864
FZUS61 KBUF 120203
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1003 PM EDT Tue Aug 11 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 weak 29.9 inch high will settle across the Lake through Wednesday
morning, before a trough averaging 29.7 inches moves over the Lake
Wednesday 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 approaching the Lake
Sunday.

LOZ062-120900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1003 PM EDT Tue Aug 11 2026

.OVERNIGHT...Northwest winds less than 10 knots. Waves
1 foot or less.
.WEDNESDAY...Northwest winds 10 knots or less becoming southwest.
A chance of showers and thunderstorms late. Waves 1 foot or less.
.WEDNESDAY NIGHT...West winds 10 knots or less. A chance of
showers and thunderstorms in the evening. Waves 1 foot or less.
.THURSDAY...West winds 5 to 10 knots. 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 15 knots becoming northeast. Waves
2 feet or less.
.SATURDAY...Northeast winds 10 knots or less becoming southeast.
Waves 1 foot or less.
.SUNDAY...South winds 5 to 10 knots becoming northwest. A chance
of showers and thunderstorms. Waves 2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-120900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1003 PM EDT Tue Aug 11 2026

.OVERNIGHT...West winds 10 knots or less. Waves 2 feet or
less.
.WEDNESDAY...West winds 10 knots or less. Waves 1 foot or less.
.WEDNESDAY NIGHT...West winds 5 to 10 knots. A chance of showers
and thunderstorms in the evening. Waves 1 foot or less.
.THURSDAY...Northwest winds 5 to 10 knots becoming west. Waves
2 feet or less.
.THURSDAY NIGHT...West winds 5 to 15 knots becoming north. Waves
1 to 2 feet.
.FRIDAY...North winds 5 to 15 knots becoming northeast. Waves
2 feet or less.
.SATURDAY...Northeast winds 10 knots or less becoming south.
Waves 1 foot or less.
.SUNDAY...South winds 5 to 10 knots becoming west. A chance of
showers and thunderstorms. Waves 2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-120900-
MAFOR 1203/
ONTARIO WEST 1/2 14700 11600 11500 12600. Waves 1 foot or less.

ONTARIO EAST 1/2 12700 15600. A chance of showers Wednesday
evening. Waves 2 feet or less.

$$