930
FZUS61 KBUF 220802
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Sat Aug 22 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 30.1 inch high over New England this morning will
drift east across the Canadian Maritimes today. An elongated, and
slightly deepening 29.7 inch low will slowly make its way from the
central Great Lakes to western Quebec today and Sunday, while
pushing its associated warm and cold fronts across the lake between
to night and Sunday morning. The now 29.6 inch area of low pressure
will wobble across western Quebec through Monday, then eject
northeastward across Labrador on Tuesday while a 30.1 inch high
builds eastward across the Ohio Valley. This surface high will drift
across the southern mid-Atlantic states Wednesday, and to the east
coast by Wednesday night.

LOZ062-221500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Sat Aug 22 2026

.TODAY...Southeast winds 5 to 15 knots becoming east. A chance of
showers and thunderstorms late. Waves 1 to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots becoming southwest.
Showers with a chance of thunderstorms through the early
overnight, then showers likely late. A chance of waterspouts
after midnight. Waves 1 to 2 feet.
.SUNDAY...West winds 15 to 25 knots. A chance of waterspouts.
Showers likely in the morning, then showers likely with a chance
of thunderstorms in the afternoon. Waves 1 to 3 feet building to
3 to 6 feet.
.SUNDAY NIGHT...West winds 15 to 25 knots. A chance of
waterspouts. A chance of showers and thunderstorms in the
evening, then showers likely overnight. Waves 4 to 6 feet.
.MONDAY...West winds 15 to 25 knots. A chance of waterspouts.
Showers during the day, then a chance of showers Monday night.
Waves 5 to 8 feet subsiding to 3 to 5 feet. Waves occasionally
around 10 feet.
.TUESDAY...West winds 15 to 20 knots diminishing to less than
10 knots. A chance of waterspouts during the day. A chance of
showers during the day. Waves 2 to 4 feet subsiding to 1 foot or
less.
.WEDNESDAY...Southwest winds 10 knots or less becoming south.
Waves 1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-221500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Sat Aug 22 2026

.TODAY...Southeast winds 15 to 20 knots diminishing to 5 to
15 knots. Waves 2 to 4 feet subsiding to 1 foot or less.
.TONIGHT...Southeast winds 10 to 15 knots becoming south and
increasing to 15 to 25 knots. Showers likely with a chance of
thunderstorms. A chance of waterspouts after midnight. Waves 1 to
3 feet building to 3 to 5 feet.
.SUNDAY...South winds 15 to 25 knots becoming west. A chance of
waterspouts. Showers with a chance of thunderstorms. Waves 3 to
5 feet building to 3 to 6 feet.
.SUNDAY NIGHT...West winds 15 to 25 knots becoming southwest. A
chance of waterspouts. Showers likely with a chance of
thunderstorms in the evening, then showers overnight. Waves 3 to
6 feet building to 4 to 7 feet. Waves occasionally around 9 feet.
.MONDAY...Southwest winds to 30 knots becoming west 15 to
25 knots. A chance of waterspouts. Showers. Waves 4 to 7 feet
building to 6 to 9 feet, then subsiding to 4 to 7 feet. Waves
occasionally around 11 feet.
.TUESDAY...West winds 15 to 20 knots diminishing to 5 to
15 knots. A chance of waterspouts during the day. Showers likely
during the day, then a chance of showers Tuesday night. Waves
3 to 6 feet subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 5 to 15 knots becoming south. Waves
2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-221500-
MAFOR 2209/
ONTARIO WEST 1/2 11310 12300 12200 11406 12416. A chance of
waterspouts overnight. A chance of thunderstorms this evening.
Waves 1 to 3 feet.

ONTARIO EAST 1/2 11320 12310 11300 11310 11410 11420 11436. A
chance of waterspouts overnight. A chance of thunderstorms this
evening. Waves 2 to 4 feet subsiding to 1 foot or less today.
Waves 1 to 3 feet building to 3 to 5 feet tonight.

$$