776
FZUS61 KBUF 190802
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Sat Sep 19 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 30.4 inches
over the Lake will slowly drift to the east through tonight. During
Sunday night, a cold front will sweep southward across the lake.
Behind the front, a ridge averaging 30.4 inches should build from
northern Ontario through Monday. By Monday night through Tuesday, a
low of 30.0 inches should move from near the Lower Ohio Valley
toward the Mid-Atlantic States and extend a weak trough averaging
30.3 inches over the eastern Great Lakes.

LOZ062-191500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Sat Sep 19 2026

.TODAY...East winds 15 to 20 knots. Waves 2 to 4 feet.
.TONIGHT...East winds 15 to 20 knots becoming southeast 5 to
15 knots. A chance of showers after midnight. Waves 2 to 4 feet
subsiding to 1 to 3 feet.
.SUNDAY...East winds 10 to 15 knots becoming northeast. Showers
likely. Waves 1 to 3 feet.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots increasing to
15 to 25 knots. Waves 1 to 3 feet building to 3 to 5 feet.
.MONDAY...Northeast winds 15 to 25 knots. Waves 3 to 6 feet
building to 4 to 7 feet. Waves occasionally around 9 feet.
.TUESDAY...East winds 20 to 25 knots. Waves 5 to 8 feet. Waves
occasionally around 10 feet.
.WEDNESDAY...East winds 15 to 25 knots. A chance of showers.
Waves 4 to 7 feet subsiding to 3 to 5 feet. Waves occasionally
around 9 feet.

$$

LOZ063>065-191500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Sat Sep 19 2026

.TODAY...East winds 5 to 15 knots becoming northeast. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TONIGHT...East winds 5 to 15 knots becoming southeast. A chance
of showers late. Waves 2 feet or less.
.SUNDAY...Southeast winds 10 to 15 knots becoming northeast 15 to
20 knots. Showers. Waves 1 to 3 feet building to 2 to 4 feet.
.SUNDAY NIGHT...Northeast winds 15 to 20 knots. Waves 2 to 4 feet
building to 3 to 6 feet.
.MONDAY...Northeast winds 15 to 25 knots. Waves 3 to 6 feet.
.TUESDAY...East winds 15 to 25 knots. Waves 3 to 6 feet.
.WEDNESDAY...East winds 15 to 20 knots. A chance of showers
Wednesday night. Waves 3 to 5 feet subsiding to 2 to 4 feet.

$$

LOZ061-191500-
MAFOR 1909/
ONTARIO WEST 1/2 11220 14210 11210 11310 11300. A chance of
showers overnight. Waves 2 to 4 feet today. Waves 2 to 4 feet
subsiding to 1 to 3 feet tonight.

ONTARIO EAST 1/2 11110 11210 11200 12100 11200 11300 11310. Waves
2 to 4 feet subsiding to 1 to 3 feet today. Waves 2 feet or less
tonight.

$$