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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt wed jul 2 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 compact 29.6 surface low over central quebec tonight 
will swing a weak cold front slowly across the lake later 
tonight and tomorrow. an expansive 30.1 inch area of high 
pressure will then build across the great lakes thursday night and 
friday...before drifting to the eastern seaboard saturday. a wavy 
cold frontal boundary is then forecast to slowly push southeastward 
across the upper great lakes and southern ontario during sunday. 
this will be followed by an 30.1 inch area of high pressure that 
will settle over the lake through the day monday.


loz063>065-030900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt wed jul 2 2025

.rest of tonight...west winds 5 to 15 knots. a chance of showers
and thunderstorms late this evening. a chance of showers and
thunderstorms late. waves 1 to 2 feet. 
.thursday...west winds 5 to 10 knots. a chance of showers and
thunderstorms in the morning. waves 1 to 2 feet. 
.thursday night...west winds 5 to 10 knots becoming north. waves
2 feet or less. 
.friday...north winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.friday night...southwest winds 5 to 10 knots becoming south.
waves 1 foot or less. 
.saturday...south winds 5 to 10 knots. waves 2 feet or less. 
.sunday...southwest winds 5 to 15 knots. waves 1 to 3 feet. 
.monday...southwest winds 10 to 15 knots becoming north. a chance
of showers and thunderstorms. waves 1 to 3 feet. 

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
1002 pm edt wed jul 2 2025


slz022-024-030900-
saint lawrence river from cape vincent to saint regis
1002 pm edt wed jul 2 2025

.rest of tonight...southwest winds 10 knots or less. mainly clear
late this evening, then becoming mostly cloudy. 
.thursday...southwest winds 10 knots or less becoming west. a
chance of showers and thunderstorms in the morning, then showers
likely with a chance of thunderstorms early in the afternoon. a
chance of showers and thunderstorms late. 
.thursday night...northwest winds less than 10 knots. a chance of
showers and thunderstorms in the evening. 
.friday...northwest winds less than 10 knots. sunny.
.friday night...west winds less than 10 knots. mainly clear in
the evening, then becoming partly cloudy. 
.saturday...southwest winds 10 knots or less. partly cloudy. 
.sunday...southwest winds 5 to 10 knots. a chance of showers
sunday night. 
.monday...southwest winds 10 knots or less becoming north. a
chance of showers and thunderstorms. 

winds and waves higher in and near thunderstorms.

$$