409
FZUS61 KBUF 190203
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1003 PM EDT Fri Jul 18 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 drift east into New England
tonight, then off the New England coast Saturday. A 29.7 inch low is
then forecast to move from the western Great Lakes late Saturday to
New England by late Sunday, with its trailing cold front crossing
the Lake late Saturday night into Sunday morning. A 30.1 inch high
over James Bay Sunday night is then forecast to build slowly south
along the Ontario/Quebec border through Monday night, before
settling across the Lower Great Lakes and New England Tuesday, then
drifts off the southern New England coast Tuesday night into
Wednesday.

LOZ062-190900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1003 PM EDT Fri Jul 18 2025

.OVERNIGHT...Southeast winds 10 knots or less becoming
south. Waves 1 foot or less.
.SATURDAY...Southeast winds 10 knots or less becoming east. Waves
1 foot or less.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots becoming west.
Showers likely in the evening, then showers likely with a chance
of thunderstorms overnight. Waves 2 feet or less.
.SUNDAY...Northwest winds 5 to 10 knots. Showers likely with a
chance of thunderstorms in the morning. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northwest winds 15 to 20 knots becoming north.
Waves 1 to 3 feet.
.MONDAY...North winds 5 to 15 knots becoming east. Waves 1 to
3 feet subsiding to 1 foot or less.
.TUESDAY...East winds 5 to 10 knots becoming southeast. Waves
around 1 foot.
.WEDNESDAY...South winds 5 to 10 knots becoming southwest. A
chance of showers and thunderstorms Wednesday night. Waves 2 feet
or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-190900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1003 PM EDT Fri Jul 18 2025

.OVERNIGHT...South winds 10 knots or less. Waves 1 foot or
less.
.SATURDAY...South winds 10 knots or less becoming northeast.
Waves 1 foot or less.
.SATURDAY NIGHT...East winds 5 to 10 knots becoming southwest. A
chance of showers in the evening, then showers likely with a
chance of thunderstorms overnight. Waves 2 feet or less.
.SUNDAY...West winds 5 to 10 knots becoming northwest. Showers
likely with a chance of thunderstorms in the morning. Waves 1 to
2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 15 knots becoming north
15 to 20 knots. Waves 1 to 3 feet building to 2 to 4 feet.
.MONDAY...North winds 15 to 20 knots becoming east and
diminishing to 5 to 10 knots. Waves 2 to 4 feet subsiding to
2 feet or less.
.TUESDAY...East winds 10 knots or less becoming southeast. Waves
1 foot or less.
.WEDNESDAY...South winds 5 to 15 knots becoming southwest. A
chance of showers and thunderstorms Wednesday night. Waves 2 feet
or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-190900-
MAFOR 1903/
ONTARIO WEST 1/2 12400 12300 13200 11300. A chance of showers
Saturday evening. Waves 1 foot or less.

ONTARIO EAST 1/2 14400 11300 12100 11200. Waves 1 foot or less.

$$