121
FZUS61 KBUF 200802
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Sun Sep 20 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...
An 29.9 inch inverted trough draped from the Ohio Valley to New York
State will drift southeastward and away from the lake this afternoon
and tonight as a 30.4 inch high builds southeastward across Ontario
Province. This high will then strengthen to 30.6 inches as it slowly
drifts across Quebec through Thursday.

LOZ062-201500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Sun Sep 20 2026

.TODAY...Northeast winds 5 to 15 knots. Waves 1 to 3 feet.
.TONIGHT...Northeast winds 5 to 10 knots increasing to 15 to
20 knots. Waves 1 to 2 feet building to 4 to 6 feet.
.MONDAY...Northeast winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 3 to 6 feet subsiding to 2 to 4 feet.
.MONDAY NIGHT...Northeast winds 15 to 20 knots. Waves 3 to
6 feet.
.TUESDAY...Northeast winds 15 to 25 knots becoming east. Waves
4 to 7 feet. Waves occasionally around 9 feet.
.WEDNESDAY...East winds 15 to 20 knots. Waves 3 to 6 feet.
.THURSDAY...East winds 15 to 20 knots becoming northeast 10 to
15 knots. Waves 3 to 5 feet subsiding to 2 to 4 feet.

$$

LOZ063>065-201500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Sun Sep 20 2026

.TODAY...East winds 5 to 15 knots becoming northeast. Showers
likely this morning. Waves 1 to 3 feet.
.TONIGHT...Northeast winds 10 to 15 knots increasing to 15 to
20 knots. Waves 1 to 3 feet building to 3 to 6 feet.
.MONDAY...Northeast winds 15 to 25 knots. Waves 3 to 6 feet
subsiding to 2 to 4 feet.
.MONDAY NIGHT...Northeast winds 15 to 20 knots. Waves 2 to 4 feet
building to 3 to 6 feet.
.TUESDAY...East winds 15 to 20 knots. Waves 3 to 6 feet.
.WEDNESDAY...East winds 15 to 20 knots. Waves 3 to 5 feet.
.THURSDAY...East winds 15 to 20 knots becoming northeast 10 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.

$$

LOZ061-201500-
MAFOR 2009/
ONTARIO WEST 1/2 11210 13110 12100 12120. Waves 1 to 3 feet
today. Waves 1 to 2 feet building to 3 to 5 feet tonight.

ONTARIO EAST 1/2 11300 11210 14110 12120. A chance of showers
this morning. Waves 1 to 3 feet today. Waves 1 to 3 feet building
to 3 to 5 feet tonight.

$$