fzus61 kbuf 042003
glflo 
expires:202610050300;;534641

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sun oct 4 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 29.7 inch low over northwest ontario will deepen to 
29.4 inches as it slides just south of james bay over central quebec 
tonight, while sending a pair of cold fronts across the lake. a 30.2 
inch high over the upper midwest will then build across the great 
lakes monday into tuesday, before sliding into the northeast 
wednesday. a cold front will then pass across the lake thursday. a 
30.1 inch surface high will then ridge north across the lake friday.


loz063>065-050300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sun oct 4 2026

.tonight...southwest winds 10 to 15 knots becoming northwest and
increasing to 15 to 25 knots. a chance of showers this evening,
then showers likely after midnight. a chance of showers late.
waves 1 to 3 feet building to 4 to 7 feet. waves occasionally
around 9 feet. 
.monday...northwest winds to 30 knots. waves 5 to 8 feet building
to 7 to 10 feet. waves occasionally around 13 feet. 
.monday night...northwest winds to 30 knots diminishing to 15 to
25 knots. waves 5 to 9 feet subsiding to 3 to 5 feet. waves
occasionally around 11 feet. 
.tuesday...northwest winds 5 to 15 knots becoming west. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday night...southwest winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. waves 1 to 3 feet building to 2 to
4 feet. 
.wednesday...southwest winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. a chance of showers. waves 3 to
5 feet subsiding to 2 to 4 feet. 
.thursday...west winds 15 to 20 knots. a chance of showers. waves
2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to
4 feet. 
.friday...west winds 10 to 15 knots becoming northwest. waves
2 to 4 feet. 

$$

fzus61 kbuf 042003
glfsl 
expires:202610050300;;534686

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt sun oct 4 2026


slz022-024-050300-
saint lawrence river from cape vincent to saint regis
403 pm edt sun oct 4 2026

.tonight...southwest winds 10 to 15 knots becoming west. showers
through the early overnight, then a chance of showers late. 
.monday...west winds 10 to 15 knots. mostly sunny in the morning,
then becoming partly sunny. 
.monday night...northwest winds 5 to 15 knots becoming west.
mostly cloudy in the evening, then clearing. 
.tuesday...west winds 5 to 10 knots. sunny.
.tuesday night...southwest winds 10 knots or less becoming south
10 to 15 knots. mainly clear in the evening, then becoming mostly
cloudy. 
.wednesday...south winds 5 to 15 knots becoming southwest. a
chance of showers. 
.thursday...southwest winds 5 to 15 knots. a chance of showers. 
.friday...southwest winds 10 knots or less becoming west. a
chance of rain showers. 

$$