568
FZUS61 KBUF 131402
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 AM EDT Mon Oct 13 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 29.6 inch low along the eastern seaboard will continue
to progress north to just offshore of the Delmarva today. Meanwhile,
a 30.5 inch high will remain in place over the Canadian Maritimes.
The east coast low will move east into the Atlantic Tuesday, while a
ridge of high pressure averaging 30.2 inches builds into the lower
Great Lakes. A cold front will move south across the lake Tuesday
night. An expansive 30.3 inch high will then build from the upper
Great Lakes Wednesday to Quebec and the lower Great Lakes Thursday
through Friday.

LOZ062-132100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 AM EDT Mon Oct 13 2025

.THIS AFTERNOON...East winds 15 to 20 knots. Waves 2 to 4 feet.
.TONIGHT...East winds 15 to 20 knots becoming northeast 5 to
15 knots. Waves 2 to 4 feet.
.TUESDAY...Northeast winds 5 to 15 knots becoming west. Waves
1 to 2 feet.
.TUESDAY NIGHT...Northwest winds 15 to 20 knots becoming north.
Waves 1 to 3 feet building to 3 to 5 feet.
.WEDNESDAY...North winds 15 to 20 knots. Waves 3 to 5 feet
subsiding to 2 to 4 feet.
.THURSDAY...North winds 5 to 15 knots becoming northeast. Waves
1 to 3 feet.
.FRIDAY...Southeast winds 10 knots or less becoming south. A
chance of showers Friday night. Waves 1 foot or less.

$$

LOZ063>065-132100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 AM EDT Mon Oct 13 2025

.THIS AFTERNOON...Northeast winds 15 to 20 knots. Scattered
showers. Waves 2 to 4 feet.
.TONIGHT...Northeast winds 15 to 20 knots diminishing to 5 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.TUESDAY...Northeast winds 5 to 15 knots becoming west. Waves
2 feet or less.
.TUESDAY NIGHT...West winds 15 to 25 knots becoming north. Waves
1 to 3 feet building to 3 to 6 feet.
.WEDNESDAY...North winds 15 to 25 knots. Waves 4 to 7 feet
subsiding to 3 to 5 feet. Waves occasionally around 9 feet.
.THURSDAY...North winds 15 to 20 knots becoming northeast 10 to
15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet.
.FRIDAY...Northeast winds 10 knots or less becoming south. A
chance of showers Friday night. Waves 1 foot or less.

$$

LOZ061-132100-
MAFOR 1315/
ONTARIO WEST 1/2 12210 11220 12210 12100 11800. Waves 2 to 4 feet
this afternoon and tonight. Waves 1 to 2 feet Tuesday morning.

ONTARIO EAST 1/2 11120 11120 19126 11220 12110 12100 11800. Waves
2 to 4 feet this afternoon. Waves 2 to 4 feet subsiding to 1 to 3
feet tonight. Waves 2 feet or less Tuesday morning.

$$