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open lake forecast for lake ontario
national weather service buffalo ny
1002 am 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 30.5 inch high over central quebec will slowly weaken 
and pull northward through tonight. a 29.6 inch low will then 
approach the lower great lakes from the south late tonight into 
thursday, while strengthening to 29.4 inches by late thursday. the 
low will then move through the lower great lakes thursday night 
while continuing to strengthen, before tracking northeast on friday 
and into the canadian maritimes by saturday, deepening to 28.7 
inches by saturday. a large 30.4 inch surface high will then build 
across the ohio valley and lower great lakes region through sunday.


loz063>065-292100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt wed oct 29 2025

.this afternoon...east winds 5 to 15 knots becoming northeast.
waves 1 to 3 feet. 
.tonight...northeast winds 5 to 10 knots becoming southeast. a
chance of showers 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 7 to 10 feet. waves occasionally around 13 feet. 
.thursday night...northeast winds to 30 knots becoming north.
rain. waves 7 to 11 feet subsiding to 6 to 9 feet. waves
occasionally around 14 feet. 
.friday...northwest winds to 30 knots becoming west and
increasing to 35 knot gales. rain during the day, then showers
friday night. waves 7 to 10 feet building to 12 to 17 feet. waves
occasionally around 22 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 10 to 13 feet subsiding to 2 to 4 feet.
waves occasionally around 16 feet. 
.sunday...northwest winds 10 to 15 knots becoming southwest 15 to
20 knots. a chance of showers during the day, then showers likely
sunday night. waves 1 to 3 feet building to 2 to 4 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am edt wed oct 29 2025


slz022-024-292100-
saint lawrence river from cape vincent to saint regis
1002 am edt wed oct 29 2025

.this afternoon...northeast winds 10 knots or less. sunny.
.tonight...northeast winds less than 10 knots. mainly clear in
the evening, then becoming mostly cloudy. 
.thursday...east winds 10 knots or less becoming northeast 10 to
15 knots. rain.
.thursday night...northeast winds 15 to 20 knots diminishing to
10 to 15 knots. rain.
.friday...north winds 10 to 15 knots becoming west 15 to
20 knots. rain during the day, then rain showers friday night. 
.saturday...west winds 15 to 20 knots diminishing to less than
10 knots. rain showers during the day, then a chance of rain
showers saturday night. 
.sunday...west winds 10 knots or less becoming southwest. a
chance of rain showers. 

$$