578
FZUS61 KBUF 110803
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
403 AM 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 today 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.

LOZ062-111500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
403 AM EDT Tue Aug 11 2026

.TODAY...West winds 5 to 10 knots becoming southwest. Waves
1 foot or less.
.TONIGHT...West winds less than 10 knots becoming north. Waves
1 foot or less.
.WEDNESDAY...Light and variable winds. A chance of showers in the
afternoon. Waves 1 foot or less.
.WEDNESDAY NIGHT...Northeast winds 10 knots or less becoming
northwest. A chance of showers. Waves 1 foot or less.
.THURSDAY...Northwest winds 5 to 10 knots. Waves 2 feet or less.
.FRIDAY...North winds 5 to 15 knots. Waves 1 to 2 feet.
.SATURDAY...North winds 10 knots or less becoming south. Waves
1 foot or less.

$$

LOZ063>065-111500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
403 AM EDT Tue Aug 11 2026

.TODAY...Northwest winds 5 to 10 knots becoming west. Waves
2 feet or less.
.TONIGHT...West winds 10 knots or less becoming northwest. Waves
2 feet or less.
.WEDNESDAY...Northwest winds 10 knots or less becoming west.
Waves 1 foot or less.
.WEDNESDAY NIGHT...Northwest winds 5 to 10 knots. A chance of
showers. Waves 1 foot or less.
.THURSDAY...Northwest winds 5 to 15 knots. Waves 2 feet or less.
.FRIDAY...Northwest winds 5 to 15 knots becoming north. Waves
1 to 2 feet.
.SATURDAY...North winds 10 knots or less becoming south. Waves
2 feet or less.

$$

LOZ061-111500-
MAFOR 1109/
ONTARIO WEST 1/2 14600 11600 12700 11800. Waves 1 foot or less.

ONTARIO EAST 1/2 11700 14600 11600 12700. Waves 2 feet or less.

$$