434
FZUS61 KBUF 172002
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 PM EDT Mon Aug 17 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 ridge of high pressure averaging 30.0 inches will
build over the lower Great Lakes tonight through Tuesday, then drift
to the eastern seaboard Wednesday. A cold front will cross the lake
Wednesday before another 30.1 inch high builds into the Great Lakes
Thursday through Friday.

LOZ062-180300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 PM EDT Mon Aug 17 2026

.TONIGHT...West winds 5 to 15 knots becoming north. Waves 2 feet
or less.
.TUESDAY...North winds 10 knots or less becoming southwest. Waves
1 foot or less.
.TUESDAY NIGHT...South winds 10 to 15 knots becoming southwest.
Showers likely overnight. Waves 2 feet or less.
.WEDNESDAY...Southwest winds 5 to 15 knots becoming west. Showers
likely. Waves 2 feet or less.
.WEDNESDAY NIGHT...West winds 5 to 10 knots becoming northwest.
Waves 2 feet or less.
.THURSDAY...Northwest winds 10 knots or less becoming north.
Waves 1 foot or less.
.FRIDAY...Northeast winds 10 knots or less becoming south. Waves
1 foot or less.
.SATURDAY...South winds 5 to 10 knots becoming southwest. A
chance of showers during the day, then showers likely Saturday
night. Waves 2 feet or less.

$$

LOZ063>065-180300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 PM EDT Mon Aug 17 2026

.TONIGHT...Northwest winds 5 to 15 knots becoming north. Waves
1 to 3 feet subsiding to 1 foot or less.
.TUESDAY...North winds 10 knots or less becoming west. Waves
1 foot or less.
.TUESDAY NIGHT...West winds 5 to 15 knots becoming southwest. A
chance of showers overnight. Waves 2 feet or less.
.WEDNESDAY...Southwest winds 10 to 15 knots becoming west.
Showers likely in the morning, then showers likely with a chance
of thunderstorms in the afternoon. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots becoming northwest. A
chance of showers in the evening. Waves 1 to 3 feet.
.THURSDAY...Northwest winds 5 to 10 knots. Waves 2 feet or less.
.FRIDAY...Northwest winds 10 knots or less becoming southeast.
Waves 1 foot or less.
.SATURDAY...South winds 5 to 15 knots. A chance of showers during
the day, then showers likely Saturday night. Waves 2 feet or
less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-180300-
MAFOR 1721/
ONTARIO WEST 1/2 11610 11700 11810 12800 11700 12600. Waves 1 to
3 feet tonight. Waves 1 foot or less Tuesday.

ONTARIO EAST 1/2 11710 11110 11100 12800 11700 12600. Waves 1 to
3 feet subsiding to 1 foot or less tonight. Waves 1 foot or less
Tuesday.

$$