967
FZUS61 KBUF 210202
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 PM 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 central Pennsylvania will continue
to drift southeastward tonight, while Hurricane Erin curves
north/northeastward, with center of the storm remaining well off the
North 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. A secondary frontal boundary
will cross the lakes Monday.

LOZ062-210900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 PM EDT Wed Aug 20 2025

.OVERNIGHT...Northeast winds 15 to 25 knots. Waves 4 to
7 feet. Waves occasionally around 9 feet.
.THURSDAY...Northeast winds 15 to 20 knots becoming east 10 to
15 knots. Waves 3 to 6 feet subsiding to 2 to 4 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots becoming northeast.
Waves 1 to 3 feet.
.FRIDAY...Northeast winds 10 knots or less becoming east. Waves
1 foot or less.
.FRIDAY NIGHT...Southeast winds 10 knots or less becoming south.
Waves 1 foot or less.
.SATURDAY...Southwest winds 5 to 15 knots. Showers likely with a
chance of thunderstorms Saturday night. Waves 2 feet or less.
.SUNDAY...Southwest winds 10 to 15 knots becoming west. Showers
likely with a chance of thunderstorms during the day, then a
chance of showers Sunday night. Waves 1 to 2 feet.
.MONDAY...West winds 10 to 15 knots. A chance of showers. Waves
1 to 3 feet building to 2 to 4 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063-210900-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
1002 PM EDT Wed Aug 20 2025

.OVERNIGHT...East winds 15 to 20 knots. Patchy fog.
Waves 3 to 6 feet.
.THURSDAY...East winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.THURSDAY NIGHT...East winds 5 to 10 knots becoming northeast.
Waves 1 to 2 feet.
.FRIDAY...Northeast winds 10 knots or less becoming west. Waves
1 foot or less.
.FRIDAY NIGHT...Southwest winds 10 knots or less becoming south.
Waves 1 foot or less.
.SATURDAY...South winds 5 to 15 knots. Showers likely with a
chance of thunderstorms Saturday night. Waves 1 foot or less
building to 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 15 knots. Showers likely with a
chance of thunderstorms. Waves 1 to 3 feet.
.MONDAY...Southwest winds 10 to 15 knots becoming west. A chance
of showers. Waves 1 to 3 feet building to 2 to 4 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ064-065-210900-
Lake Ontario open waters from Sodus Bay to the Saint Lawrence
River-
1002 PM EDT Wed Aug 20 2025

.OVERNIGHT...East winds 15 to 20 knots diminishing to 10 to
15 knots. Patchy fog. Waves 2 to 4 feet subsiding
to 1 to 3 feet.
.THURSDAY...East winds 5 to 15 knots becoming northeast. Waves
2 feet or less.
.THURSDAY NIGHT...Northeast winds 5 to 10 knots. Waves 1 foot or
less.
.FRIDAY...Northeast winds 10 knots or less becoming west. Waves
1 foot or less.
.FRIDAY NIGHT...West 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 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 with a chance of thunderstorms. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.MONDAY...Southwest winds 10 to 15 knots becoming west. A chance
of showers. Waves 1 to 3 feet building to 2 to 4 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-210900-
MAFOR 2103/
ONTARIO WEST 1/2 14120 11120 12210 11200. Waves 4 to 7 feet, and
occasionally around 9 feet overnight. Waves 3 to 6 feet subsiding
to 2 to 4 feet Thursday. Waves 1 to 3 feet Thursday evening.

ONTARIO EAST 1/2 11220 14210 11110 11100 11800. Waves 3 to 5 feet
subsiding to 2 to 4 feet overnight. Waves 2 to 4 feet subsiding
to 1 to 3 feet Thursday. Waves 2 feet or less Thursday evening.

$$