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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt tue jul 14 2026


slz022-024-142100-
saint lawrence river from cape vincent to saint regis
1003 am edt tue jul 14 2026

.this afternoon...southwest winds 10 to 15 knots increasing to
15 to 20 knots. mostly sunny. 
.tonight...southwest winds 5 to 15 knots becoming west. a chance
of showers early, then showers likely with a chance of
thunderstorms. a chance of showers late. 
.wednesday...west winds 10 knots or less becoming northwest.
partly to mostly sunny. 
.wednesday night...northwest winds 10 knots or less becoming
west. partly cloudy. 
.thursday...west winds 5 to 10 knots becoming northwest. partly
cloudy. 
.friday...northwest winds less than 10 knots. mainly clear, then
becoming partly cloudy. 
.saturday...south winds less than 10 knots becoming southwest. a
chance of showers. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt tue jul 14 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 large 30.2 inch high will shift well off the new 
england coast today, with a warm front shifting east of the lake 
this morning, while another 30.2 inch high shifts into the mid 
mississippi and lower ohio valleys. a cold front will cross the lake 
late tonight into wednesday morning, followed by a secondary cold 
front pushing south across the lake thursday night into friday. a 
weak 29.8 inch low over the upper great lakes friday, will move 
southeast into the lower great lakes on saturday.


loz063>065-142100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt tue jul 14 2026

.this afternoon...southwest winds 15 to 25 knots becoming west.
waves 3 to 6 feet building to 4 to 7 feet. waves occasionally
around 9 feet. 
.tonight...west winds 15 to 25 knots. waves 4 to 7 feet subsiding
to 3 to 6 feet. waves occasionally around 9 feet. 
.wednesday...west winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.wednesday night...west winds 15 to 20 knots diminishing to 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.thursday...west winds 5 to 10 knots becoming north 10 to
15 knots. waves 2 feet or less building to 2 to 4 feet. 
.friday...north winds 5 to 15 knots becoming south. a chance of
showers friday night. waves 2 feet or less. 
.saturday...south winds 5 to 15 knots becoming west. a chance of
showers. waves 2 feet or less. 

$$