590
FZUS61 KBUF 022030
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
430 PM EDT Tue Sep 2 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 30.1 inch high over the eastern Great Lakes and
Northeast will gradually weaken while slowly drifting off the New
England coast by Thursday morning. Meanwhile, a 29.5 inch low over
western Ontario Province Wednesday will spin about to the west of
James Bay through Friday before slowly making its` way to James Bay
Friday night, then to northern Quebec Saturday...with an initial
trailing cold front crossing the Lake Thursday...and a secondary
cold front following sometime between Friday and Saturday.

LOZ062-030300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
430 PM EDT Tue Sep 2 2025

.TONIGHT...Southeast winds 10 knots or less becoming south. Waves
1 foot or less.
.WEDNESDAY...South winds 5 to 10 knots becoming southeast. Waves
1 foot or less.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots becoming south
15 to 20 knots. A chance of showers overnight. Waves 2 feet or
less building to 2 to 4 feet.
.THURSDAY...South winds 15 to 20 knots becoming west. Showers
with a chance of thunderstorms. Waves 3 to 5 feet.
.THURSDAY NIGHT...West winds 10 to 15 knots becoming southwest.
Showers in the evening. Waves 2 to 4 feet.
.FRIDAY...South winds 15 to 20 knots becoming west. Waves 2 to
4 feet building to 3 to 6 feet.
.SATURDAY...West winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 3 to 6 feet.
.SUNDAY...West winds 10 to 15 knots becoming northwest. Waves
2 to 4 feet subsiding to 1 to 3 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-030300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
430 PM EDT Tue Sep 2 2025

.TONIGHT...Southeast winds 10 knots or less becoming south. Waves
1 foot or less.
.WEDNESDAY...South winds 5 to 10 knots becoming east. Waves
2 feet or less.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots becoming south
and increasing to 15 to 25 knots overnight. Waves 1 foot or less
building to 3 to 5 feet.
.THURSDAY...South winds 15 to 25 knots becoming southwest.
Showers likely in the morning, then showers with a chance of
thunderstorms in the afternoon. Waves 3 to 6 feet.
.THURSDAY NIGHT...West winds 15 to 20 knots becoming southwest
10 to 15 knots. Showers in the evening, then a chance of showers
overnight. Waves 3 to 5 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 3 to 6 feet.
.SATURDAY...Southwest winds 15 to 20 knots becoming west 10 to
15 knots. A chance of showers during the day. Waves 3 to 6 feet.
.SUNDAY...West winds 10 to 15 knots. Waves 2 to 4 feet subsiding
to 1 to 3 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-030300-
MAFOR 0221/
ONTARIO WEST 1/2 12300 14400 11400 11200. Waves 1 foot or less.

ONTARIO EAST 1/2 11200 11300 14400 11400 11300. Waves 2 feet or
less.

$$