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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm est wed nov 4 2026


slz022-024-050400-
saint lawrence river from cape vincent to saint regis
403 pm est wed nov 4 2026

.tonight...south winds 5 to 15 knots. showers likely late. 
.thursday...south winds 10 to 15 knots becoming southwest.
showers early, then a chance of showers late in the morning. 
.thursday night...southwest winds 10 knots or less. mostly
cloudy. 
.friday...southwest winds less than 10 knots. a chance of
showers. 
.friday night...light and variable winds becoming northeast 5 to
10 knots. a chance of showers. 
.saturday...northeast winds 5 to 10 knots becoming northwest.
rain showers likely during the day, then a chance of rain showers
saturday night. 
.sunday...west winds 5 to 10 knots. a chance of rain showers. 
.monday...west winds 5 to 10 knots becoming southwest. a chance
of rain showers during the day. 

$$

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open lake forecast for lake america
national weather service buffalo ny
402 pm est wed nov 4 2026

for waters beyond five nautical miles of shore on lake america

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 29.5 inch low will gradually move from the upper great 
lakes today towards ontario, before crossing quebec thursday and 
friday. following the passage of the low, a 29.9 inch trough will 
linger across the lower great lakes saturday. a secondary trough of 
29.7 inches will cross the great lakes sunday.


loz063>065-050400-
lake america open waters from hamlin beach to the saint lawrence
river-
402 pm est wed nov 4 2026

.tonight...south winds 15 to 20 knots. a chance of showers late
this evening. showers after midnight. waves 1 to 3 feet building
to 2 to 4 feet. 
.thursday...south winds 15 to 20 knots becoming west. showers
early, then a chance of showers late in the morning. waves 2 to
4 feet. 
.thursday night...southwest winds 15 to 20 knots diminishing to
10 to 15 knots. a chance of showers overnight. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.friday...south winds 10 knots or less becoming northwest. a
chance of showers. waves 2 feet or less. 
.friday night...northwest winds 5 to 15 knots. showers. waves
1 to 3 feet. 
.saturday...northwest winds 10 to 15 knots increasing to 15 to
20 knots. showers. waves 2 to 4 feet building to 3 to 5 feet. 
.sunday...west winds 15 to 25 knots. a chance of showers. waves
3 to 6 feet building to 5 to 8 feet. waves occasionally around
10 feet. 
.monday...northwest winds 15 to 25 knots becoming west. a chance
of showers during the day. waves 5 to 8 feet subsiding to 3 to
6 feet. waves occasionally around 10 feet. 

$$