738
FZUS61 KBUF 190803
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Tue Aug 19 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 30.4 inch high will slowly move east across central
Quebec tonight, while remaining ridged south/southwestward across
the Lower Great Lakes. At the same time, a 29.9 inch low will move
into the Central Great Lakes tonight, then will weaken and stall out
across the Lower Lakes Tuesday and Tuesday night. A lingering
surface trough will remain near the Lake Wednesday, while Hurricane
Erin curves north/northeastward, with center of the storm remaining
well off the Southeast and Carolina coastline. A 30.1 inch high will
then build across the Great Lakes region Thursday through Friday
night.

LOZ062-191500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Tue Aug 19 2025

.TODAY...Southeast winds 10 to 15 knots becoming east. A chance
of showers this afternoon. Waves 1 to 2 feet.
.TONIGHT...East winds 15 to 20 knots becoming southeast. Showers
with a chance of thunderstorms through the early overnight, then
showers likely late. Waves around 1 foot.
.WEDNESDAY...East winds 10 to 15 knots becoming northeast 15 to
20 knots. A chance of showers. Waves 1 foot or less.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots. A chance of
showers in the evening. Waves 1 to 3 feet.
.THURSDAY...Northeast winds 15 to 20 knots diminishing to 5 to
15 knots. Waves 1 to 3 feet.
.FRIDAY...Northeast winds 10 knots or less becoming south. Waves
around 1 foot.
.SATURDAY...Southwest winds 5 to 15 knots becoming west. A chance
of showers Saturday night. Waves 1 to 2 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-191500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Tue Aug 19 2025

.TODAY...Southeast winds 5 to 15 knots becoming east. A chance of
showers late. Waves 2 feet or less.
.TONIGHT...East winds 10 to 15 knots becoming southeast 15 to
20 knots. A chance of showers early, then showers with a chance
of thunderstorms. Showers late. Waves 1 to 3 feet.
.WEDNESDAY...Southeast winds 15 to 20 knots becoming east.
Showers in the morning, then showers likely in the afternoon.
Waves 1 to 3 feet subsiding to 1 foot or less.
.WEDNESDAY NIGHT...East winds 15 to 20 knots diminishing to 10 to
15 knots. A chance of showers in the evening. Waves 1 to 3 feet.
.THURSDAY...Northeast winds 5 to 15 knots. Waves 1 to 3 feet.
.FRIDAY...East 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 with a chance of thunderstorms Saturday
night. Waves 1 to 3 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-191500-
MAFOR 1909/
ONTARIO WEST 1/2 12310 11200 12210 11226 12326. Waves 1 to 2
feet.

ONTARIO EAST 1/2 13310 11200 11210 11220 12326. Waves 2 feet or
less today. Waves 1 to 3 feet tonight.

$$