638
FZUS61 KBUF 121438
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1038 AM EDT Wed Mar 12 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 30.2 inch high will build south across the lake
today before sliding to the Canadian Maritimes Thursday. A 28.8
inch low over the Plains States Friday will then lift northeast
to Lake Superior Friday night and Saturday, then to James Bay on
Sunday. The low will push its trailing cold front across the lake
Sunday.

LOZ062-122115-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1038 AM EDT Wed Mar 12 2025

.THIS AFTERNOON...East winds 10 to 15 knots increasing to 15 to
20 knots. Waves 2 to 4 feet building to 3 to 5 feet.
.TONIGHT...East winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 3 to 5 feet.
.THURSDAY...East winds 5 to 15 knots becoming northeast. Waves
2 to 4 feet subsiding to 1 to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 10 knots. Waves 1 to 2
feet.
.FRIDAY...East winds 10 to 15 knots. Waves 1 to 3 feet.
.SATURDAY...Southeast winds 15 to 20 knots becoming south.
Showers likely. Waves 2 to 4 feet.
.SUNDAY...South winds 15 to 25 knots becoming west. Rain showers.
Waves 3 to 5 feet.

$$

LOZ063>065-122115-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1038 AM EDT Wed Mar 12 2025

.THIS AFTERNOON...Northeast winds 10 to 15 knots. Waves 1 to
3 feet.
.TONIGHT...Northeast winds 10 to 15 knots. Waves 1 to 3 feet.
.THURSDAY...East winds 10 to 15 knots. Waves 1 to 3 feet.
.THURSDAY NIGHT...East winds 5 to 10 knots becoming southeast.
Waves 1 foot or less.
.FRIDAY...Southeast winds increasing to 15 to 20 knots. Waves
building to 2 to 4 feet.
.SATURDAY...Southeast winds 15 to 25 knots. Showers likely. Waves
3 to 6 feet.
.SUNDAY...South winds 15 to 25 knots becoming west. Rain showers.
Waves 3 to 6 feet.

$$

LOZ061-122115-
MAFOR 1215/
ONTARIO WEST 1/2 11210 12220 14210 11210. Waves 2 to 4 feet
building to 3 to 5 feet this afternoon. Waves 3 to 5 feet
subsiding to 2 to 4 feet tonight. Waves 2 to 4 feet Thursday
morning.

ONTARIO EAST 1/2 15110 12210. Waves 1 to 3 feet.

$$