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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt thu oct 8 2026


slz022-024-081500-
saint lawrence river from cape vincent to saint regis
403 am edt thu oct 8 2026

.today...southwest winds 5 to 15 knots becoming west. showers
likely early. a chance of showers this afternoon. 
.tonight...west winds 5 to 10 knots. partly cloudy. 
.friday...west winds 5 to 10 knots. mostly sunny. 
.friday night...northwest winds 5 to 10 knots becoming light and
variable. mainly clear. 
.saturday...light and variable winds becoming south 10 to
15 knots. mainly clear, then becoming partly cloudy. 
.sunday...southwest winds 5 to 15 knots becoming south. a chance
of showers sunday night. 
.monday...southwest winds 10 knots or less. a chance of showers
during the day, then showers likely monday night. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt thu oct 8 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 finish crossing eastward across the 
lake this morning. behind the front, a weak trough averaging 29.7 
inches should linger over the lake through today. tonight through 
friday, a ridge averaging 30.1 inches should affect the lake as the 
parent high pressure center moves from the western great lakes 
toward the central appalachians. a warm front will sweep northward 
across the lake friday night as the ridge begins to exit eastward. 
on saturday through monday, a weak trough averaging 29.9 inches 
should overspread the eastern great lakes generally from the south 
as isaias and its eventual remnant low approaches from the north-
central gulf coast and eventually the mid ohio valley and vicinity.


loz063>065-081500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt thu oct 8 2026

.today...west winds 15 to 20 knots. a chance of waterspouts. a
chance of showers. waves 3 to 6 feet. 
.tonight...west winds 15 to 20 knots. a chance of waterspouts. a
chance of showers. waves 3 to 6 feet. 
.friday...west winds 15 to 20 knots. a chance of waterspouts in
the morning. a chance of showers in the morning. waves 3 to
5 feet subsiding to 2 to 4 feet. 
.friday night...west winds 5 to 15 knots becoming east less than
10 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.saturday...southeast winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. waves 1 to 3 feet. 
.sunday...south winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers during the day, then showers likely
sunday night. waves 1 to 3 feet. 
.monday...southwest winds 5 to 10 knots increasing to 15 to
20 knots. a chance of showers during the day, then showers likely
monday night. waves 1 to 3 feet building to 3 to 5 feet. 

$$