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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt wed oct 29 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 29.6 inch low will approach new york state from the 
south overnight and thursday, while strengthening to 29.4 inches. 
the low will then move across new york state thursday night, new 
england on friday, and to the canadian maritimes friday night and 
saturday while steadily deepening to 28.7 inches. a large 30.3 inch 
surface high will then build across the ohio valley and lower great 
lakes region through sunday, before sliding east and off the mid-
atlantic coastline on monday.


loz063-300900-
lake ontario open waters from hamlin beach to sodus bay-
1002 pm edt wed oct 29 2025

...gale watch in effect from friday afternoon through friday
evening...

.overnight...east winds 10 to 15 knots becoming southeast.
a chance of rain late. waves 1 to 2 feet. 
.thursday...east winds 15 to 25 knots becoming northeast to
30 knots. rain. waves 1 to 3 feet building to 8 to 11 feet. waves
occasionally around 14 feet. 
.thursday night...northeast winds to 30 knots. showers. waves
7 to 11 feet subsiding to 6 to 9 feet. waves occasionally around
14 feet. 
.friday...northwest winds to 30 knots increasing to 35 knot gales
in the afternoon. showers. waves 5 to 9 feet building to 10 to
15 feet. waves occasionally around 19 feet. 
.friday night...northwest gales to 35 knots. showers. waves 10 to
15 feet subsiding to 9 to 12 feet. waves occasionally around
19 feet. 
.saturday...northwest winds to 30 knots diminishing to 10 to
15 knots. showers likely during the day, then a chance of showers
saturday night. waves 8 to 11 feet subsiding to 1 to 3 feet.
waves occasionally around 14 feet. 
.sunday...northwest winds 10 to 15 knots becoming southwest 15 to
20 knots. a chance of showers. waves 1 to 3 feet building to 2 to
4 feet. 
.monday...southwest winds 15 to 25 knots becoming west to
30 knots. a chance of showers. waves 3 to 6 feet building to 6 to
10 feet. waves occasionally around 13 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt wed oct 29 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 29.6 inch low will approach new york state from the 
south overnight and thursday, while strengthening to 29.4 inches. 
the low will then move across new york state thursday night, new 
england on friday, and to the canadian maritimes friday night and 
saturday while steadily deepening to 28.7 inches. a large 30.3 inch 
surface high will then build across the ohio valley and lower great 
lakes region through sunday, before sliding east and off the mid-
atlantic coastline on monday.


loz064-300900-
lake ontario open waters from sodus bay to mexico bay-
1002 pm edt wed oct 29 2025

...gale watch in effect from friday afternoon through late friday
night...

.overnight...east winds around 10 knots becoming southeast
and increasing to 15 to 20 knots. a chance of rain late. waves
2 feet or less. 
.thursday...southeast winds 10 to 15 knots becoming northeast and
increasing to 30 knots in the afternoon. rain. waves 1 to 3 feet
building to 4 to 7 feet. waves occasionally around 9 feet. 
.thursday night...northeast winds to 30 knots diminishing to
15 to 25 knots. showers. waves 5 to 8 feet. waves occasionally
around 10 feet. 
.friday...north winds 15 to 25 knots becoming west and increasing
to 35 knot gales in the afternoon. showers. waves 4 to 7 feet
building to 10 to 15 feet. waves occasionally around 19 feet. 
.friday night...west gales to 35 knots becoming northwest and
diminishing to 30 knots. showers. waves 10 to 15 feet. waves
occasionally around 19 feet. 
.saturday...northwest winds to 30 knots diminishing to 10 to
15 knots. showers likely during the day, then a chance of showers
saturday night. waves 8 to 11 feet subsiding to 2 to 4 feet.
waves occasionally around 14 feet. 
.sunday...northwest winds 10 to 15 knots becoming southwest 15 to
20 knots. a chance of showers. waves 1 to 3 feet building to 2 to
4 feet. 
.monday...southwest winds 15 to 25 knots becoming west to
30 knots. a chance of showers during the day, then showers likely
monday night. waves 3 to 6 feet building to 6 to 10 feet. waves
occasionally around 13 feet. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt wed oct 29 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 29.6 inch low will approach new york state from the 
south overnight and thursday, while strengthening to 29.4 inches. 
the low will then move across new york state thursday night, new 
england on friday, and to the canadian maritimes friday night and 
saturday while steadily deepening to 28.7 inches. a large 30.3 inch 
surface high will then build across the ohio valley and lower great 
lakes region through sunday, before sliding east and off the mid-
atlantic coastline on monday.


loz065-300900-
lake ontario open waters from mexico bay to the saint lawrence
river-
1002 pm edt wed oct 29 2025

...gale watch in effect from friday afternoon through late friday
night...

.overnight...east winds around 10 knots becoming southeast
and increasing to 15 to 20 knots. a chance of rain late. waves
1 foot or less. 
.thursday...southeast winds 10 to 15 knots becoming northeast and
increasing to 30 knots in the afternoon. rain. waves 1 to 3 feet
building to 3 to 5 feet. 
.thursday night...northeast winds 15 to 25 knots. showers. waves
3 to 5 feet. 
.friday...north winds 15 to 25 knots becoming west and increasing
to 35 knot gales in the afternoon. showers. waves 2 to 4 feet
building to 9 to 12 feet. waves occasionally around 15 feet. 
.friday night...west gales to 35 knots becoming northwest and
diminishing to 30 knots. showers. waves 9 to 13 feet subsiding to
8 to 11 feet. waves occasionally around 16 feet. 
.saturday...northwest winds to 30 knots diminishing to 5 to
10 knots. showers likely during the day, then a chance of showers
saturday night. waves 6 to 9 feet subsiding to 1 to 3 feet. waves
occasionally around 11 feet. 
.sunday...northwest winds 5 to 15 knots becoming southwest 15 to
20 knots. a chance of showers. waves 2 feet or less building to
2 to 4 feet. 
.monday...southwest winds 15 to 25 knots becoming west to
30 knots. a chance of showers during the day, then showers likely
monday night. waves 3 to 6 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
1002 pm edt wed oct 29 2025


slz022-024-300900-
saint lawrence river from cape vincent to saint regis
1002 pm edt wed oct 29 2025

.rest of tonight...northeast winds less than 10 knots. mainly
clear late this evening, then becoming mostly cloudy. 
.thursday...east winds 10 knots or less becoming northeast 10 to
15 knots. a chance of rain early, then rain from late morning on.
.thursday night...northeast winds 10 to 15 knots. showers.
.friday...northeast winds 10 to 15 knots becoming west 15 to
20 knots. showers.
.friday night...west winds 15 to 20 knots. rain showers. 
.saturday...west winds 15 to 20 knots diminishing to less than
10 knots. rain showers during the day. 
.sunday...west winds 10 knots or less becoming southwest. a
chance of rain showers sunday night. 
.monday...southwest winds 5 to 15 knots becoming west. rain
showers likely. 

$$