648
FZUS61 KBUF 121401
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1001 AM EDT Sat Sep 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 high pressure ridge averaging 30.0 inches will move
off the east coast today. A warm front will sweep northeastward
across the lake this evening before a cold front sweeps eastward
across the lake on Sunday. Behind the cold front, a ridge averaging
30.2 inches will slide eastward across the Lower Great Lakes through
Monday. The ridge should exit toward New England on Tuesday and
allow a warm front to sweep northeastward across the lake. On
Wednesday, a cold front should sweep eastward across the lake and be
followed by a ridge averaging 30.1 inches and building from the
Upper Midwest.

LOZ062-122100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1001 AM EDT Sat Sep 12 2026

.THIS AFTERNOON...South winds 5 to 10 knots becoming east. Waves
1 foot or less.
.TONIGHT...Southeast winds 5 to 15 knots becoming southwest. A
chance of showers through the early overnight. Waves 1 to 3 feet.
.SUNDAY...West winds 5 to 15 knots. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northwest winds 15 to 20 knots. A chance of
showers. Waves 1 to 3 feet building to 3 to 5 feet, then
subsiding to 2 to 4 feet.
.MONDAY...North winds 5 to 15 knots becoming southeast 10 knots
or less. Waves 2 to 4 feet subsiding to 2 feet or less.
.TUESDAY...South winds 5 to 15 knots becoming southwest. A chance
of showers. Waves 2 feet or less.
.WEDNESDAY...West winds 10 knots or less becoming northeast. A
chance of showers during the day, then showers likely Wednesday
night. Waves 1 foot or less.

$$

LOZ063>065-122100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1001 AM EDT Sat Sep 12 2026

.THIS AFTERNOON...South winds 15 to 20 knots becoming southeast
10 to 15 knots. Waves 1 to 3 feet.
.TONIGHT...South winds 15 to 20 knots. Showers likely with a
chance of thunderstorms through the early overnight, then a
chance of showers late. Waves 1 to 3 feet building to 2 to
4 feet.
.SUNDAY...Southwest winds 15 to 20 knots becoming west 10 to
15 knots. Waves 1 to 3 feet.
.SUNDAY NIGHT...West winds 10 to 15 knots becoming northwest
15 to 20 knots. A chance of showers. Waves 2 to 4 feet building
to 3 to 5 feet.
.MONDAY...North winds 15 to 20 knots becoming southeast 5 to
15 knots. Waves 3 to 5 feet subsiding to 1 foot or less.
.TUESDAY...South winds 15 to 25 knots. A chance of showers
Tuesday night. Waves 1 to 3 feet building to 2 to 4 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots becoming southeast
10 knots or less. A chance of showers. Waves 1 to 3 feet
subsiding to 1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-122100-
MAFOR 1215/
ONTARIO WEST 1/2 11310 11200 11300 11410 12510 12610. A chance of
showers this evening. Waves 1 foot or less this afternoon. Waves
1 to 3 feet tonight and Sunday morning.

ONTARIO EAST 1/2 11410 11310 11410 11426 12420 11520 11510. A
chance of thunderstorms tonight. Waves 1 to 3 feet this
afternoon. Waves 1 to 3 feet building to 2 to 4 feet tonight.
Waves 1 to 3 feet Sunday morning.

$$