365
FZUS61 KBUF 120803
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
403 AM EDT Wed Aug 12 2026

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 30.0 inch high will shift east of the Lake this morning, before a
trough averaging 29.7 inches moves over the Lake this afternoon,
where it will linger through Thursday. A cold front then sweeps
across the Lake Thursday night, with a 30.2 inch high pressure ridge
building in from the upper Great Lakes on Friday, settling over the
lower Great Lakes region on Saturday. A low averaging 29.8 inches is
expected to approach the Lake Sunday.

LOZ062-121500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
403 AM EDT Wed Aug 12 2026

.TODAY...Light and variable winds. A chance of showers and
thunderstorms early this afternoon. Showers likely with a chance
of thunderstorms late. Waves 1 foot or less.
.TONIGHT...Southwest winds less than 10 knots becoming northwest.
A chance of showers and thunderstorms early. Waves 1 foot or
less.
.THURSDAY...Northwest winds 10 knots or less becoming west. Waves
1 foot or less.
.THURSDAY NIGHT...West winds 10 knots or less becoming north.
Waves 1 foot or less.
.FRIDAY...North winds 5 to 10 knots becoming northeast. Waves
1 foot or less.
.SATURDAY...Northeast winds 5 to 10 knots becoming southeast. A
chance of showers Saturday night. Waves 1 foot or less.
.SUNDAY...Southeast winds 5 to 10 knots becoming northwest.
Showers likely with a chance of thunderstorms. Waves 2 feet or
less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-121500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
403 AM EDT Wed Aug 12 2026

.TODAY...West winds 10 knots or less. A chance of showers and
thunderstorms late. Waves 1 foot or less.
.TONIGHT...West winds 5 to 10 knots. A chance of showers and
thunderstorms in the evening. Waves 1 foot or less.
.THURSDAY...Northwest winds 10 knots or less becoming west. Waves
1 foot or less.
.THURSDAY NIGHT...West winds 5 to 10 knots becoming north. Waves
1 foot or less.
.FRIDAY...North winds 5 to 10 knots becoming northeast. Waves
1 foot or less.
.SATURDAY...Northeast winds 10 knots or less becoming south.
Waves 1 foot or less.
.SUNDAY...Southeast winds 5 to 10 knots becoming northwest.
Showers likely with a chance of thunderstorms. Waves 2 feet or
less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-121500-
MAFOR 1209/
ONTARIO WEST 1/2 11700 12600 11700 11500 12600 11700. A chance of
showers and thunderstorms this afternoon and evening. Waves 1
foot or less.

ONTARIO EAST 1/2 11700 14600 11500 12600. A chance of showers and
thunderstorms this evening. Waves 1 foot or less.

$$