274
FZUS61 KBUF 151402
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 AM 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 impact Lake Ontario today before the ridge
begins to exit eastward 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.

LOZ062-152100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 AM EDT Sat Aug 15 2026

.THIS AFTERNOON...East winds 10 to 15 knots. Waves 1 to 3 feet.
.TONIGHT...East winds 10 to 15 knots becoming southeast. Waves
1 to 3 feet.
.SUNDAY...Southeast winds 5 to 15 knots becoming east. A chance
of showers in the afternoon. Waves 1 to 3 feet.
.SUNDAY NIGHT...Southeast winds 10 knots or less becoming
northwest. A chance of showers. Waves 1 foot or less.
.MONDAY...Northwest winds 5 to 10 knots. Waves 1 foot or less.
.TUESDAY...West winds 10 knots or less becoming southwest 10 to
15 knots. Waves 2 feet or less.
.WEDNESDAY...Southwest winds 10 to 15 knots becoming northwest.
Showers likely. Waves 1 to 3 feet.

$$

LOZ063>065-152100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 AM EDT Sat Aug 15 2026

.THIS AFTERNOON...East winds 5 to 10 knots becoming northeast.
Waves 1 foot or less.
.TONIGHT...Northeast winds 5 to 15 knots becoming southeast.
Waves 2 feet or less.
.SUNDAY...Southeast winds 5 to 15 knots. Showers likely with a
chance of thunderstorms in the afternoon. Waves 2 feet or less.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots becoming
northwest. Showers with a chance of thunderstorms in the evening,
then showers overnight. Waves 2 feet or less.
.MONDAY...Northwest winds 5 to 10 knots. A chance of showers
during the day. Waves 2 feet or less.
.TUESDAY...West winds 10 knots or less becoming southwest 10 to
15 knots. Waves 2 feet or less.
.WEDNESDAY...South winds 5 to 15 knots becoming west. A chance of
showers during the day, then showers likely Wednesday night.
Waves 1 to 3 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-152100-
MAFOR 1515/
ONTARIO WEST 1/2 14210 14310. Waves 1 to 3 feet.

ONTARIO EAST 1/2 13100 12200 13310. Waves 2 feet or less.

$$