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open lake forecast for lake ontario
national weather service buffalo ny
403 am edt sat aug 8 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 29.7 inch low will send a cold front eastward across 
lake ontario tonight. 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.


loz062-081500-
lake ontario open waters from the niagara river to hamlin beach-
403 am edt sat aug 8 2026

.today...southwest winds 10 knots or less increasing to 10 to
15 knots. patchy dense fog early. a chance of showers through
early afternoon, then a chance of showers and thunderstorms late.
waves 2 feet or less. 
.tonight...southwest winds 5 to 10 knots becoming west. a chance
of showers and thunderstorms early. waves 2 feet or less. 
.sunday...northwest winds 5 to 15 knots becoming southwest. waves
2 feet or less. 
.sunday night...southwest winds 5 to 10 knots. a chance of
showers overnight. waves 1 foot or less. 
.monday...southwest winds 5 to 15 knots becoming west. showers
likely with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms monday night. waves 2 feet or
less. 
.tuesday...west winds 5 to 10 knots becoming northwest. a chance
of showers during the day. waves 1 foot or less. 
.wednesday...west winds 5 to 10 knots. a chance of showers
wednesday night. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 080803
glflo 
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open lake forecast for lake ontario
national weather service buffalo ny
403 am edt sat aug 8 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 29.7 inch low will send a cold front eastward across 
lake ontario tonight. 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>065-081500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 am edt sat aug 8 2026

.today...southwest winds 10 knots or less becoming south. a
chance of showers late this morning. a chance of showers and
thunderstorms this afternoon. waves 1 foot or less. 
.tonight...south winds 5 to 10 knots becoming west. a chance of
showers and thunderstorms early, then a chance of showers. waves
2 feet or less. 
.sunday...west winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday night...west winds 5 to 15 knots becoming south. waves
2 feet or less. 
.monday...south winds 5 to 10 knots becoming west. showers likely
with a chance of thunderstorms. waves 2 feet or less. 
.tuesday...west winds 5 to 10 knots. a chance of showers during
the day. waves 2 feet or less. 
.wednesday...west winds 5 to 10 knots. 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 am edt sat aug 8 2026


slz022-024-081500-
saint lawrence river from cape vincent to saint regis
403 am edt sat aug 8 2026

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

winds and waves higher in and near thunderstorms.

$$