FZUS61 KBUF 250802
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Sat Apr 25 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 29.7 inch low will pass through the Lower lakes today
then slide southeast into the mid Atlantic region. A 30.3 inch area
of high pressure will build in across the lower Great Lakes tonight
through Monday. A 29.4 inch area of low pressure over the Great
Plains Monday night, will advance northeast into the upper Great
Lakes later Monday night into Tuesday morning while pushing an
attendant warm front across the Lake before heading northeast to
James Bay Tuesday night sending an attendant cold front across the
Lake.

LOZ062-251500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Sat Apr 25 2026

.TODAY...East winds to 30 knots becoming northeast. Showers.
Waves 5 to 8 feet building to 7 to 11 feet. Waves occasionally
around 14 feet.
.TONIGHT...Northeast winds 15 to 25 knots diminishing to 10 to
15 knots. A chance of showers early. Waves 6 to 9 feet subsiding
to 1 to 3 feet. Waves occasionally around 11 feet.
.SUNDAY...Northeast winds 5 to 10 knots becoming east. Waves 1 to
3 feet.
.SUNDAY NIGHT...East winds 10 knots or less. Waves 1 foot or
less.
.MONDAY...East winds 5 to 15 knots becoming southeast. Waves
2 feet or less.
.TUESDAY...Southeast winds 5 to 15 knots becoming southwest.
Showers likely. Waves 1 to 3 feet.
.WEDNESDAY...West winds 5 to 10 knots becoming northwest. A
chance of showers. Waves 2 feet or less.

$$

LOZ063>065-251500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Sat Apr 25 2026

.TODAY...East winds 15 to 25 knots becoming northeast. Showers.
Waves 3 to 6 feet building to 5 to 8 feet. Waves occasionally
around 10 feet.
.TONIGHT...East winds 15 to 20 knots diminishing to 5 to
15 knots. Showers likely early, then a chance of showers late in
the evening. Waves 3 to 6 feet subsiding to 1 to 3 feet.
.SUNDAY...Northeast winds 10 knots or less becoming northwest.
Waves 1 foot or less.
.SUNDAY NIGHT...Northwest winds less than 10 knots becoming
north. Waves 1 foot or less.
.MONDAY...Northeast winds 10 knots or less becoming southeast
10 to 15 knots. Waves 2 feet or less.
.TUESDAY...Southeast winds 15 to 20 knots becoming south. Showers
likely. Waves 1 to 3 feet building to 2 to 4 feet.
.WEDNESDAY...South winds 15 to 20 knots becoming west 5 to
15 knots. Showers likely. Waves 1 to 3 feet.

$$

LOZ061-251500-
MAFOR 2509/
ONTARIO WEST 1/2 11236 12246 11146 11130 11220 12210. Waves 3 to
5 feet building to 7 to 11 feet, and occasionally around 14 feet
today. Waves 6 to 9 feet subsiding to 1 to 3 feet, and
occasionally around 11 feet tonight.

ONTARIO EAST 1/2 11220 13236 11226 11210 12200. Waves 3 to 6 feet
today. Waves 3 to 5 feet subsiding to 1 foot or less tonight.

$$