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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1009 pm edt tue apr 14 2026


slz022-024-150900-
saint lawrence river from cape vincent to saint regis
1009 pm edt tue apr 14 2026

.overnight...north winds less than 10 knots becoming east.
patchy fog. 
.wednesday...light and variable winds. showers with a chance of
thunderstorms in the morning, then showers likely early in the
afternoon. a chance of showers late. 
.wednesday night...east winds less than 10 knots becoming south.
showers.
.thursday...south winds 5 to 10 knots becoming southwest. showers
in the morning, then showers likely in the afternoon. 
.thursday night...southwest winds 10 knots or less becoming west.
showers likely. 
.friday...north winds 10 knots or less becoming northeast. a
chance of showers. 
.saturday...southeast winds 5 to 15 knots becoming south. a
chance of showers during the day, then showers likely saturday
night. 
.sunday...southwest winds 10 to 15 knots becoming west. rain
showers likely during the day, then a chance of rain and snow
showers sunday night. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1008 pm edt tue apr 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 29.6 inch low just to the north of new england will 
continue to weaken as it slides eastward. a 29.6 inch low will move 
into the central great lakes wednesday night before reaching 
southern quebec thursday night, then drifting off the new england 
coast by friday night. a 30.0 inch high is then forecast to build 
from the central great lakes friday to the lower great lakes 
saturday morning, then off the east coast saturday night. a 29.3 
inch surface low to the north of lake superior saturday will deepen 
to 28.9 inches by sunday...with a trailing cold front crossing the 
lake saturday night.


loz063>065-150900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1008 pm edt tue apr 14 2026

.overnight...northwest winds 5 to 10 knots becoming
southeast. a chance of showers and thunderstorms late. waves 1 to
3 feet. 
.wednesday...southeast winds 5 to 15 knots becoming west. showers
with a chance of thunderstorms in the morning, then a chance of
showers and thunderstorms in the afternoon. waves 2 feet or less.
.wednesday night...southwest winds 5 to 10 knots. showers with a
chance of thunderstorms in the evening, then showers overnight.
waves 1 to 2 feet. 
.thursday...southwest winds around 10 knots. showers likely in
the morning, then showers likely with a chance of thunderstorms
in the afternoon. waves 1 to 2 feet. 
.thursday night...southwest winds 5 to 10 knots becoming west.
showers likely with a chance of thunderstorms in the evening,
then showers likely overnight. waves 1 to 2 feet. 
.friday...northwest winds 5 to 10 knots becoming northeast. a
chance of showers. waves 1 foot or less. 
.saturday...southeast winds 5 to 15 knots becoming southwest and
increasing to 15 to 25 knots. a chance of showers during the day,
then showers likely saturday night. waves 2 feet or less building
to 4 to 7 feet. waves occasionally around 9 feet. 
.sunday...southwest winds to 30 knots becoming west. rain showers
likely during the day, then a chance of rain and snow showers
sunday night. waves 6 to 10 feet building to 9 to 12 feet. waves
occasionally around 15 feet. 

winds and waves higher in and near thunderstorms.

$$