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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt sat oct 10 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 high pressure ridge averaging 30.1 inches exits slowly 
eastward today through sunday before a weak trough averaging 29.8 
inches slides eastward across the lake sunday night. behind the 
trough, a weak ridge averaging 29.9 inches slides eastward across 
the lake on monday, exits eastward monday night, and is followed by 
a cold front sweeping southeastward across the lake on tuesday. 
behind the cold front, a ridge averaging 30.0 inches builds from 
northern ontario and vicinity through this wednesday.


loz063>065-102100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt sat oct 10 2026

.this afternoon...southeast winds 10 to 15 knots becoming east.
waves 2 feet or less. 
.tonight...east winds 10 to 15 knots becoming southeast 15 to
20 knots. waves 1 to 3 feet. 
.sunday...southeast winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of rain in the morning, then rain in the
afternoon. waves 1 to 3 feet. 
.sunday night...east winds 5 to 15 knots becoming northeast.
rain. waves 1 to 3 feet. 
.monday...northwest winds 10 knots or less becoming southwest and
increasing to 15 to 20 knots. showers likely monday night. waves
1 to 3 feet. 
.tuesday...north winds 15 to 20 knots. showers. waves 3 to 5 feet
subsiding to 2 to 4 feet. 
.wednesday...north winds 15 to 20 knots diminishing to 5 to
10 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt sat oct 10 2026


slz022-024-102100-
saint lawrence river from cape vincent to saint regis
1003 am edt sat oct 10 2026

.this afternoon...light and variable winds. sunny.
.tonight...east winds 10 knots or less becoming south. partly
cloudy early, then becoming mostly cloudy. 
.sunday...south winds 5 to 10 knots. rain likely in the
afternoon. 
.sunday night...south winds less than 10 knots. rain.
.monday...light and variable winds becoming east 10 to 15 knots.
showers monday night. 
.tuesday...northeast winds 5 to 15 knots becoming north. showers.
.wednesday...north winds 5 to 10 knots becoming light and
variable. partly to mostly cloudy. 

$$