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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt sun sep 6 2026


slz022-024-062100-
saint lawrence river from cape vincent to saint regis
1003 am edt sun sep 6 2026

.this afternoon...northeast winds 5 to 10 knots becoming north.
mostly sunny. 
.tonight...northwest winds less than 10 knots. patchy fog after
midnight. 
.monday...light and variable winds. patchy fog in the morning. 
.monday night...west winds less than 10 knots. partly to mostly
cloudy. 
.tuesday...north winds 10 knots or less becoming southeast.
mostly cloudy. 
.wednesday...south winds 10 to 15 knots becoming southwest 15 to
20 knots. showers.
.thursday...southwest winds 5 to 15 knots becoming west. partly
to mostly cloudy. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt sun sep 6 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 high pressure ridge averaging 30.2 inches will gradually 
build from the upper great lakes southeast across the lower lakes 
through tuesday. the ridge will shift southeast on wednesday, 
allowing a warm front to sweep northeastward across the lake, 
followed by a cold front crossing the lake later wednesday night 
into thursday.


loz063>065-062100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt sun sep 6 2026

.this afternoon...northeast winds 15 to 20 knots diminishing to
10 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...north winds 5 to 15 knots diminishing to less than
10 knots. waves 2 feet or less. 
.monday...northwest winds 10 knots or less becoming west. waves
1 foot or less. 
.monday night...west winds 5 to 10 knots. waves 1 foot or less. 
.tuesday...west winds 10 knots or less becoming south 10 to
15 knots. waves 2 feet or less. 
.wednesday...south winds 15 to 25 knots becoming west. showers
with a chance of thunderstorms. waves 2 to 4 feet building to
4 to 7 feet. waves occasionally around 9 feet. 
.thursday...west winds 15 to 25 knots becoming northwest. waves
5 to 8 feet subsiding to 3 to 5 feet. waves occasionally around
10 feet. 

winds and waves higher in and near thunderstorms.

$$