335
FZUS61 KBUF 180802
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Thu Sep 18 2025

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...High pressure averaging 30.0 inches draped from the Ohio
Valley to New England will gradually weaken in place today. A weak
cold front will then cross the lake this evening, with another 30.4
inch high then settling from central Ontario to New England Friday
through Saturday night, then off the New England coast Sunday and
Monday.

LOZ062-181500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Thu Sep 18 2025

.TODAY...West winds 5 to 10 knots becoming southwest. Patchy fog
early. Waves 1 foot or less.
.TONIGHT...West winds 5 to 15 knots becoming northeast. A chance
of sprinkles after midnight. Waves 1 to 3 feet.
.FRIDAY...Northeast winds 5 to 15 knots becoming east less than
10 knots. Waves 1 to 3 feet subsiding to 1 foot or less.
.FRIDAY NIGHT...East winds 5 to 15 knots increasing to 15 to
20 knots. Waves 2 feet or less building to 3 to 5 feet.
.SATURDAY...East winds 15 to 20 knots. Waves 3 to 5 feet
subsiding to 2 to 4 feet.
.SUNDAY...Southeast winds 10 to 15 knots becoming south. A chance
of showers Sunday night. Waves 1 to 3 feet.
.MONDAY...Southwest winds 10 to 15 knots. A chance of showers.
Waves 1 to 2 feet.

$$

LOZ063>065-181500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Thu Sep 18 2025

.TODAY...Southwest winds 5 to 10 knots becoming west. Waves
2 feet or less.
.TONIGHT...West winds 5 to 15 knots becoming north 15 to
20 knots. A chance of sprinkles from late evening on. Waves 1 to
3 feet building to 2 to 4 feet.
.FRIDAY...North winds 15 to 20 knots diminishing to 5 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 10 to 15 knots becoming northeast
15 to 20 knots. Waves 1 to 3 feet building to 2 to 4 feet.
.SATURDAY...Northeast winds 15 to 20 knots becoming southeast
10 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.SUNDAY...Southeast winds 15 to 20 knots becoming south. Waves
1 to 3 feet building to 2 to 4 feet.
.MONDAY...South winds 15 to 20 knots becoming southwest 10 to
15 knots. A chance of showers. Waves 2 to 4 feet subsiding to
1 to 3 feet.

$$

LOZ061-181500-
MAFOR 1809/
ONTARIO WEST 1/2 14600 11600 11700 11810 11110. Waves 2 feet or
less today. Waves 1 to 3 feet tonight.

ONTARIO EAST 1/2 12500 13600 11700 12810. Waves 2 feet or less
today. Waves 1 to 3 feet building to 2 to 4 feet tonight.

$$