851
FZUS61 KBUF 171402
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 AM 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 30.2 inch high will settle over the lower Great Lakes
today, before sliding off the East Coast Saturday. Meanwhile, a
29.1 inch surface low will track across northwestern Ontario into
Hudson Bay tonight and Saturday while pushing a warm front across
the lake this afternoon through Saturday morning. A developing 29.5
inch low over the Ohio Valley Saturday will strengthen to 29.3
inches as it moves northeast along a stationary boundary through the
central Great Lakes Saturday night and Sunday. Another 29.5 inch low
is then forecast to develop over the upper Ohio Valley Sunday night,
then move east across the lower Great Lakes into western New England
by late Monday, while pushing a cold front across the lake Sunday
night. Brief ridging of 29.9 inches will then sweep across the lake
Tuesday.

LOZ062-172100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 AM EDT Fri Oct 17 2025

.THIS AFTERNOON...South winds less than 10 knots becoming
northwest. Waves 1 foot or less.
.TONIGHT...South winds 10 knots or less. A chance of showers in
the evening, then showers likely after midnight. A chance of
showers late. Waves 1 foot or less.
.SATURDAY...South winds 5 to 15 knots becoming southeast. A
chance of showers. Waves 2 feet or less.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots becoming south
15 to 20 knots. A chance of showers in the evening, then showers
likely overnight. Waves 1 to 3 feet.
.SUNDAY...South winds 15 to 25 knots becoming southwest to
30 knots. Showers. Waves 2 to 4 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 9 to 12 feet subsiding to 3 to 5 feet. Waves
occasionally around 15 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west to
30 knots. Showers. Waves 3 to 5 feet building to 6 to 9 feet.
Waves occasionally around 11 feet.

$$

LOZ063>065-172100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 AM EDT Fri Oct 17 2025

.THIS AFTERNOON...North winds 10 knots or less becoming northwest.
Waves 1 foot or less.
.TONIGHT...West winds 10 knots or less becoming south. A chance
of showers. Waves 1 foot or less.
.SATURDAY...South winds 10 to 15 knots becoming southeast. A
chance of showers. 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 to 30 knots becoming south. Showers.
Waves 5 to 8 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. Waves 10 to 13 feet subsiding to 4 to 7 feet.
Waves occasionally around 16 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west to
30 knots. Showers. Waves 3 to 5 feet building to 6 to 10 feet.
Waves occasionally around 13 feet.

$$

LOZ061-172100-
MAFOR 1715/
ONTARIO WEST 1/2 11500 11600 11500 14400 11410. A chance of
showers tonight and Saturday morning. Waves 2 feet or less.

ONTARIO EAST 1/2 11800 11700 11600 11500 12400 12410. A chance of
showers this evening. Waves 2 feet or less.

$$