829
FZUS61 KBUF 152002
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 PM EDT Sat Aug 15 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 30.2 inch ridge will move east acorss New England tonight. A 29.7
inch low will move southeast from the northern Great Lakes to
southern New England tonight through Monday. A warm front will drift
northeast across Lake Ontario late Sunday before a cold front sweeps
east across the lake Sunday night. Behind the cold front, a trough
averaging 29.8 inches should linger over Lake Ontario Monday. A 30.o
inch high should build from the Upper Midwest Monday night and
traverse Lake Ontario Tuesday. This ridge should exit slowly
eastward Tuesday night through Wednesday as a cold front approaches
from the northwest. A 30.1 inch high will build across the eastern
Great Lakes region Thursday.

LOZ062-160300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 PM EDT Sat Aug 15 2026

.TONIGHT...East winds 15 to 20 knots becoming southeast 10 to
15 knots. Waves 3 to 5 feet subsiding to 2 to 4 feet.
.SUNDAY...Southeast winds 5 to 15 knots becoming east. Waves 1 to
3 feet.
.SUNDAY NIGHT...East winds 10 knots or less becoming northwest. A
chance of showers and thunderstorms in the evening, then a chance
of showers overnight. Waves 1 foot or less.
.MONDAY...Northwest winds 5 to 10 knots becoming west. Waves
2 feet or less.
.MONDAY NIGHT...Northwest winds 5 to 10 knots. Waves 2 feet or
less.
.TUESDAY...West winds 10 knots or less becoming southwest 10 to
15 knots. A chance of showers Tuesday night. Waves 2 feet or
less.
.WEDNESDAY...West winds around 10 knots becoming northwest.
Showers likely with a chance of thunderstorms. Waves 1 to 2 feet.
.THURSDAY...Northwest winds 5 to 10 knots becoming north. Waves
1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-160300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 PM EDT Sat Aug 15 2026

.TONIGHT...Northeast winds 10 to 15 knots becoming southeast.
Waves 1 to 3 feet.
.SUNDAY...Southeast winds 5 to 15 knots. A chance of showers
late. Waves 1 to 3 feet subsiding to 1 foot or less.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots becoming
southwest. Showers likely with a chance of thunderstorms in the
evening, then a chance of showers overnight. Waves 1 to 3 feet.
.MONDAY...West winds 10 to 15 knots. A chance of showers in the
morning. Waves 2 feet or less.
.MONDAY NIGHT...West winds 10 knots or less becoming north. Waves
2 feet or less.
.TUESDAY...Northwest winds 10 knots or less becoming southwest
10 to 15 knots. Waves 2 feet or less.
.WEDNESDAY...Southwest winds 5 to 15 knots becoming northwest.
Showers likely with a chance of thunderstorms. Waves 1 to 2 feet.
.THURSDAY...Northwest winds 5 to 10 knots becoming north. A
chance of showers during the day. Waves 2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-160300-
MAFOR 1521/
ONTARIO WEST 1/2 12220 11320 13310 12200. Waves 3 to 5 feet
subsiding to 2 to 4 feet tonight. Waves 1 to 3 feet Sunday.

ONTARIO EAST 1/2 12110 11210 11300 12310 12300. Waves 1 to 3 feet
tonight. Waves 2 feet or less Sunday.

$$