481
FZUS61 KBUF 200802
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Wed Aug 20 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 29.9 inch low over Lake Erie this early morning
will drift eastward, south of the state border today, while
Hurricane Erin curves north/northeastward, with center of the storm
remaining well off the Carolina coastline. A 30.1 inch high will
then build across the Great Lakes region Thursday through Friday
night. A 29.5 inch low will move near the western shore of James Bay
Saturday, and linger just to the east of James Bay Sunday while
pushing a cold front across the Lake Sunday night.

LOZ062-201500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Wed Aug 20 2025

.TODAY...East winds 15 to 25 knots becoming northeast. A chance
of showers. Waves 2 to 4 feet building to 3 to 6 feet.
.TONIGHT...Northeast winds 20 to 25 knots. Waves 5 to 8 feet.
Waves occasionally around 10 feet.
.THURSDAY...Northeast winds 15 to 25 knots becoming east and
diminishing to 10 to 15 knots. Waves 4 to 7 feet subsiding to
2 to 4 feet. Waves occasionally around 9 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots becoming northeast.
Waves 1 to 3 feet.
.FRIDAY...Northeast winds 10 knots or less becoming south. Waves
1 foot or less.
.SATURDAY...Southwest winds 5 to 15 knots. A chance of showers
Saturday night. Waves 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 15 knots becoming west. A chance
of showers. Waves 1 to 3 feet building to 2 to 4 feet.

$$

LOZ063-201500-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
402 AM EDT Wed Aug 20 2025

.TODAY...Southeast winds 15 to 20 knots becoming east. Showers
early, then a chance of showers from late morning on. Waves 2 to
4 feet building to 3 to 5 feet.
.TONIGHT...East winds 15 to 25 knots. A chance of showers early.
Waves 3 to 6 feet building to 4 to 7 feet, then subsiding to 3 to
6 feet. Waves occasionally around 9 feet.
.THURSDAY...East winds 15 to 20 knots becoming northeast 10 to
15 knots. Waves 3 to 6 feet subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Northeast winds 5 to 10 knots. Waves 1 to
2 feet.
.FRIDAY...Northeast winds 10 knots or less becoming south. Waves
1 foot or less.
.SATURDAY...South winds 5 to 15 knots becoming southwest 15 to
20 knots. Showers likely Saturday night. Waves 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 15 knots. Showers likely. Waves
1 to 3 feet.

$$

LOZ064-065-201500-
Lake Ontario open waters from Sodus Bay to the Saint Lawrence
River-
402 AM EDT Wed Aug 20 2025

.TODAY...Southeast winds 15 to 20 knots becoming east. Showers
early, then a chance of showers from late morning on. Waves 2 to
4 feet building to 3 to 5 feet, then subsiding to 2 to 4 feet.
.TONIGHT...East winds 15 to 20 knots. A chance of showers early.
Waves 2 to 4 feet building to 3 to 5 feet, then subsiding to 1 to
3 feet.
.THURSDAY...East winds 15 to 20 knots becoming northeast 5 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Northeast winds 5 to 10 knots. Waves 1 foot or
less.
.FRIDAY...Northeast winds 10 knots or less becoming south. Waves
1 foot or less.
.SATURDAY...South winds 5 to 15 knots increasing to 15 to
20 knots. Showers likely with a chance of thunderstorms Saturday
night. Waves 2 feet or less building to 2 to 4 feet.
.SUNDAY...South winds 15 to 20 knots becoming southwest 10 to
15 knots. Showers likely with a chance of thunderstorms. Waves
2 to 4 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-201500-
MAFOR 2009/
ONTARIO WEST 1/2 13220 11230 12130 12230. A chance of showers
this morning. Waves 2 to 4 feet building to 3 to 6 feet today.
Waves 5 to 8 feet, and occasionally around 10 feet tonight.

ONTARIO EAST 1/2 11326 12320 14220 11220. Waves 1 to 3 feet
building to 3 to 5 feet today. Waves 3 to 6 feet tonight.

$$