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open lake forecast for lake ontario
national weather service buffalo ny
402 am 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.


loz062-011500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt tue jul 1 2025

.today...southwest winds around 10 knots becoming west. waves
1 to 2 feet. 
.tonight...southwest winds 5 to 10 knots becoming west. waves
1 to 2 feet. 
.wednesday...west winds around 10 knots becoming southwest. waves
1 to 2 feet. 
.wednesday night...southwest winds around 10 knots becoming west.
waves 1 to 2 feet. 
.thursday...west winds 5 to 10 knots becoming northwest. waves
1 to 2 feet. 
.friday...northwest winds 5 to 10 knots becoming south. waves
1 foot or less. 
.saturday...south winds 5 to 15 knots becoming southwest. a
chance of showers saturday night. waves 1 to 3 feet. 

$$

fzus61 kbuf 010802
glflo 
expires:202507011500;;685557

open lake forecast for lake ontario
national weather service buffalo ny
402 am 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>065-011500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt tue jul 1 2025

.today...southwest winds 10 to 15 knots becoming west. patchy fog
early. a chance of showers early. waves 1 to 2 feet. 
.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 15 knots. waves 1 to 2 feet. 
.thursday...west winds 5 to 15 knots becoming northwest. waves
1 to 2 feet. 
.friday...northwest winds 5 to 10 knots becoming south. waves
1 foot or less. 
.saturday...south winds 5 to 15 knots becoming southwest. waves
1 to 3 feet. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 am edt tue jul 1 2025


slz022-024-011500-
saint lawrence river from cape vincent to saint regis
402 am edt tue jul 1 2025

.today...southwest winds 5 to 10 knots. showers with a chance of
thunderstorms early, then a chance of showers late this morning.
a chance of showers and thunderstorms this afternoon. 
.tonight...southwest winds 10 knots or less. a chance of showers
and thunderstorms early. 
.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...west winds 10 knots or less becoming northwest. a
chance of showers and thunderstorms. 
.friday...northwest winds less than 10 knots becoming south.
mainly clear, then becoming partly cloudy. 
.saturday...south winds 5 to 10 knots becoming southwest. a
chance of showers saturday night. 

winds and waves higher in and near thunderstorms.

$$