995
FZUS61 KBUF 210902
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EST Fri Nov 21 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 29.5 inch surface low near James Bay will swing a cold
front through the lower Great Lakes today, 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,
sending its cold front across the lake through the afternoon hours.
A 30.2 inch high is then forecast to build across the Ohio Valley
Monday. On Tuesday a 29.5 inch low to the north of Lake Superior
will swing a cold front across the Lake by Tuesday night.

LOZ062-211600-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EST Fri Nov 21 2025

.TODAY...Southwest winds 15 to 25 knots becoming west. Waves 3 to
6 feet.
.TONIGHT...West winds 10 to 15 knots becoming northwest. Waves
2 to 4 feet subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 5 to 10 knots becoming west. Waves
1 to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots becoming southwest.
Waves 1 to 2 feet.
.SUNDAY...Southwest winds 15 to 20 knots becoming west 10 to
15 knots. Waves 2 to 4 feet building to 3 to 5 feet, then
subsiding to 2 to 4 feet.
.MONDAY...West winds 5 to 10 knots becoming southeast. A chance
of showers Monday night. Waves 1 to 3 feet subsiding to 1 foot or
less.
.TUESDAY...Southeast winds 10 to 15 knots becoming southwest.
Showers. Waves 1 to 2 feet.

$$

LOZ063-211600-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
402 AM EST Fri Nov 21 2025

.TODAY...Southwest winds 15 to 25 knots becoming west to
30 knots. A chance of showers this morning. Waves 3 to 6 feet
building to 4 to 7 feet. Waves occasionally around 9 feet.
.TONIGHT...West winds 15 to 20 knots becoming northwest 10 to
15 knots. Waves 3 to 6 feet subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 10 to 15 knots. Waves 1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 10 to 15 knots becoming
southwest. Waves 1 to 2 feet.
.SUNDAY...Southwest winds 15 to 20 knots becoming west. A chance
of rain showers during the day. Waves 1 to 3 feet building to
3 to 5 feet.
.MONDAY...West winds 5 to 15 knots becoming southeast. Waves 2 to
4 feet subsiding to 1 to 2 feet.
.TUESDAY...Southeast winds 10 to 15 knots becoming south. Showers
likely. Waves 1 to 3 feet.

$$

LOZ064-065-211600-
Lake Ontario open waters from Sodus Bay to the Saint Lawrence
River-
402 AM EST Fri Nov 21 2025

.TODAY...Southwest winds 15 to 25 knots becoming west. A chance
of showers this morning. Waves 3 to 5 feet building to 4 to
7 feet. Waves occasionally around 9 feet.
.TONIGHT...West winds 15 to 20 knots becoming northwest 10 to
15 knots. Waves 3 to 6 feet subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 5 to 15 knots. Waves 1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 5 to 10 knots becoming
southwest. Waves 2 feet or less.
.SUNDAY...Southwest winds 15 to 20 knots becoming northwest. A
chance of rain showers. Waves 1 to 3 feet building to 3 to
6 feet.
.MONDAY...West winds 5 to 15 knots becoming southeast. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TUESDAY...Southeast winds 15 to 20 knots becoming south.
Showers. Waves 1 to 3 feet building to 2 to 4 feet.

$$

LOZ061-211600-
MAFOR 2110/
ONTARIO WEST 1/2 12530 13630 13710. A chance of showers early
this morning. Waves 2 to 4 feet building to 3 to 6 feet today.
Waves 3 to 5 feet subsiding to 1 to 3 feet tonight.

ONTARIO EAST 1/2 11520 11530 13630 13710. A chance of showers
this morning. Waves 1 to 3 feet building to 4 to 7 feet, and
occasionally around 9 feet today. Waves 3 to 6 feet subsiding to
1 to 3 feet tonight.

$$