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open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt wed aug 5 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 slowly 
southeastward from the lake ontario region through this monday. 
simultaneously, a cold front approaches slowly from the northwest.


loz062-060900-
lake ontario open waters from the niagara river to hamlin beach-
1003 pm edt wed aug 5 2026

.overnight...southeast winds 10 knots or less becoming
south. waves 1 foot or less. 
.thursday...southwest winds 10 knots or less becoming west. waves
1 foot or less. 
.thursday night...southwest winds 5 to 10 knots becoming light
and variable. waves 1 foot or less. 
.friday...light and variable winds. a chance of showers in the
morning, then showers likely with a chance of thunderstorms in
the afternoon. waves 1 foot or less. 
.friday night...southeast winds 5 to 10 knots becoming southwest.
showers likely with a chance of thunderstorms in the evening,
then a chance of showers overnight. waves 1 foot or less. 
.saturday...southwest winds 5 to 15 knots becoming west. a chance
of showers and thunderstorms. waves 1 to 2 feet. 
.sunday...west winds 5 to 15 knots becoming southwest. a chance
of showers sunday night. waves 1 to 2 feet. 
.monday...west winds 5 to 10 knots. a chance of showers during
the day, then showers likely monday night. waves around 1 foot. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 060203
glflo 
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open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt wed aug 5 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 slowly 
southeastward from the lake ontario region through this monday. 
simultaneously, a cold front approaches slowly from the northwest.


loz063>065-060900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 pm edt wed aug 5 2026

.overnight...south winds 5 to 10 knots. a chance of showers
late. waves 1 foot or less. 
.thursday...south winds 5 to 15 knots becoming west. a chance of
showers early. waves 2 feet or less. 
.thursday night...south winds 10 knots or less becoming
southwest. waves 1 foot or less. 
.friday...southwest winds 10 knots or less becoming south.
showers likely with a chance of thunderstorms in the afternoon.
waves 1 foot or less. 
.friday night...south winds 10 knots or less becoming southwest.
showers likely with a chance of thunderstorms in the evening,
then showers likely overnight. waves 1 foot or less. 
.saturday...southwest winds 10 to 15 knots becoming west. showers
likely with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms saturday night. waves 2 feet
or less. 
.sunday...west winds 5 to 15 knots becoming southwest. a chance
of showers sunday night. waves 1 to 3 feet. 
.monday...west winds 5 to 10 knots. a chance of showers during
the day, then showers likely with a chance of thunderstorms
monday night. waves 1 to 2 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
1003 pm edt wed aug 5 2026


slz022-024-060900-
saint lawrence river from cape vincent to saint regis
1003 pm edt wed aug 5 2026

.overnight...light and variable winds becoming south 5 to
10 knots. mostly cloudy. 
.thursday...southwest winds 10 knots or less. a chance of showers
in the morning, then a chance of showers and thunderstorms in the
afternoon. 
.thursday night...southwest winds 5 to 10 knots becoming light
and variable. partly cloudy. 
.friday...light and variable winds. a chance of showers and
thunderstorms in the afternoon. 
.friday night...southwest winds less than 10 knots becoming
south. a chance of showers and thunderstorms in the evening, then
a chance of showers overnight. 
.saturday...southwest winds 5 to 10 knots. a chance of showers
and thunderstorms. 
.sunday...southwest winds 5 to 10 knots. a chance of showers. 
.monday...southwest winds 10 knots or less. a chance of showers. 

winds and waves higher in and near thunderstorms.

$$