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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt tue jun 23 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 29.8 inch low will move off the southern new england 
coast today. a 30.1 inch high will then build into the ohio valley 
tonight through wednesday, then drift to the eastern seaboard 
wednesday night through thursday. a weak 29.9 inch low is then 
forecast to move from the central great lakes thursday to southern 
quebec friday, then the canadian maritimes saturday.


loz063>065-231500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt tue jun 23 2026

.today...northwest winds 5 to 10 knots becoming west. patchy
drizzle early. patchy fog this morning. waves 1 foot or less. 
.tonight...west winds 5 to 15 knots becoming northwest. waves
1 to 2 feet. 
.wednesday...northwest winds 5 to 15 knots becoming west. waves
2 feet or less. 
.wednesday night...west winds 5 to 15 knots becoming south less
than 10 knots. waves 2 feet or less. 
.thursday...south winds 10 knots or less. showers with a chance
of thunderstorms. waves 1 foot or less. 
.friday...southwest winds 10 knots or less becoming west. a
chance of showers during the day. waves 1 foot or less. 
.saturday...north winds 10 knots or less becoming northwest.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am edt tue jun 23 2026


slz022-024-231500-
saint lawrence river from cape vincent to saint regis
402 am edt tue jun 23 2026

.today...light and variable winds becoming northwest 5 to
10 knots. mostly cloudy early, then becoming mostly sunny. 
.tonight...northwest winds less than 10 knots. becoming mainly
clear. 
.wednesday...northwest winds 10 knots or less becoming west.
sunny.
.wednesday night...west winds 5 to 10 knots becoming light and
variable. partly cloudy in the evening, then becoming mostly
cloudy. 
.thursday...southwest winds less than 10 knots. showers likely
with a chance of thunderstorms. 
.friday...southwest winds less than 10 knots. showers likely with
a chance of thunderstorms. 
.saturday...light and variable winds. partly to mostly cloudy. 

winds and waves higher in and near thunderstorms.

$$