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open lake forecast for lake ontario
national weather service buffalo ny
402 am 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 29.7 inch low off the southern new england coast will 
strengthen to 29.1 inches while moving north across quebec by 
tuesday. another 29.2 inch low will move east across hudson bay 
wednesday. a 30.1 inch high will then build from the canadian 
prairies thursday to northwest ontario province friday while 
strengthening to 30.3 inches.


loz062-101600-
lake ontario open waters from the niagara river to hamlin beach-
402 am est mon nov 10 2025

.today...north winds 15 to 20 knots becoming northwest. a chance
of snow showers early, then snow showers likely late this
morning. a chance of snow showers this afternoon. waves 3 to
5 feet subsiding to 2 to 4 feet. 
.tonight...northwest winds 15 to 25 knots. a chance of snow
showers early, then snow showers likely. a chance of snow showers
late. waves 3 to 6 feet. 
.tuesday...northwest winds to 30 knots becoming west. a chance of
snow showers in the morning, then snow showers likely with a
chance of rain showers in the afternoon. waves 5 to 8 feet
building to 7 to 10 feet. waves occasionally around 13 feet. 
.tuesday night...west winds to 30 knots becoming southwest. lake
effect rain with a chance of lake effect snow showers in the
evening, then lake effect rain overnight. waves 6 to 10 feet.
waves occasionally around 13 feet. 
.wednesday...west gales to 35 knots. lake effect rain during the
day, then rain showers likely wednesday night. waves 8 to 12 feet
subsiding to 7 to 10 feet. waves occasionally around 15 feet. 
.thursday...west winds to 30 knots diminishing to 15 to 25 knots.
showers likely during the day, then a chance of showers thursday
night. waves 7 to 11 feet subsiding to 3 to 6 feet. waves
occasionally around 14 feet. 
.friday...west winds 10 to 15 knots becoming northeast. a chance
of rain showers during the day. waves 2 to 4 feet subsiding to
1 to 3 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am 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 29.7 inch low off the southern new england coast will 
strengthen to 29.1 inches while moving north across quebec by 
tuesday. another 29.2 inch low will move east across hudson bay 
wednesday. a 30.1 inch high will then build from the canadian 
prairies thursday to northwest ontario province friday while 
strengthening to 30.3 inches.


loz063>065-101600-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am est mon nov 10 2025

.today...north winds 15 to 20 knots becoming northwest. a chance
of snow showers through early afternoon, then snow showers likely
late. waves 2 to 4 feet. 
.tonight...northwest winds 15 to 25 knots. a chance of snow
showers in the evening, then snow showers likely after midnight.
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
showers likely. waves 5 to 8 feet building to 9 to 12 feet. waves
occasionally around 15 feet. 
.tuesday night...west winds to 30 knots becoming southwest. lake
effect rain with lake effect snow showers likely. waves 8 to
12 feet. waves occasionally around 15 feet. 
.wednesday...west gales to 35 knots diminishing to 30 knots. lake
effect rain. waves 8 to 11 feet building to 10 to 14 feet. waves
occasionally around 18 feet. 
.thursday...west winds to 30 knots diminishing to 15 to 20 knots.
rain showers. waves 8 to 12 feet subsiding to 5 to 8 feet. waves
occasionally around 15 feet. 
.friday...northwest winds 15 to 20 knots becoming north 10 to
15 knots. rain showers likely during the day, then a chance of
rain and snow showers friday night. waves 3 to 6 feet subsiding
to 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 am est mon nov 10 2025


slz022-101600-
saint lawrence river from cape vincent to ogdensburg-
402 am est mon nov 10 2025

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

$$