fzus61 kbuf 302002
glfsl 
expires:202607310300;;351220

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
402 pm edt thu jul 30 2026


slz022-024-310300-
saint lawrence river from cape vincent to saint regis
402 pm edt thu jul 30 2026

.tonight...northwest winds less than 10 knots. scattered showers
early. patchy fog from late evening on. 
.friday...light and variable winds becoming west 5 to 10 knots.
patchy fog early. 
.friday night...southwest winds less than 10 knots becoming
south. partly to mostly cloudy. 
.saturday...south winds less than 10 knots becoming southwest. a
chance of showers. 
.saturday night...light and variable winds. a chance of showers
and thunderstorms in the evening, then showers likely with a
chance of thunderstorms overnight. 
.sunday...southeast winds 10 knots or less becoming northwest.
showers with a chance of thunderstorms. 
.monday...northwest winds 5 to 10 knots becoming light and
variable. a chance of showers. 
.tuesday...south winds less than 10 knots. mainly clear, then
becoming partly cloudy. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 302001
glflo 
expires:202607310300;;351164

open lake forecast for lake ontario
national weather service buffalo ny
401 pm edt thu jul 30 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 weak trough averaging 29.6 inches exits eastward while a ridge 
averaging 30.0 inches builds from the western great lakes through 
tonight. the ridge exits slowly eastward friday through saturday 
before a cold front sweeps eastward across lake ontario on sunday. 
in the wake of the front, a 30.0 inch high builds over the western 
great lakes builds southeast across the lower great lakes region 
for monday and tuesday.


loz063>065-310300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
401 pm edt thu jul 30 2026

.tonight...west winds 5 to 15 knots. waves 2 feet or less. 
.friday...west winds 10 knots or less. waves 1 foot or less. 
.friday night...southwest winds 10 knots or less becoming south.
waves 1 foot or less. 
.saturday...south winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.saturday night...east winds 10 knots or less becoming southeast.
a chance of showers in the evening, then showers likely
overnight. waves 1 foot or less. 
.sunday...south winds 5 to 15 knots becoming north. showers with
a chance of thunderstorms. waves 2 feet or less. 
.monday...north winds 5 to 15 knots. waves 2 feet or less. 
.tuesday...southeast winds 10 knots or less becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$