102
FZUS61 KBUF 172002
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 PM EDT Thu Sep 17 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 weak front stalled just south of the lake this evening
will move southeast and away from the lake overnight. A 30.3 inch
high will then build from northwest Ontario province Friday to
southern Quebec Saturday, then off the New England coast Saturday
night. A weak 29.9 inch low is then forecast to move east across
Ohio and Pennsylvania late Saturday night through Sunday. Another
30.3 inch high will then build from northwest Ontario province
Sunday night to Quebec by Tuesday and Wednesday while gradually
strengthening to 30.6 inches.

LOZ062-180300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 PM EDT Thu Sep 17 2026

.TONIGHT...Northwest winds 5 to 15 knots becoming north. Waves
1 to 2 feet.
.FRIDAY...North winds 5 to 15 knots diminishing to less than
10 knots. Waves 2 feet or less.
.FRIDAY NIGHT...North winds 5 to 15 knots becoming east 15 to
20 knots. Waves 2 feet or less building to 2 to 4 feet.
.SATURDAY...East winds 10 to 15 knots. Waves 2 to 4 feet
subsiding to 1 to 3 feet.
.SATURDAY NIGHT...East winds 10 to 15 knots. A chance of showers
overnight. Waves 1 to 3 feet.
.SUNDAY...Northeast winds 10 to 15 knots increasing to 15 to
25 knots. A chance of showers during the day. Waves 1 to 3 feet
building to 3 to 6 feet.
.MONDAY...Northeast winds 15 to 25 knots. Waves 5 to 8 feet.
Waves occasionally around 10 feet.
.TUESDAY...Northeast winds to 30 knots becoming east. A chance of
showers. Waves 5 to 9 feet. Waves occasionally around 11 feet.

$$

LOZ063>065-180300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 PM EDT Thu Sep 17 2026

.TONIGHT...Northwest winds 5 to 15 knots becoming north. Waves
2 feet or less.
.FRIDAY...North winds 10 to 15 knots. Waves 1 to 3 feet.
.FRIDAY NIGHT...North winds 10 to 15 knots becoming northeast.
Waves 1 to 3 feet.
.SATURDAY...East winds 5 to 15 knots. Waves 1 to 3 feet.
.SATURDAY NIGHT...East winds 5 to 10 knots. A chance of showers
overnight. Waves 2 feet or less.
.SUNDAY...East winds 10 to 15 knots becoming northeast and
increasing to 15 to 25 knots. A chance of showers during the day.
Waves 1 to 3 feet building to 3 to 6 feet.
.MONDAY...Northeast winds 15 to 25 knots. Waves 4 to 7 feet.
Waves occasionally around 9 feet.
.TUESDAY...Northeast winds 15 to 25 knots becoming east. A chance
of showers. Waves 4 to 7 feet subsiding to 3 to 6 feet. Waves
occasionally around 9 feet.

$$

LOZ061-180300-
MAFOR 1721/
ONTARIO WEST 1/2 12700 11710 11810 11800 11810 11110 11800. Waves
2 feet or less.

ONTARIO EAST 1/2 13700 14810 11810. Waves 2 feet or less tonight.
Waves 1 to 3 feet Friday.

$$