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open lake forecast for lake ontario
national weather service buffalo ny
402 am est wed nov 12 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 28.2 inch low will slowly advance northwards across 
newfoundland today. meanwhile, a weak 29.5 inch wave of low pressure 
will cross the great lakes. 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.


loz062-121600-
lake ontario open waters from the niagara river to hamlin beach-
402 am est wed nov 12 2025

.today...southwest winds to 30 knots becoming west. lake effect
rain this morning, then rain showers likely this afternoon. waves
4 to 7 feet building to 6 to 9 feet. waves occasionally around
11 feet. 
.tonight...west winds to 30 knots. a chance of showers early,
then showers from late evening on. 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. showers likely in
the evening, then a chance of showers overnight. waves 3 to
6 feet subsiding to 2 to 4 feet. 
.friday...northwest winds 5 to 15 knots becoming northeast. a
chance of rain showers during the day. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.saturday...southeast winds 5 to 15 knots becoming west 15 to
20 knots. a chance of rain showers during the day, then rain
saturday night. waves 2 feet or less building to 2 to 4 feet. 
.sunday...west winds to 30 knots. rain during the day, then rain
likely with a chance of snow sunday night. waves 5 to 8 feet
building to 7 to 11 feet, then subsiding to 6 to 9 feet. waves
occasionally around 14 feet. 

$$

fzus61 kbuf 120902
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open lake forecast for lake ontario
national weather service buffalo ny
402 am est wed nov 12 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 28.2 inch low will slowly advance northwards across 
newfoundland today. meanwhile, a weak 29.5 inch wave of low pressure 
will cross the great lakes. 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.


loz063-121600-
lake ontario open waters from hamlin beach to sodus bay-
402 am est wed nov 12 2025

.today...southwest winds to 30 knots becoming west. lake effect
rain and snow early, then lake effect rain from late morning on.
waves 5 to 8 feet building to 6 to 10 feet. waves occasionally
around 13 feet. 
.tonight...west winds to 30 knots. lake effect showers. waves
6 to 10 feet. waves occasionally around 13 feet. 
.thursday...west winds 20 to 25 knots. showers. waves 6 to
9 feet. waves occasionally around 11 feet. 
.thursday night...northwest winds 15 to 25 knots. showers likely.
waves 5 to 8 feet subsiding to 3 to 5 feet. waves occasionally
around 10 feet. 
.friday...northwest winds 15 to 20 knots becoming north 5 to
15 knots. a chance of rain showers during the day. waves 3 to
5 feet subsiding to 1 to 3 feet. 
.saturday...southeast winds 5 to 15 knots becoming southwest
15 to 20 knots. a chance of rain showers during the day, then
rain saturday night. waves 1 to 3 feet building to 3 to 5 feet. 
.sunday...west winds to 30 knots becoming northwest. rain during
the day, then rain likely with a chance of snow sunday night.
waves 7 to 10 feet building to 9 to 13 feet. waves occasionally
around 16 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am est wed nov 12 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 28.2 inch low will slowly advance northwards across 
newfoundland today. meanwhile, a weak 29.5 inch wave of low pressure 
will cross the great lakes. 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.


loz064-065-121600-
lake ontario open waters from sodus bay to the saint lawrence
river-
402 am est wed nov 12 2025

.today...southwest winds to 30 knots becoming west. lake effect
rain with lake effect snow showers likely early, then lake effect
rain from late morning on. waves 5 to 9 feet building to 7 to
10 feet. waves occasionally around 13 feet. 
.tonight...west winds to 30 knots becoming northwest. rain
showers likely early, then a chance of rain showers from late
evening on. waves 6 to 10 feet. waves occasionally around
13 feet. 
.thursday...northwest winds 15 to 25 knots becoming west. rain
showers. waves 5 to 9 feet. waves occasionally around 11 feet. 
.thursday night...northwest winds 15 to 25 knots. rain showers.
waves 5 to 8 feet subsiding to 3 to 6 feet. waves occasionally
around 10 feet. 
.friday...northwest winds 5 to 15 knots becoming north. 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...east winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. a chance of rain showers during the
day, then rain saturday night. waves 1 foot or less building to
3 to 5 feet. 
.sunday...west winds to 30 knots becoming northwest. rain during
the day, then rain with snow likely sunday night. waves 7 to
10 feet building to 9 to 13 feet. waves occasionally around
16 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am est wed nov 12 2025


slz022-121600-
saint lawrence river from cape vincent to ogdensburg-
402 am est wed nov 12 2025

.today...south winds 5 to 15 knots becoming southwest. lake
effect snow and lake effect rain through early afternoon, then
lake effect rain late. 
.tonight...west winds 5 to 10 knots. rain showers likely early,
then a chance of rain showers late in the evening. 
.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. 
.friday...northwest winds 10 knots or less. a chance of rain and
snow showers during the day. 
.saturday...southwest winds 10 knots or less becoming south. a
chance of rain showers during the day, then rain saturday night. 
.sunday...west winds 5 to 15 knots. rain during the day, then
rain with snow likely sunday night. 

$$

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open lake forecast for lake erie
national weather service cleveland oh
706 am est wed nov 12 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 cold front tracks across lake erie today. a ridge averaging 
30.10 inches builds over lake erie from the south thursday into 
friday. early saturday, a warm front will lift across the southern
great lakes followed by a strong cold front saturday night.


lez061-166>169-121515-
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-
706 am est wed nov 12 2025

.today...west gales to 35 knots. rain through early afternoon,
then a chance of rain late. waves 8 to 11 feet. waves
occasionally around 14 feet. 
.tonight...west winds to 30 knots. a chance of rain in the
evening, then a slight chance of rain after midnight. a chance of
rain late. waves 7 to 11 feet subsiding to 5 to 8 feet. waves
occasionally around 14 feet. 
.thursday...northwest winds 20 to 25 knots becoming west. a
chance of rain in the morning. 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 southeast. waves 1 to
3 feet subsiding to 1 foot or less. 
.saturday...south winds 10 to 15 knots becoming west and
increasing to 15 to 25 knots. a chance of rain during the day,
then rain saturday night. waves 2 feet or less building to 4 to
7 feet. waves occasionally around 9 feet. 
.sunday...west winds to 30 knots becoming northwest. a chance of
rain. waves 5 to 9 feet. waves occasionally around 11 feet. 

$$