902
FZUS61 KBUF 180202
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 PM EDT Fri Oct 17 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 30.0 inch high will slowly exit off to our east
tonight and then off the eastern sea board Saturday. A developing
29.5 inch low over the Ohio Valley Saturday will strengthen to 29.3
inches, this as it moves northeast along a stationary boundary
through Sunday. Another 29.5 inch low is then forecast to develop
over the upper Ohio Valley Sunday night, it then move east across
the lower Great Lakes into western New England, all while pushing a
cold front across the lakes. Surface high pressure builds northeast
across the Ohio Valley and the Lower Lakes on Monday ahead of a 29.4
inch low tracking across Lake Superior through Tuesday. This low
will weaken 29.6 inches and broaden as it heads east Tuesday night
into the day Wednesday.

LOZ062-180900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 PM EDT Fri Oct 17 2025

.OVERNIGHT...South winds 5 to 15 knots. A chance of
showers. Waves 1 foot or less.
.SATURDAY...South winds 10 to 15 knots becoming southeast. A
chance of showers early. Waves 2 feet or less.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots becoming south. A
chance of showers. Waves 1 to 3 feet.
.SUNDAY...South winds 15 to 25 knots. Showers. Waves 2 to 4 feet
building to 3 to 6 feet.
.SUNDAY NIGHT...South winds to 30 knots becoming west. Showers.
Waves 5 to 8 feet building to 6 to 10 feet. Waves occasionally
around 13 feet.
.MONDAY...West winds to 30 knots becoming southwest and
diminishing to 15 to 20 knots. Showers during the day, then a
chance of showers Monday night. Waves 9 to 12 feet subsiding to
3 to 5 feet. Waves occasionally around 15 feet.
.TUESDAY...South winds 15 to 20 knots becoming west and
increasing to 30 knots. Showers. Waves 3 to 5 feet building to
6 to 9 feet. Waves occasionally around 11 feet.
.WEDNESDAY...West winds to 30 knots diminishing to 15 to
25 knots. Showers likely. Waves 7 to 11 feet subsiding to 4 to
7 feet. Waves occasionally around 14 feet.

$$

LOZ063>065-180900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 PM EDT Fri Oct 17 2025

.OVERNIGHT...South winds 5 to 15 knots. A chance of
showers. Waves 1 foot or less.
.SATURDAY...South winds 10 to 15 knots becoming southeast. Waves
1 to 3 feet.
.SATURDAY NIGHT...Southeast winds 15 to 25 knots becoming south.
A chance of showers. Waves 1 to 3 feet building to 3 to 6 feet.
.SUNDAY...Southeast winds 15 to 25 knots increasing to 30 knots.
A chance of showers in the morning, then showers in the
afternoon. Waves 5 to 8 feet. Waves occasionally around 10 feet.
.SUNDAY NIGHT...South winds to 30 knots becoming southwest.
Showers. Waves 5 to 9 feet building to 7 to 10 feet. Waves
occasionally around 13 feet.
.MONDAY...West winds to 30 knots becoming southwest 15 to
25 knots. Showers during the day, then a chance of showers Monday
night. Waves 10 to 13 feet subsiding to 4 to 7 feet. Waves
occasionally around 16 feet.
.TUESDAY...South winds 15 to 25 knots becoming southwest to
30 knots. Showers. Waves 3 to 5 feet building to 6 to 10 feet.
Waves occasionally around 13 feet.
.WEDNESDAY...West winds to 30 knots diminishing to 15 to
25 knots. Showers. Waves 8 to 12 feet subsiding to 7 to 10 feet.
Waves occasionally around 15 feet.

$$

LOZ061-180900-
MAFOR 1803/
ONTARIO WEST 1/2 12400 13410 11310 11300 11410. A chance of
showers overnight and Saturday evening. Waves 2 feet or less
overnight and Saturday. Waves 1 to 3 feet Saturday evening.

ONTARIO EAST 1/2 11400 13410 13310 11420. Waves 1 foot or less
overnight. Waves 1 to 3 feet Saturday. Waves 1 to 3 feet building
to 2 to 4 feet Saturday evening.

$$