423
FZUS61 KBUF 050802
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Sun Oct 5 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 large 30.3 inch high will remain anchored near the
Mid-Atlantic coast through Monday. A cold front will then push
southeast across the lower Great Lakes between Tuesday afternoon and
early Tuesday evening. This will be followed by a strong 30.4 inch
high that will build from the upper Great Lakes Wednesday to the
lower Great Lakes and New England Thursday.

LOZ062-051500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Sun Oct 5 2025

.TODAY...Southwest winds 10 knots or less becoming southeast.
Waves 1 foot or less.
.TONIGHT...Southeast winds 5 to 10 knots becoming southwest.
Waves 1 foot or less.
.MONDAY...Southwest winds 10 to 15 knots increasing to 15 to
20 knots. Waves 1 to 3 feet.
.MONDAY NIGHT...Southwest winds 15 to 20 knots diminishing to
10 to 15 knots. Showers likely overnight. Waves 1 to 3 feet.
.TUESDAY...Southwest winds 15 to 20 knots becoming northwest.
Showers. Waves 2 to 4 feet.
.WEDNESDAY...North winds 15 to 20 knots becoming northeast. Waves
3 to 5 feet subsiding to 2 to 4 feet.
.THURSDAY...East winds 5 to 15 knots becoming southeast. Waves
1 to 3 feet.

$$

LOZ063>065-051500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Sun Oct 5 2025

.TODAY...South winds 5 to 10 knots becoming east. Waves 2 feet or
less.
.TONIGHT...Southeast winds 5 to 15 knots becoming south. Waves
1 foot or less building to 1 to 3 feet.
.MONDAY...South winds 5 to 15 knots. Waves 1 to 3 feet.
.MONDAY NIGHT...South winds 5 to 15 knots increasing to 15 to
20 knots. A chance of showers overnight. Waves 1 to 3 feet.
.TUESDAY...Southwest winds 15 to 20 knots becoming northwest.
Showers. Waves 2 to 4 feet building to 3 to 5 feet.
.WEDNESDAY...North winds 15 to 20 knots becoming northeast. A
chance of showers during the day. Waves 3 to 5 feet subsiding to
2 to 4 feet.
.THURSDAY...Northeast winds 15 to 20 knots becoming south. Waves
2 to 4 feet subsiding to 1 to 3 feet.

$$

LOZ061-051500-
MAFOR 0509/
ONTARIO WEST 1/2 12500 11400 13300 12400. Waves 2 feet or less.

ONTARIO EAST 1/2 13400 11300 11200 11300 12410. Waves 2 feet or
less today. Waves 1 foot or less building to 1 to 3 feet tonight.

$$