showers. 
.wednesday...south winds 5 to 10 knots becoming west. rain and
snow showers during the day, then rain showers with a chance of
snow showers wednesday night. 
.thursday...west winds 10 knots or less. rain and snow showers
likely during the day, then a chance of snow showers thursday
night. 

$$