287
FZUS61 KBUF 202102
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 PM 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.

LOZ062-210400-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 PM EST Thu Nov 20 2025

.TONIGHT...Southeast winds 5 to 15 knots becoming southwest 15 to
20 knots. Waves 1 to 3 feet.
.FRIDAY...Southwest winds 15 to 20 knots becoming west. Waves
3 to 6 feet.
.FRIDAY NIGHT...West winds 10 to 15 knots becoming northwest.
Waves 2 to 4 feet.
.SATURDAY...Northwest winds 5 to 15 knots. Waves 1 to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 10 knots becoming
southwest. Waves around 1 foot.
.SUNDAY...Southwest winds 15 to 20 knots becoming west 10 to
15 knots. Waves 1 to 3 feet building to 2 to 4 feet.
.MONDAY...West winds 10 to 15 knots becoming southeast. A chance
of showers Monday night. Waves 1 to 3 feet.
.TUESDAY...Southeast winds 10 to 15 knots becoming southwest
15 to 20 knots. Rain during the day, then showers likely Tuesday
night. Waves 1 to 3 feet building to 2 to 4 feet.

$$

LOZ063-210400-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
402 PM EST Thu Nov 20 2025

.TONIGHT...Southeast winds 5 to 15 knots becoming southwest 15 to
20 knots. Waves 1 to 3 feet.
.FRIDAY...Southwest winds 15 to 20 knots becoming west. Waves
2 to 4 feet building to 3 to 6 feet.
.FRIDAY NIGHT...West winds 15 to 20 knots becoming northwest
10 to 15 knots. Waves 3 to 5 feet subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 10 to 15 knots. Waves 1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 5 to 10 knots becoming west.
Waves 1 to 2 feet.
.SUNDAY...Southwest winds 10 to 15 knots becoming west 15 to
20 knots. Waves 1 to 3 feet building to 3 to 5 feet.
.MONDAY...Northwest winds 15 to 20 knots becoming southeast.
Waves 3 to 5 feet subsiding to 1 to 3 feet.
.TUESDAY...Southeast winds 15 to 20 knots becoming south. Rain
likely during the day, then showers likely Tuesday night. Waves
2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to
4 feet.

$$

LOZ064-065-210400-
Lake Ontario open waters from Sodus Bay to the Saint Lawrence
River-
402 PM EST Thu Nov 20 2025

.TONIGHT...Southeast winds 5 to 15 knots becoming southwest 15 to
20 knots. Waves 2 feet or less building to 2 to 4 feet.
.FRIDAY...South winds 15 to 25 knots becoming west. A chance of
showers late in the morning. Waves 3 to 6 feet building to 4 to
7 feet. Waves occasionally around 9 feet.
.FRIDAY NIGHT...West winds 15 to 20 knots becoming northwest
10 to 15 knots. Waves 3 to 6 feet subsiding to 2 to 4 feet.
.SATURDAY...North winds 5 to 15 knots becoming northwest. Waves
1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 5 to 10 knots becoming west.
Waves 2 feet or less.
.SUNDAY...Southwest winds 10 to 15 knots becoming northwest 15 to
20 knots. A chance of rain showers. Waves 1 to 3 feet building to
3 to 5 feet.
.MONDAY...Northwest winds 15 to 20 knots becoming southeast.
Waves 3 to 5 feet subsiding to 1 to 3 feet.
.TUESDAY...Southeast winds 15 to 25 knots becoming south. Rain
likely during the day, then showers Tuesday night. Waves 2 to
4 feet building to 3 to 6 feet.

$$

LOZ061-210400-
MAFOR 2022/
ONTARIO WEST 1/2 11200 11400 11500 11510 12520 12620. Waves 1 to
3 feet tonight. Waves 3 to 6 feet Friday.

ONTARIO EAST 1/2 11200 12410 12520 12530 11620. Waves 2 feet or
less building to 2 to 4 feet tonight. Waves 3 to 6 feet building
to 4 to 7 feet, and occasionally around 9 feet Friday.

$$