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open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt tue jul 1 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 29.2 inch low over northern quebec today will move 
east to the labrador coast through wednesday, with a weak trailing 
cold front crossing the lake this afternoon. a 30.0 inch high will 
build into the ohio valley tonight through wednesday. another weak 
cold front will move southeast across the lake thursday. a 30.1 inch 
high will then build into the ohio valley and great lakes friday 
before drifting to the eastern seaboard saturday.


loz063>065-020300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt tue jul 1 2025

.tonight...southwest winds 5 to 15 knots becoming west. waves
1 to 2 feet. 
.wednesday...west winds 10 to 15 knots. waves 1 to 2 feet. 
.wednesday night...west winds 5 to 10 knots. waves 1 to 2 feet. 
.thursday...west winds 10 to 15 knots. a chance of showers and
thunderstorms in the morning, then a chance of showers in the
afternoon. waves 1 to 2 feet. 
.thursday night...west winds 5 to 15 knots becoming northwest.
waves 1 to 2 feet. 
.friday...northwest winds 5 to 10 knots becoming south. waves
2 feet or less. 
.saturday...south winds 5 to 15 knots. waves 2 feet or less. 
.sunday...southwest winds 10 to 15 knots. a chance of showers
sunday night. 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
402 pm edt tue jul 1 2025


slz022-024-020300-
saint lawrence river from cape vincent to saint regis
402 pm edt tue jul 1 2025

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

winds and waves higher in and near thunderstorms.

$$