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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt wed jun 10 2026


slz022-024-110900-
saint lawrence river from cape vincent to saint regis
1003 pm edt wed jun 10 2026

.rest of tonight...southwest winds 10 knots or less. a chance of
showers late this evening. 
.thursday...southwest winds 10 knots or less. a chance of showers
late in the morning. a chance of showers and thunderstorms in the
afternoon. 
.thursday night...southwest winds 10 knots or less. a chance of
showers and thunderstorms in the evening. 
.friday...south winds 10 knots or less becoming southwest.
showers with a chance of thunderstorms in the afternoon. 
.friday night...southwest winds 10 knots or less. showers with a
chance of thunderstorms in the evening. 
.saturday...southwest winds 5 to 10 knots. a chance of showers
and thunderstorms saturday night. 
.sunday...southwest winds 5 to 10 knots becoming west. showers
likely with a chance of thunderstorms. 
.monday...west winds 10 knots or less becoming southwest. partly
to mostly cloudy. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt wed jun 10 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 warm front will continue northeast of the lake this 
evening. another warm front will cross the lake thursday night ahead 
of a 29.7 inch trough that will cross the lake later friday. 
associated with the trough, an attendant cold front across the lake 
friday afternoon and evening. a 30.0 inch high will ridge across the 
lower great lakes friday night through sunday morning, before a cold 
front crosses the region later sunday or sunday night. the eastern 
edge of a 30.1 inch high over the central portion of the conus will 
push over the lake on monday.


loz063>065-110900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt wed jun 10 2026

.overnight...southwest winds 5 to 10 knots. patchy fog
late. a chance of showers late. waves 2 feet or less. 
.thursday...southwest winds 5 to 15 knots becoming west. patchy
fog in the morning. a chance of showers through early afternoon.
waves 2 feet or less. 
.thursday night...west winds 5 to 15 knots becoming southwest.
waves 2 feet or less. 
.friday...south winds 5 to 15 knots becoming west 15 to 20 knots.
showers with a chance of thunderstorms. waves 1 to 3 feet. 
.friday night...west winds 15 to 20 knots diminishing to 5 to
15 knots. showers in the evening. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.saturday...west winds 5 to 15 knots becoming south. a chance of
showers and thunderstorms saturday night. waves 1 to 2 feet. 
.sunday...southwest winds 10 to 15 knots becoming west. showers
likely with a chance of thunderstorms during the day, then
showers likely sunday night. waves 1 to 3 feet. 
.monday...west winds 5 to 15 knots becoming south. waves 1 to
3 feet. 

winds and waves higher in and near thunderstorms.

$$