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open lake forecast for lake ontario
national weather service buffalo ny
439 pm edt fri aug 7 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 30.0 inches exits 
eastward before a cold front sweeps eastward across lake ontario 
saturday night. behind the front, a ridge averaging 30.1 inches
builds from the western great lakes through sunday. this ridge 
begins to exit eastward sunday night and another cold front should
sweep eastward across lake ontario monday night. behind the 
front, a trough averaging 29.8 inches should linger over the 
eastern great lakes through this wednesday.


loz062-080315-
lake ontario open waters from the niagara river to hamlin beach-
439 pm edt fri aug 7 2026

.tonight...east winds 10 knots or less becoming southwest. a
chance of showers and thunderstorms early. waves 1 foot or less. 
.saturday...southwest winds 5 to 15 knots. a chance of showers
late in the morning. waves 2 feet or less. 
.saturday night...southwest winds 10 to 15 knots becoming west. a
chance of showers and thunderstorms in the evening. waves 1 to
2 feet. 
.sunday...west winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.sunday night...southwest winds 5 to 10 knots becoming south.
waves 2 feet or less. 
.monday...southwest winds 5 to 15 knots becoming west. showers
likely with a chance of thunderstorms. waves 1 to 2 feet. 
.tuesday...west winds 10 knots or less becoming northwest.
showers likely during the day, then a chance of showers tuesday
night. waves 1 foot or less. 
.wednesday...northwest winds 10 knots or less becoming west.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 072039
glflo 
expires:202608080315;;789544

open lake forecast for lake ontario
national weather service buffalo ny
439 pm edt fri aug 7 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 30.0 inches exits 
eastward before a cold front sweeps eastward across lake ontario 
saturday night. behind the front, a ridge averaging 30.1 inches
builds from the western great lakes through sunday. this ridge 
begins to exit eastward sunday night and another cold front should
sweep eastward across lake ontario monday night. behind the 
front, a trough averaging 29.8 inches should linger over the 
eastern great lakes through this wednesday.


loz063>065-080315-
lake ontario open waters from hamlin beach to the saint lawrence
river-
439 pm edt fri aug 7 2026

.tonight...east winds less than 10 knots becoming south. a chance
of showers and thunderstorms this evening, then a chance of
showers after midnight. waves 1 foot or less. 
.saturday...southwest winds 5 to 10 knots. a chance of showers
late in the morning. a chance of showers and thunderstorms in the
afternoon. waves 2 feet or less. 
.saturday night...southwest winds 5 to 15 knots becoming west. a
chance of showers. waves 2 feet or less building to 2 to 3 feet. 
.sunday...west winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday night...southwest winds 5 to 15 knots becoming south.
waves 2 feet or less. 
.monday...south winds 5 to 10 knots becoming west. a chance of
showers and thunderstorms during the day, then showers likely
with a chance of thunderstorms monday night. waves 1 to 2 feet. 
.tuesday...west winds 5 to 10 knots becoming northwest. a chance
of showers. waves 2 feet or less. 
.wednesday...northwest winds 5 to 10 knots becoming west. a
chance of showers wednesday night. 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
403 pm edt fri aug 7 2026


slz022-024-080300-
saint lawrence river from cape vincent to saint regis
403 pm edt fri aug 7 2026

.tonight...southwest winds less than 10 knots. a chance of
showers from late evening on. 
.saturday...light and variable winds becoming southwest 5 to
10 knots. a chance of showers early. 
.saturday night...southwest winds 5 to 10 knots. a chance of
showers and thunderstorms in the evening, then a chance of
showers overnight. 
.sunday...west winds 5 to 10 knots becoming southwest. becoming
mostly sunny. 
.sunday night...southwest winds 10 knots or less becoming south.
mainly clear in the evening, then becoming partly cloudy. 
.monday...south winds 10 knots or less becoming southwest.
showers likely with a chance of thunderstorms. 
.tuesday...west winds less than 10 knots. a chance of showers. 
.wednesday...light and variable winds. a chance of showers. 

winds and waves higher in and near thunderstorms.

$$