229
FZUS61 KBUF 031402
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 AM EDT Wed Sep 3 2025

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 30.0 inch high along the eastern seaboard today will
move east into the Atlantic tonight. A 29.3 inch low will then reach
northwest Ontario province tonight and stall through Friday, with
its trailing cold front crossing the Lake Thursday. Another 29.3
inch low will cross the central Great Lakes Friday, pushing a
secondary cold front east across the Lake Friday night. The two low
pressure systems will then merge over northern Quebec Saturday.

LOZ062-032100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 AM EDT Wed Sep 3 2025

.THIS AFTERNOON...South winds 10 knots or less becoming southeast
10 to 15 knots. Waves 2 feet or less.
.TONIGHT...Southeast winds 10 to 15 knots becoming south 15 to
20 knots. Waves 1 to 3 feet.
.THURSDAY...South winds 15 to 20 knots becoming west. Showers
with a chance of thunderstorms. Waves 2 to 4 feet building to
3 to 5 feet, then subsiding to 2 to 4 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots becoming south. Waves
2 to 4 feet subsiding to 1 to 2 feet.
.FRIDAY...South winds 15 to 20 knots becoming west. Waves 2 to
4 feet building to 5 to 9 feet, then subsiding to 4 to 7 feet.
Waves occasionally around 11 feet.
.SATURDAY...West winds 10 to 15 knots. Waves 2 to 4 feet.
.SUNDAY...West winds 10 to 15 knots becoming northwest. Waves
1 to 2 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-032100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 AM EDT Wed Sep 3 2025

.THIS AFTERNOON...South winds 5 to 10 knots becoming east. Waves
1 foot or less.
.TONIGHT...Southeast winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. Waves 1 foot or less building to
3 to 5 feet.
.THURSDAY...South winds 15 to 25 knots becoming west. Showers
with a chance of thunderstorms. Waves 3 to 5 feet.
.THURSDAY NIGHT...West winds 15 to 20 knots becoming southwest
and diminishing to 5 to 10 knots. Showers in the evening, then a
chance of showers overnight. Waves 2 to 4 feet subsiding to 1 to
3 feet.
.FRIDAY...South winds 15 to 20 knots becoming west. A chance of
showers Friday night. Waves 1 to 3 feet building to 4 to 7 feet.
Waves occasionally around 9 feet.
.SATURDAY...West winds 10 to 15 knots. A chance of showers during
the day. Waves 3 to 5 feet subsiding to 1 to 3 feet.
.SUNDAY...West winds 10 to 15 knots becoming northwest. Waves
1 to 3 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-032100-
MAFOR 0315/
ONTARIO WEST 1/2 11300 11210 12310 13420 11426. A chance of
thunderstorms Thursday morning. Waves 2 feet or less this
afternoon. Waves 1 to 3 feet building to 2 to 4 feet tonight.
Waves 2 to 4 feet Thursday morning.

ONTARIO EAST 1/2 11300 11200 11300 11310 13420 11430. Waves 1
foot or less this afternoon. Waves 1 foot or less building to 3
to 5 feet tonight. Waves 3 to 5 feet Thursday morning.

$$