FZUS61 KBUF 200210
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1009 PM EDT Sun Apr 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...Behind a passing cold front, a 30.4 inch high will
settle southeast across the Great Lakes through Monday night, before
sliding off the mid-Atlantic coast Tuesday. A 29.4 inch low over
lower Hudson Bay Tuesday, will weaken to 29.9 inches by Wednesday,
while pushing an attendant weak cold front across the lake Tuesday
night. A 30.2 inch high will then build across the Great Lakes
region Wednesday and Thursday. A warm front will then approach the
lake by Friday.

LOZ062-200900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1009 PM EDT Sun Apr 19 2026

.REST OF TONIGHT...Northwest winds 15 to 20 knots. A chance of
snow and rain showers late this evening. A chance of snow showers
late. Waves 2 to 4 feet.
.MONDAY...Northwest winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.MONDAY NIGHT...Northwest winds 5 to 15 knots becoming south
10 knots or less. Waves 1 to 3 feet subsiding to 1 foot or less.
.TUESDAY...South winds 10 to 15 knots becoming southeast. Waves
1 to 3 feet.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots becoming
northeast. Waves 2 feet or less.
.WEDNESDAY...Northeast winds 10 knots or less becoming northwest.
Waves 1 foot or less.
.THURSDAY...East winds 10 knots or less. Waves 1 foot or less.
.FRIDAY...East winds 10 to 15 knots increasing to 15 to 20 knots.
A chance of showers. Waves 1 to 3 feet.

$$

LOZ063>065-200900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1009 PM EDT Sun Apr 19 2026

.REST OF TONIGHT...West winds 15 to 20 knots becoming northwest.
A chance of rain showers late this evening. A chance of snow
showers late. Waves 2 to 4 feet building to 3 to 5 feet.
.MONDAY...Northwest winds 15 to 20 knots becoming west. Waves
3 to 5 feet subsiding to 2 to 4 feet.
.MONDAY NIGHT...West winds 15 to 20 knots becoming southwest and
diminishing to 5 to 10 knots. Waves 2 to 4 feet subsiding to
2 feet or less.
.TUESDAY...Southwest winds 5 to 15 knots becoming southeast.
Waves 1 to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Waves 2 feet or
less.
.WEDNESDAY...Northeast winds 10 knots or less becoming northwest.
Waves 1 foot or less.
.THURSDAY...Northwest winds 10 knots or less becoming east. Waves
1 foot or less.
.FRIDAY...Northeast winds 5 to 15 knots becoming east. A chance
of showers Friday night. Waves 1 to 3 feet.

$$

LOZ061-200900-
MAFOR 2003/
ONTARIO WEST 1/2 13720 14710 11710. Waves 2 to 4 feet building to
3 to 5 feet overnight. Waves 3 to 5 feet subsiding to 1 to 3 feet
Monday. Waves 2 to 4 feet subsiding to 1 to 3 feet Monday
evening.

ONTARIO EAST 1/2 13720 12710 11610 12620. Waves 2 to 4 feet
building to 3 to 5 feet overnight. Waves 3 to 5 feet subsiding to
2 to 4 feet Monday. Waves 2 to 4 feet Monday evening.

$$