fzus61 kbuf 292004
glfsl 
expires:202607300300;;295142

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
404 pm edt wed jul 29 2026


slz022-024-300300-
saint lawrence river from cape vincent to saint regis
404 pm edt wed jul 29 2026

.tonight...north winds 5 to 10 knots becoming northeast. showers
likely early, then a chance of showers. 
.thursday...northeast winds 5 to 10 knots becoming north. a
chance of showers and thunderstorms in the afternoon. 
.thursday night...north winds less than 10 knots. a chance of
showers in the evening. patchy fog. 
.friday...light and variable winds. patchy fog in the morning. 
.friday night...southwest winds less than 10 knots becoming
south. partly cloudy in the evening, then becoming mostly cloudy.
.saturday...southwest winds less than 10 knots. a chance of
showers saturday night. 
.sunday...south winds less than 10 knots becoming west. showers
likely with a chance of thunderstorms. 
.monday...northwest winds less than 10 knots. a chance of showers
during the day. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 292003
glflo 
expires:202607300300;;295045

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt wed jul 29 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 lingers over lake ontario 
through tonight. on thursday, the trough begins to exit eastward 
while a ridge averaging 30.0 inches builds from the western great 
lakes through thursday night. the ridge exits slowly eastward friday 
through saturday before a cold front sweeps eastward across lake 
ontario on sunday. in the wake of the cold frontal passage, a 30.0 
inch high over the upper great lakes sunday, will slowly build 
southeast across the central and lower great lakes sunday night 
through tuesday.


loz062-300300-
lake ontario open waters from the niagara river to hamlin beach-
403 pm edt wed jul 29 2026

.tonight...northwest winds 15 to 20 knots becoming north 10 to
15 knots. waves 1 to 3 feet. 
.thursday...north winds 5 to 15 knots becoming west. waves 1 to
3 feet subsiding to 1 foot or less. 
.thursday night...west winds 10 knots or less becoming northwest.
waves 1 foot or less. 
.friday...west winds less than 10 knots becoming southwest. waves
1 foot or less. 
.friday night...southwest winds less than 10 knots. waves 1 foot
or less. 
.saturday...south winds less than 10 knots becoming northeast. a
chance of showers saturday night. waves 1 foot or less. 
.sunday...northeast winds 10 knots or less becoming north. a
chance of showers. waves 1 foot or less. 
.monday...north winds 10 knots or less becoming northwest. waves
1 foot or less. 

$$

fzus61 kbuf 292003
glflo 
expires:202607300300;;295046

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt wed jul 29 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 lingers over lake ontario 
through tonight. on thursday, the trough begins to exit eastward 
while a ridge averaging 30.0 inches builds from the western great 
lakes through thursday night. the ridge exits slowly eastward friday 
through saturday before a cold front sweeps eastward across lake 
ontario on sunday. in the wake of the cold frontal passage, a 30.0 
inch high over the upper great lakes sunday, will slowly build 
southeast across the central and lower great lakes sunday night 
through tuesday.


loz063>065-300300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt wed jul 29 2026

.tonight...north winds 10 to 15 knots. showers likely this
evening, then a chance of showers after midnight. waves 1 to
3 feet. 
.thursday...north winds 5 to 15 knots becoming northwest. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.thursday night...west winds 10 knots or less becoming northwest.
waves 1 foot or less. 
.friday...northwest winds 10 knots or less becoming west. 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. a chance of showers
saturday night. waves 1 foot or less. 
.sunday...south winds 5 to 10 knots becoming north. showers
likely with a chance of thunderstorms. waves 1 foot or less. 
.monday...north winds 10 knots or less becoming west. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$