FZUS61 KBUF 240202
GLFLO 

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 PM EDT Sun Aug 23 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 continues to sweep eastward across Lake 
Ontario this evening. Behind the front, a trough averaging 29.8 
inches lingers over Lake Ontario through Monday. On Tuesday through 
Wednesday, a ridge averaging 30.1 inches builds from the western and 
central Great Lakes. The ridge should begin to exit eastward on 
Thursday and allow a warm front to sweep northeastward across Lake 
Ontario. On Friday, a cold front should sweep eastward across the 
lake and be followed by a high pressure ridge averaging 30.0 inches 
and building from the Upper Midwest.

LOZ062-240900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 PM EDT Sun Aug 23 2026

.REST OF TONIGHT...West winds 15 to 20 knots. A chance of
waterspouts. A chance of showers. Waves 3 to 5 feet. 
.MONDAY...Southwest winds 15 to 25 knots becoming west. A chance
of waterspouts. A chance of showers early, then showers likely
from late morning on. Waves 3 to 6 feet building to 4 to 7 feet.
Waves occasionally around 9 feet. 
.MONDAY NIGHT...West winds 15 to 20 knots. A chance of
waterspouts. Showers likely in the evening, then showers
overnight. Waves 3 to 6 feet subsiding to 2 to 4 feet. 
.TUESDAY...Northwest winds 15 to 20 knots becoming west 10 to
15 knots. A chance of waterspouts. Showers. Waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.TUESDAY NIGHT...West winds 10 knots or less. Waves 2 feet or
less. 
.WEDNESDAY...Southwest winds 10 knots or less becoming south.
Waves 1 foot or less. 
.THURSDAY...South winds 10 to 15 knots becoming west. A chance of
showers and thunderstorms. Waves 2 feet or less. 
.FRIDAY...West winds 5 to 15 knots becoming northwest. Waves 1 to
2 feet. 

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-240900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 PM EDT Sun Aug 23 2026

.REST OF TONIGHT...West winds 15 to 20 knots becoming southwest.
A chance of waterspouts. Showers with a chance of thunderstorms
late this evening, then showers after midnight. A chance of
showers late. Waves 4 to 7 feet subsiding to 3 to 6 feet. Waves
occasionally around 9 feet. 
.MONDAY...Southwest winds 15 to 20 knots. A chance of
waterspouts. A chance of showers in the morning, then showers
with a chance of thunderstorms in the afternoon. Waves 3 to
6 feet building to 4 to 7 feet. Waves occasionally around 9 feet.
.MONDAY NIGHT...Southwest winds 15 to 20 knots becoming west. A
chance of waterspouts. Showers with a chance of thunderstorms in
the evening, then showers overnight. Waves 3 to 6 feet. 
.TUESDAY...Northwest winds 15 to 20 knots becoming west. A chance
of waterspouts. Showers. Waves 3 to 5 feet subsiding to 2 to
4 feet. 
.TUESDAY NIGHT...West winds 5 to 15 knots. A chance of
waterspouts in the evening. Waves 2 to 4 feet subsiding to 1 to
3 feet. 
.WEDNESDAY...Southwest winds 10 knots or less becoming south and
increasing to 15 to 20 knots. Waves 1 foot or less building to
1 to 3 feet. 
.THURSDAY...South winds 15 to 20 knots becoming southwest 10 to
15 knots. A chance of showers and thunderstorms during the day,
then showers likely with a chance of thunderstorms Thursday
night. Waves 1 to 3 feet. 
.FRIDAY...West winds 5 to 15 knots becoming northwest. A chance
of showers during the day. Waves 1 to 2 feet. 

Winds and waves higher in and near thunderstorms.

$$

LOZ061-240900-
MAFOR 2403/
ONTARIO WEST 1/2 12620 12520 11536 11636 11626 11620. A chance of
waterspouts. Waves 3 to 5 feet overnight. Waves 3 to 6 feet
building to 4 to 7 feet, and occasionally around 9 feet Monday.
Waves 3 to 6 feet Monday evening. 

ONTARIO EAST 1/2 11626 14520 12526 11626. A chance of
waterspouts. Waves 3 to 6 feet. 

$$