464
FZUS61 KBUF 201502
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 AM EST Thu Nov 20 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 over the lower Great Lakes will slide
out across New England through tonight. A 29.5 inch surface low near
James Bay will swing a cold front east across the lake Friday, with
a 30.1 inch high building over the Ohio Valley and lower Great Lakes
Saturday. A 29.5 inch low will then move from northern Ontario to
James Bay Sunday, while pushing its warm front across the lake
Saturday night, followed by its trailing cold front Sunday. A 30.2
inch high is forecast to build across the Ohio Valley Monday.

LOZ062-202200-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 AM EST Thu Nov 20 2025

.THIS AFTERNOON...Southeast winds 10 knots or less becoming east.
Waves 1 foot or less.
.TONIGHT...Southeast winds 10 knots or less becoming southwest
10 to 15 knots. Waves 2 feet or less.
.FRIDAY...Southwest winds 10 to 15 knots becoming west. Waves
1 to 3 feet building to 2 to 4 feet.
.FRIDAY NIGHT...West winds 10 to 15 knots becoming northwest.
Waves 1 to 3 feet.
.SATURDAY...North winds 5 to 10 knots becoming southwest. Waves
2 feet or less.
.SUNDAY...Southwest winds 15 to 20 knots becoming west. Waves
1 to 3 feet building to 3 to 5 feet.
.MONDAY...West winds 15 to 20 knots becoming southeast and
diminishing to 5 to 10 knots. Waves 2 to 4 feet subsiding to 1 to
3 feet.

$$

LOZ063-202200-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
1002 AM EST Thu Nov 20 2025

.THIS AFTERNOON...Southeast winds 5 to 10 knots. Waves 1 foot or
less.
.TONIGHT...Southeast winds 5 to 15 knots becoming southwest.
Waves 2 feet or less.
.FRIDAY...Southwest winds 15 to 20 knots becoming west. Waves
1 to 3 feet building to 2 to 4 feet.
.FRIDAY NIGHT...West winds 10 to 15 knots becoming northwest.
Waves 2 to 4 feet.
.SATURDAY...North winds 5 to 15 knots becoming west. Waves 1 to
3 feet.
.SUNDAY...Southwest winds 10 to 15 knots becoming west 15 to
20 knots. Waves 1 to 2 feet building to 3 to 6 feet.
.MONDAY...West winds 15 to 20 knots becoming southeast 10 to
15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet.

$$

LOZ064-065-202200-
Lake Ontario open waters from Sodus Bay to the Saint Lawrence
River-
1002 AM EST Thu Nov 20 2025

.THIS AFTERNOON...Southeast winds 10 knots or less. Waves 1 foot
or less.
.TONIGHT...Southeast winds 5 to 15 knots becoming southwest.
Waves 1 to 3 feet.
.FRIDAY...South winds 15 to 20 knots becoming west. A chance of
showers. Waves 2 to 4 feet building to 3 to 5 feet.
.FRIDAY NIGHT...West winds 10 to 15 knots becoming northwest. A
chance of rain showers in the evening. Waves 2 to 4 feet
subsiding to 1 to 3 feet.
.SATURDAY...North winds 5 to 15 knots becoming west. Waves 1 to
3 feet.
.SUNDAY...Southwest winds 10 to 15 knots becoming west 15 to
20 knots. A chance of rain showers. Waves 1 to 3 feet building to
3 to 6 feet.
.MONDAY...Northwest winds 15 to 20 knots becoming south 10 to
15 knots. A chance of rain showers. Waves 3 to 6 feet subsiding
to 1 to 3 feet.

$$

LOZ061-202200-
MAFOR 2016/
ONTARIO WEST 1/2 13300 12500 13510. Waves 2 feet or less this
afternoon and tonight. Waves 1 to 3 feet Friday morning.

ONTARIO EAST 1/2 13300 11400 12510 12520. A chance of showers
Friday morning. Waves 1 foot or less this afternoon. Waves 1 to 3
feet tonight. Waves 2 to 4 feet Friday morning.

$$