632
FZUS61 KBUF 170802
GLFLO

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

LOZ062-171500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Fri Oct 17 2025

.TODAY...East winds 10 knots or less 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>065-171500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Fri Oct 17 2025

.TODAY...Northeast winds 10 knots or less becoming northwest.
Waves 2 feet 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.

$$

LOZ061-171500-
MAFOR 1709/
ONTARIO WEST 1/2 11100 11300 11500 11600 11500 13400. A chance of
showers tonight. Waves 2 feet or less.

ONTARIO EAST 1/2 11100 12800 11700 11600 11500 12400. A chance of
showers this evening. Waves 2 feet or less.

$$