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open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sun aug 30 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 frontal boundary north of lake ontario will settle 
south across the lake tonight, then stall just southwest of the lake 
monday. the front will then move back northeast across the lake as a 
warm front monday night through early tuesday. the frontal zone will 
continue to meander north and south over or near the lake through 
much of the week.


loz063>065-310300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sun aug 30 2026

.tonight...west winds 10 knots or less becoming south. waves
2 feet or less. 
.monday...southeast winds 10 knots or less. a chance of showers.
showers with a chance of thunderstorms late. waves 1 foot or
less. 
.monday night...southeast winds 10 knots or less becoming
southwest. showers likely with a chance of thunderstorms. waves
1 foot or less. 
.tuesday...southwest winds 5 to 10 knots becoming northwest. a
chance of showers. waves 1 foot or less. 
.tuesday night...east winds 10 knots or less becoming south. a
chance of showers. waves 1 foot or less. 
.wednesday...south winds 5 to 15 knots becoming west. showers
likely with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms wednesday night. waves 2 feet
or less. 
.thursday...west winds 5 to 10 knots becoming northwest. a chance
of showers during the day. waves 2 feet or less. 
.friday...northwest winds 5 to 10 knots becoming north. 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
1003 am edt sun aug 30 2026


slz022-024-302100-
saint lawrence river from cape vincent to saint regis
1003 am edt sun aug 30 2026

.this afternoon...southwest winds 5 to 10 knots. a chance of
showers, then showers likely late. 
.tonight...southwest winds 5 to 10 knots becoming light and
variable. showers likely early. patchy fog late. 
.monday...light and variable winds. patchy fog in the morning. a
chance of showers in the afternoon. 
.monday night...light and variable winds. showers likely in the
evening, then showers overnight. 
.tuesday...northeast winds 10 knots or less becoming east.
showers during the day, then a chance of showers tuesday night. 
.wednesday...southeast winds 10 knots or less becoming south.
showers likely. 
.thursday...southwest winds less than 10 knots. a chance of
showers. 

$$