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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu aug 28 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 29.9 inch elongated low will slowly track across 
southern and central quebec through tonight sending its slow-moving 
trailing cold front across the lake this evening through early 
friday morning. a 30.2 inch high over the upper great lakes will 
then settle across the lake later friday into the weekend, and just 
east of the lake on monday.


loz064-065-290900-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 pm edt thu aug 28 2025

.rest of tonight...southwest winds 15 to 20 knots becoming north.
a chance of waterspouts. showers, then scattered showers late.
waves 2 to 4 feet. 
.friday...northwest winds 10 to 15 knots becoming west. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.friday night...northwest winds 10 to 15 knots. a chance of
waterspouts in the evening. a chance of showers in the evening.
waves 1 to 3 feet. 
.saturday...northwest winds 10 to 15 knots becoming west 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday night...west winds 5 to 15 knots becoming northwest.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.sunday...northwest winds 10 knots or less becoming south. waves
2 feet or less. 
.monday...southeast winds less than 10 knots. waves 1 foot or
less. 
.tuesday...south winds 10 knots or less. waves 1 foot or less. 

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 pm edt thu aug 28 2025


slz022-024-290900-
saint lawrence river from cape vincent to saint regis
1002 pm edt thu aug 28 2025

.overnight...southwest winds 5 to 10 knots becoming
northwest. showers, then scattered showers late. 
.friday...northwest winds 5 to 10 knots becoming west. a chance
of showers through early afternoon, then showers likely late. 
.friday night...west winds 10 knots or less. a chance of showers.
.saturday...west winds 10 knots or less. a chance of showers. 
.saturday night...west winds less than 10 knots. a chance of
showers in the evening. 
.sunday...light and variable winds. mainly clear. 
.monday...light and variable winds. mainly clear. 
.tuesday...south winds less than 10 knots. partly cloudy. 

$$