fzus61 kbuf 152003
glfsl 
expires:202608160300;;249738

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm edt sat aug 15 2026


slz022-024-160300-
saint lawrence river from cape vincent to saint regis
402 pm edt sat aug 15 2026

.tonight...northeast winds 5 to 10 knots becoming light and
variable. mainly clear this evening, then becoming partly cloudy.
.sunday...light and variable winds. a chance of showers late. 
.sunday night...southeast winds 10 knots or less becoming
southwest. showers likely with a chance of thunderstorms. 
.monday...southwest winds less than 10 knots becoming northwest.
a chance of showers. 
.monday night...light and variable winds. a chance of showers in
the evening. 
.tuesday...light and variable winds becoming south 5 to 10 knots.
partly cloudy. 
.wednesday...southwest winds 10 knots or less becoming west.
showers likely with a chance of thunderstorms. 
.thursday...northwest winds less than 10 knots. becoming mainly
clear. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 152002
glflo 
expires:202608160300;;249735

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sat aug 15 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 30.2 inch ridge will move east acorss new england tonight. a 29.7 
inch low will move southeast from the northern great lakes to 
southern new england tonight through monday. a warm front will drift 
northeast across lake ontario late sunday before a cold front sweeps 
east across the lake sunday night. behind the cold front, a trough 
averaging 29.8 inches should linger over lake ontario monday. a 30.o 
inch high should build from the upper midwest monday night and 
traverse lake ontario tuesday. this ridge should exit slowly 
eastward tuesday night through wednesday as a cold front approaches 
from the northwest. a 30.1 inch high will build across the eastern 
great lakes region thursday.


loz063>065-160300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sat aug 15 2026

.tonight...northeast winds 10 to 15 knots becoming southeast.
waves 1 to 3 feet. 
.sunday...southeast winds 5 to 15 knots. a chance of showers
late. waves 1 to 3 feet subsiding to 1 foot or less. 
.sunday night...southeast winds 10 to 15 knots becoming
southwest. showers likely with a chance of thunderstorms in the
evening, then a chance of showers overnight. waves 1 to 3 feet. 
.monday...west winds 10 to 15 knots. a chance of showers in the
morning. waves 2 feet or less. 
.monday night...west winds 10 knots or less becoming north. waves
2 feet or less. 
.tuesday...northwest winds 10 knots or less becoming southwest
10 to 15 knots. waves 2 feet or less. 
.wednesday...southwest winds 5 to 15 knots becoming northwest.
showers likely with a chance of thunderstorms. waves 1 to 2 feet.
.thursday...northwest winds 5 to 10 knots becoming north. a
chance of showers during the day. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$