042
FZUS61 KBUF 012002
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 PM EDT Mon Sep 1 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 30.3 inch high centered over New England will slide
out across the Canadian Maritimes Tuesday. A weaker 30.1 inch high
will remain in place across the Great Lakes Tuesday before drifting
off the New England coast Wednesday. A 29.5 inch low over Ontario
Province Wednesday will then slowly make its way to James Bay
Thursday and Friday and 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.

LOZ062-020300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 PM EDT Mon Sep 1 2025

.TONIGHT...East winds 10 knots or less becoming southeast. Waves
1 foot or less.
.TUESDAY...Southeast winds less than 10 knots becoming east.
Waves 1 foot or less.
.TUESDAY NIGHT...Southeast winds 10 knots or less becoming
southwest. Waves 1 foot or less.
.WEDNESDAY...Southwest winds 10 knots or less becoming southeast.
Waves 1 foot or less.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots becoming south
15 to 20 knots. Waves 1 to 3 feet building to 2 to 4 feet.
.THURSDAY...South winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. Showers with a chance of
thunderstorms during the day, then showers Thursday night. Waves
3 to 6 feet subsiding to 2 to 4 feet.
.FRIDAY...Southwest winds 10 to 15 knots increasing to 15 to
25 knots. A chance of showers Friday night. Waves 2 to 3 feet
building to 3 to 6 feet.
.SATURDAY...West winds 15 to 20 knots. Waves 3 to 6 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-020300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 PM EDT Mon Sep 1 2025

.TONIGHT...Northeast winds less than 10 knots. Waves 1 foot or
less.
.TUESDAY...Southeast winds less than 10 knots. Waves 1 foot or
less.
.TUESDAY NIGHT...Light and variable winds becoming south 5 to
10 knots. Waves 1 foot or less.
.WEDNESDAY...South winds 10 knots or less becoming southeast.
Waves 1 foot or less.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots becoming south
15 to 20 knots. Waves 2 feet or less building to 3 to 5 feet.
.THURSDAY...South winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. Showers. Waves 3 to 5 feet
subsiding to 2 to 4 feet.
.FRIDAY...Southwest winds 10 to 15 knots increasing to 15 to
25 knots. A chance of showers. Waves 2 to 4 feet building to 3 to
6 feet.
.SATURDAY...West winds 15 to 20 knots. A chance of showers. Waves
3 to 6 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-020300-
MAFOR 0121/
ONTARIO WEST 1/2 13200 13300 12200. Waves 1 foot or less.

ONTARIO EAST 1/2 11800 11100 11200 12300 11400 11300 11800. Waves
1 foot or less.

$$