fzus61 kbuf 122003
glflo 
expires:202610130300;;987088

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt mon oct 12 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 ridge averaging 29.8 inches will slide eastward across 
the lower great lakes tonight. a cold front will sweep southeast 
across the lake on tuesday. behind the cold front, a ridge averaging 
30.2 inches builds from northern ontario through thursday. a low 
averaging 29.5 inches may move across the great lakes region friday. 
there is uncertainity 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 saturday through sunday.


loz062-130300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt mon oct 12 2026

.tonight...southwest winds 5 to 15 knots becoming south. showers
likely with a chance of thunderstorms late. waves 2 feet or less.
.tuesday...south winds 5 to 15 knots becoming southwest 15 to
20 knots. showers likely with a chance of thunderstorms. waves
2 feet or less building to 2 to 4 feet. 
.tuesday night...southwest winds 15 to 20 knots becoming
northwest 10 to 15 knots. a chance of showers and thunderstorms
in the evening. waves 2 to 4 feet subsiding to 1 to 2 feet. 
.wednesday...west winds 10 to 15 knots becoming northwest. waves
1 to 2 feet. 
.wednesday night...northwest winds 15 to 20 knots becoming north
10 to 15 knots. waves 1 to 3 feet. 
.thursday...northeast winds 5 to 15 knots becoming southeast.
showers thursday night. waves 1 to 2 feet. 
.friday...southwest winds 15 to 20 knots becoming northwest and
increasing to 30 knots. showers during the day, then showers
likely friday night. waves 1 to 3 feet building to 7 to 11 feet.
waves occasionally around 14 feet. 
.saturday...northwest winds to 30 knots becoming west and
diminishing to 15 to 20 knots. waves 6 to 10 feet subsiding to
3 to 6 feet. waves occasionally around 13 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 122003
glflo 
expires:202610130300;;987089

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt mon oct 12 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 ridge averaging 29.8 inches will slide eastward across 
the lower great lakes tonight. a cold front will sweep southeast 
across the lake on tuesday. behind the cold front, a ridge averaging 
30.2 inches builds from northern ontario through thursday. a low 
averaging 29.5 inches may move across the great lakes region friday. 
there is uncertainity 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 saturday through sunday.


loz063>065-130300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt mon oct 12 2026

.tonight...south winds 5 to 15 knots. showers likely with a
chance of thunderstorms late. waves 2 feet or less. 
.tuesday...south winds 5 to 15 knots. showers with a chance of
thunderstorms. waves 2 feet or less. 
.tuesday night...southwest winds 10 to 15 knots becoming
northwest. showers likely with a chance of thunderstorms in the
evening, then a chance of showers overnight. waves 1 to 3 feet. 
.wednesday...northwest winds 10 to 15 knots becoming west. waves
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 15 to 20 knots becoming southeast.
showers likely thursday night. waves 1 to 3 feet. 
.friday...south winds 15 to 20 knots becoming northwest and
increasing to 35 knot gales. showers. waves 3 to 5 feet building
to 10 to 13 feet. waves occasionally around 16 feet. 
.saturday...northwest winds to 30 knots becoming west. a chance
of showers during the day. waves 8 to 12 feet subsiding to 5 to
8 feet. waves occasionally around 15 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 122003
glfsl 
expires:202610130300;;987123

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt mon oct 12 2026


slz022-024-130300-
saint lawrence river from cape vincent to saint regis
403 pm edt mon oct 12 2026

.tonight...north winds 10 to 15 knots becoming northeast 15 to
20 knots. showers.
.tuesday...northeast winds 5 to 15 knots. rain showers with a
chance of thunderstorms. 
.tuesday night...northeast winds 10 knots or less becoming
northwest. showers with a chance of thunderstorms in the evening.
.wednesday...northwest winds 10 knots or less becoming west.
mostly cloudy. 
.wednesday night...northwest winds 10 knots or less. 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 5 to
15 knots. a chance of rain showers during the day. 

winds and waves higher in and near thunderstorms.

$$