fzus61 kbuf 182003
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open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sun oct 18 2026

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 ridge averaging 30.2 inches affects the lake through 
friday. one embedded high pressure center should wobble 
northeastward from southern pennsylvania to atlantic waters east of 
newfoundland through monday. another embedded and reinforcing high 
pressure center should move from near the border of the north-
central united states and canada to near the canadian maritimes this 
monday through wednesday. a third embedded and reinforcing high 
pressure center should wobble eastward from the canadian prairies to 
northern ontario this wednesday through thursday and then wobble 
southeastward to southern ontario this thursday night through friday.


loz063>065-190300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt sun oct 18 2026

.tonight...southwest winds 10 to 15 knots. waves 1 to 3 feet. 
.monday...southwest winds 5 to 15 knots becoming west. waves 1 to
3 feet. 
.monday night...west winds 5 to 15 knots becoming northeast.
waves 2 feet or less. 
.tuesday...northeast winds 15 to 20 knots diminishing to 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.tuesday night...northeast winds 15 to 20 knots diminishing to
5 to 15 knots. waves 1 to 3 feet. 
.wednesday...northeast winds 10 knots or less becoming northwest.
waves 2 feet or less. 
.thursday...northwest winds 5 to 10 knots becoming northeast and
increasing to 15 to 20 knots. waves 1 foot or less building to
3 to 5 feet. 
.friday...northeast winds 15 to 20 knots becoming east 5 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 

$$

fzus61 kbuf 182003
glfsl 
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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt sun oct 18 2026


slz022-024-190300-
saint lawrence river from cape vincent to saint regis
403 pm edt sun oct 18 2026

.tonight...southwest winds 5 to 10 knots. clear.
.monday...southwest winds 5 to 10 knots. sunny.
.monday night...southwest winds 10 knots or less becoming north.
mainly clear in the evening, then becoming partly cloudy. 
.tuesday...north winds 5 to 10 knots becoming northeast. mostly
sunny. 
.tuesday night...northeast winds 10 knots or less. mainly clear. 
.wednesday...northeast winds less than 10 knots. mainly clear. 
.thursday...light and variable winds becoming north 5 to
10 knots. becoming mainly clear. 
.friday...north winds 5 to 10 knots becoming light and variable.
mainly clear. 

$$