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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu sep 18 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 30.4 inch high will build southeast from central 
ontario to new england friday through saturday night, then off the 
new england coast sunday and monday.


loz062-190900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt thu sep 18 2025

.overnight...north winds 10 to 15 knots becoming northeast.
waves 1 to 3 feet. 
.friday...northeast winds 5 to 15 knots becoming east less than
10 knots. waves 1 to 3 feet subsiding to 1 foot or less. 
.friday night...east winds 10 knots or less increasing to 15 to
20 knots overnight. waves 1 foot or less building to 2 to 4 feet.
.saturday...east winds 15 to 20 knots. waves 3 to 5 feet. 
.saturday night...east winds 15 to 20 knots. waves 3 to 5 feet
subsiding to 2 to 4 feet. 
.sunday...southeast winds 10 to 15 knots becoming south. a chance
of showers sunday night. waves 1 to 3 feet. 
.monday...south winds 10 to 15 knots becoming southwest. a chance
of showers. waves 1 to 3 feet. 
.tuesday...west winds 5 to 10 knots becoming north. a chance of
showers. waves 1 foot or less. 

$$

fzus61 kbuf 190202
glflo 
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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu sep 18 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 30.4 inch high will build southeast from central 
ontario to new england friday through saturday night, then off the 
new england coast sunday and monday.


loz063>065-190900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt thu sep 18 2025

.overnight...north winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.friday...north winds 15 to 20 knots diminishing to 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday night...north winds 5 to 15 knots becoming northeast
15 to 20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...northeast winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.saturday night...northeast winds 10 to 15 knots becoming
southeast 15 to 20 knots. waves 1 to 3 feet. 
.sunday...southeast winds 15 to 20 knots becoming south. a chance
of showers sunday night. waves 2 to 4 feet building to 3 to
5 feet. 
.monday...south winds 15 to 20 knots becoming southwest and
diminishing to 5 to 10 knots. a chance of showers. waves 3 to
5 feet subsiding to 1 to 2 feet. 
.tuesday...southwest winds 5 to 10 knots becoming west. a chance
of showers. waves 2 feet or less. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm edt thu sep 18 2025


slz022-024-190900-
saint lawrence river from cape vincent to saint regis
1002 pm edt thu sep 18 2025

.overnight...north winds 5 to 10 knots. partly to mostly
cloudy. 
.friday...north winds 5 to 10 knots. sunny.
.friday night...north winds 10 knots or less becoming northeast.
mainly clear. 
.saturday...northeast winds 10 knots or less. sunny.
.saturday night...northeast winds less than 10 knots becoming
east. mainly clear. 
.sunday...southeast winds 5 to 15 knots becoming south. partly to
mostly cloudy. 
.monday...south winds 5 to 15 knots becoming southwest. a chance
of showers. 
.tuesday...southwest winds 10 knots or less becoming northwest. a
chance of showers. 

$$