736
FZUS61 KBUF 231402
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 AM EDT Sat Aug 23 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 low will move to near James Bay today, then
will linger in place through Sunday while pushing a cold front
across the lake late Sunday and Sunday evening. A secondary frontal
boundary will cross the lake Monday, with troughing then remaining
across the lake through midweek.

LOZ062-232100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 AM EDT Sat Aug 23 2025

.THIS AFTERNOON...Southwest winds 10 knots or less increasing to
10 to 15 knots. Waves 2 feet or less.
.TONIGHT...Southwest winds 10 to 15 knots. A chance of showers
early, then a chance of showers and thunderstorms. A chance of
showers late. Waves 1 to 3 feet.
.SUNDAY...Southwest winds around 10 knots becoming west. A chance
of showers. Waves 1 to 2 feet.
.SUNDAY NIGHT...Southwest winds around 10 knots becoming west. A
chance of showers in the evening. Waves 1 to 2 feet.
.MONDAY...West winds 10 to 15 knots becoming northwest 15 to
20 knots. A chance of waterspouts. A chance of showers. Waves
2 to 4 feet building to 3 to 6 feet.
.TUESDAY...Northwest winds 15 to 20 knots diminishing to 10 to
15 knots. A chance of waterspouts. A chance of showers. Waves
3 to 5 feet subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 15 knots becoming west. A
chance of showers during the day. Waves 2 to 3 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063-232100-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
1002 AM EDT Sat Aug 23 2025

.THIS AFTERNOON...South winds 10 knots or less becoming southeast.
A chance of showers late. Waves 1 foot or less.
.TONIGHT...South winds 5 to 15 knots increasing to 15 to
20 knots. Showers likely with a chance of thunderstorms through
the early overnight, then a chance of showers and thunderstorms
late. Waves 1 to 3 feet.
.SUNDAY...Southwest winds 15 to 20 knots becoming west 5 to
15 knots. Showers likely with a chance of thunderstorms. Waves
1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots becoming west.
Showers likely with a chance of thunderstorms in the evening,
then a chance of showers overnight. A chance of waterspouts
overnight. Waves 1 to 2 feet.
.MONDAY...West winds 10 to 15 knots increasing to 15 to 20 knots.
A chance of waterspouts. A chance of showers. Waves 2 to 4 feet
building to 3 to 6 feet.
.TUESDAY...Northwest winds 15 to 20 knots diminishing to 10 to
15 knots. A chance of waterspouts. A chance of showers. Waves
3 to 6 feet.
.WEDNESDAY...West winds 10 to 15 knots. A chance of showers
during the day. Waves 2 to 4 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ064-065-232100-
Lake Ontario open waters from Sodus Bay to the Saint Lawrence
River-
1002 AM EDT Sat Aug 23 2025

.THIS AFTERNOON...South winds 10 to 15 knots. A chance of showers
late. Waves 2 feet or less.
.TONIGHT...South winds 10 to 15 knots increasing to 15 to
20 knots. Showers likely with a chance of thunderstorms. Waves
2 feet or less building to 2 to 4 feet.
.SUNDAY...South winds 15 to 20 knots becoming southwest 5 to
15 knots. Showers likely with a chance of thunderstorms. Waves
2 to 4 feet subsiding to 1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots. Showers likely
with a chance of thunderstorms in the evening, then a chance of
showers overnight. A chance of waterspouts overnight. Waves 1 to
2 feet.
.MONDAY...West winds 10 to 15 knots increasing to 15 to 20 knots.
A chance of waterspouts. A chance of showers. Waves 2 to 4 feet
building to 3 to 6 feet.
.TUESDAY...West winds 15 to 20 knots becoming northwest 10 to
15 knots. A chance of waterspouts. A chance of showers. Waves
3 to 6 feet.
.WEDNESDAY...Northwest winds 10 to 15 knots becoming west. A
chance of showers during the day. Waves 1 to 3 feet building to
2 to 4 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-232100-
MAFOR 2315/
ONTARIO WEST 1/2 12500 14510 11510 11610. A chance of showers and
thunderstorms tonight. A chance of showers Sunday morning. Waves
2 feet or less this afternoon. Waves 1 to 3 feet tonight and
Sunday morning.

ONTARIO EAST 1/2 13410 11416 11426 11420 11426 11526. A chance of
thunderstorms this evening. Waves 2 feet or less this afternoon.
Waves 2 feet or less building to 2 to 4 feet tonight. Waves 2 to
4 feet Sunday morning.

$$