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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt sat may 9 2026


slz022-024-091500-
saint lawrence river from cape vincent to saint regis
403 am edt sat may 9 2026

.today...south winds 5 to 10 knots. mostly sunny. 
.tonight...south winds 5 to 15 knots becoming southwest. showers.
a chance of showers late. 
.sunday...southwest winds 5 to 15 knots. mostly sunny. 
.sunday night...southwest winds 5 to 15 knots becoming west less
than 10 knots. partly cloudy in the evening, then becoming mainly
clear. 
.monday...west winds less than 10 knots. a chance of rain
showers. 
.tuesday...northwest winds less than 10 knots. mainly clear, then
becoming partly cloudy. 
.wednesday...southeast winds 5 to 10 knots. a chance of rain
showers. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat may 9 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 30.1 inch high will drift off the mid atlantic coast 
through tonight. a weak 29.5 inch low will then move from the upper 
great lakes saturday to western quebec by early sunday before moving 
to northern quebec early monday. meanwhile, a trailing cold front 
will cross the lake sunday night. a 30.4 inch high will then build 
from the upper great lakes monday to the lower great lakes by 
tuesday.


loz063>065-091500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sat may 9 2026

.today...southeast winds 5 to 15 knots. waves 2 feet or less. 
.tonight...south winds 10 to 15 knots becoming west. a chance of
showers early, then showers late in the evening. a chance of
showers after midnight. waves 1 to 3 feet. 
.sunday...west winds 10 to 15 knots increasing to 15 to 20 knots.
waves 1 to 3 feet building to 2 to 4 feet. 
.sunday night...west winds 5 to 15 knots. waves 1 to 3 feet. 
.monday...west winds 5 to 15 knots becoming northwest. waves 1 to
3 feet. 
.tuesday...northwest winds 5 to 15 knots becoming southeast. a
chance of rain showers tuesday night. waves 2 feet or less. 
.wednesday...southeast winds 10 to 15 knots. showers likely.
waves 1 to 3 feet. 

$$