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open lake forecast for lake ontario
national weather service buffalo ny
1003 am edt tue oct 13 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 cold front will sweep southeast across the lower 
great lakes this afternoon. behind the cold front, a ridge averaging 
30.2 inches will build in from northern ontario through thursday. a 
low averaging 29.5 inches may move across the great lakes region 
friday. there is uncertainty in the track of this low, with the 
potential of deepening as it crosses the region. a 30.5 inch high 
will build into the great lakes region this weekend.


loz063>065-132100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 am edt tue oct 13 2026

.rest of today...south winds 5 to 15 knots. showers with a chance
of thunderstorms. waves 2 feet or less. 
.tonight...southwest winds 10 to 15 knots becoming west. showers
likely with a chance of thunderstorms early, then a chance of
showers and thunderstorms late in the evening. waves 1 to 3 feet
building to 2 to 4 feet. 
.wednesday...northwest winds 10 to 15 knots becoming west. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.wednesday night...northwest winds 10 to 15 knots becoming north
15 to 20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.thursday...northeast winds 5 to 15 knots becoming southeast.
showers thursday night. waves 2 to 4 feet subsiding to 2 feet or
less. 
.friday...southwest winds 15 to 25 knots becoming northwest and
increasing to 35 knot gales. showers. waves 3 to 5 feet building
to 9 to 13 feet. waves occasionally around 16 feet. 
.saturday...northwest gales to 35 knots becoming west and
diminishing to 15 to 20 knots. a chance of rain showers during
the day. waves 10 to 13 feet subsiding to 4 to 7 feet. waves
occasionally around 16 feet. 

winds and waves higher in and near thunderstorms.

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt tue oct 13 2026


slz022-024-132100-
saint lawrence river from cape vincent to saint regis
1003 am edt tue oct 13 2026

.this afternoon...northeast winds 10 knots or less. showers with a
chance of thunderstorms. 
.tonight...northeast winds less than 10 knots becoming west.
showers with a chance of thunderstorms in the evening, then a
chance of showers after midnight. 
.wednesday...west winds 10 knots or less. mostly cloudy. 
.wednesday night...northwest winds 5 to 10 knots becoming north.
mostly cloudy. 
.thursday...north winds 10 knots or less becoming east. rain
showers likely thursday night. 
.friday...southeast winds 5 to 15 knots becoming northwest 15 to
20 knots. rain showers. 
.saturday...northwest winds 15 to 20 knots becoming west and
diminishing to less than 10 knots. a chance of rain showers
during the day. 

winds and waves higher in and near thunderstorms.

$$