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


slz022-024-150900-
saint lawrence river from cape vincent to saint regis
1003 pm edt tue jul 14 2026

.overnight...west winds 5 to 15 knots. showers likely with
a chance of thunderstorms, then a chance of showers late. patchy
smoke late. 
.wednesday...west winds 10 knots or less becoming northwest.
areas of smoke. 
.wednesday night...northwest winds 10 knots or less becoming
west. patchy smoke in the evening. 
.thursday...west winds 10 knots or less. sunny.
.thursday night...northwest winds 10 knots or less. becoming
mainly clear. 
.friday...northwest winds less than 10 knots becoming south.
mainly clear, then becoming partly cloudy. 
.saturday...south winds less than 10 knots becoming north. a
chance of showers during the day, then showers likely with a
chance of thunderstorms saturday night. 
.sunday...north winds less than 10 knots. a chance of showers
during the day. 

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 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 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, before deepening to 29.6 inches as it 
passes across new england sunday. meanwhile, a weak 29.9 inch high 
will slide across the great lakes sunday.


loz063>065-150900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt tue jul 14 2026

.overnight...west winds 15 to 20 knots. patchy smoke late.
waves 4 to 7 feet subsiding to 3 to 6 feet. waves occasionally
around 9 feet. 
.wednesday...west winds 10 to 15 knots. areas of smoke. waves
3 to 5 feet subsiding to 1 to 3 feet. 
.wednesday night...west winds 5 to 15 knots. patchy smoke in the
evening. waves 1 to 3 feet. 
.thursday...west winds 5 to 15 knots increasing to 15 to
20 knots. waves 2 feet or less building to 2 to 4 feet. 
.thursday night...west winds 15 to 20 knots becoming northeast
5 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northeast winds 5 to 10 knots becoming south. a chance
of showers friday night. waves 2 feet or less. 
.saturday...southeast winds 5 to 15 knots becoming west. showers
likely with a chance of thunderstorms. waves 2 feet or less. 
.sunday...north winds 5 to 15 knots becoming west. a chance of
showers during the day. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$