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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est tue nov 11 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 29.0 inch low will linger over eastern quebec today, 
deepening to 28.2 inches at it then slowly advances towards 
newfoundland 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.


loz062-120400-
lake ontario open waters from the niagara river to hamlin beach-
402 pm est tue nov 11 2025

.tonight...west winds 20 to 25 knots becoming southwest. rain
this evening, then rain and snow after midnight. waves 5 to
8 feet. waves occasionally around 10 feet. 
.wednesday...southwest winds to 30 knots becoming west. rain in
the morning, then rain showers in the afternoon. waves 5 to
8 feet building to 6 to 10 feet. waves occasionally around
13 feet. 
.wednesday night...west winds to 30 knots. showers. waves 6 to
9 feet. waves occasionally around 11 feet. 
.thursday...west winds 20 to 25 knots. showers likely. waves 5 to
8 feet. waves occasionally around 10 feet. 
.thursday night...west winds 15 to 20 knots. a chance of showers.
waves 4 to 7 feet subsiding to 2 to 4 feet. waves occasionally
around 9 feet. 
.friday...northwest winds 5 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.
rain likely saturday night. waves 1 to 3 feet. 
.sunday...southwest winds 15 to 25 knots becoming northwest. rain
likely during the day, then showers likely sunday night. waves
3 to 5 feet building to 5 to 8 feet. waves occasionally around
10 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 pm est tue nov 11 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 29.0 inch low will linger over eastern quebec today, 
deepening to 28.2 inches at it then slowly advances towards 
newfoundland 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>065-120400-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm est tue nov 11 2025

.tonight...west winds to 30 knots becoming southwest. a chance of
rain showers early, then rain late this evening. rain and snow
after midnight. waves 7 to 11 feet. waves occasionally around
14 feet. 
.wednesday...southwest winds to 30 knots becoming west. rain and
snow early, then rain late in the morning. rain showers in the
afternoon. waves 6 to 10 feet. waves occasionally around 13 feet.
.wednesday night...west winds to 30 knots. rain showers. waves
6 to 10 feet. waves occasionally around 13 feet. 
.thursday...west winds 15 to 25 knots increasing to 30 knots.
rain showers. waves 6 to 10 feet. waves occasionally around
13 feet. 
.thursday night...northwest winds 15 to 25 knots. rain showers.
waves 5 to 9 feet subsiding to 3 to 6 feet. waves occasionally
around 11 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 5 feet subsiding
to 1 to 3 feet. 
.saturday...north winds 5 to 15 knots becoming southeast 15 to
20 knots. rain likely saturday night. waves 1 to 3 feet. 
.sunday...south winds 15 to 25 knots becoming northwest to
30 knots. rain likely during the day, then rain showers likely
sunday night. waves 3 to 5 feet building to 6 to 10 feet. waves
occasionally around 13 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm est tue nov 11 2025


slz022-120400-
saint lawrence river from cape vincent to ogdensburg-
402 pm est tue nov 11 2025

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

$$

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open lake forecast for lake erie
national weather service cleveland oh
256 pm est tue nov 11 2025

for waters beyond five nautical miles of shore on lake erie

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 warm front moves across the lake tonight followed by a cold
front on wednesday. a ridge averaging 30.10 inches builds over 
lake erie from the south thursday into friday. by saturday a warm 
front will lift across the eastern great lakes ahead of low 
pressure 29.40 inches and cold front on sunday. 


lez061-166>169-120315-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
256 pm est tue nov 11 2025

...gale warning in effect from 7 pm est this evening through late
tonight...

.tonight...southwest gales to 35 knots. a chance of rain with a
slight chance of snow this evening, then a chance of rain after
midnight. rain late. waves 8 to 12 feet. waves occasionally
around 15 feet. 
.wednesday...west winds to 30 knots. rain through early
afternoon, then a chance of rain late. waves 7 to 11 feet. waves
occasionally around 14 feet. 
.wednesday night...west winds to 30 knots. rain likely in the
evening, then a chance of rain overnight. waves 7 to 11 feet
subsiding to 6 to 9 feet. waves occasionally around 14 feet. 
.thursday...west winds 15 to 25 knots. waves 5 to 8 feet. waves
occasionally around 10 feet. 
.thursday night...west winds 15 to 20 knots. waves 3 to 6 feet
subsiding to 2 to 4 feet. 
.friday...west winds 5 to 15 knots becoming east. waves 1 to
3 feet. 
.saturday...southeast winds 10 to 15 knots becoming southwest and
increasing to 30 knots. rain likely saturday night. waves 1 to
3 feet building to 3 to 5 feet. 
.sunday...west winds to 30 knots becoming northwest. a chance of
rain. waves 5 to 8 feet. waves occasionally around 10 feet. 

$$