FZUS61 KBUF 271402
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 AM EDT Mon Apr 27 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 30.3 inch high will weaken across the lower Great
Lakes region today. A 29.4 inch low over the Great Plains tonight
will advance northeast into the upper Great Lakes later tonight into
Tuesday morning, while pushing a warm front across the lake. The low
will head northeast to James Bay Tuesday night sending a cold front
across the lake. An inverted trough averaging 29.7 inch inverted
trough is expected across the lower Great Lakes Wednesday through
Wednesday night. The trough/low will track to the coast of New
England through Friday while also deepening to 29.5 inches.

LOZ062-272100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 AM EDT Mon Apr 27 2026

.THIS AFTERNOON...East winds 5 to 15 knots. Waves 1 to 3 feet.
.TONIGHT...East winds 15 to 20 knots becoming southeast 10 to
15 knots. Waves 2 to 4 feet.
.TUESDAY...Southeast winds 10 to 15 knots becoming south 15 to
20 knots. Showers. Waves 2 to 4 feet.
.TUESDAY NIGHT...Southwest winds 15 to 20 knots becoming
northwest and diminishing to less than 10 knots overnight. A
chance of showers in the evening. Waves 1 to 3 feet.
.WEDNESDAY...North winds 5 to 15 knots becoming northwest 15 to
20 knots. Showers. Waves 1 foot or less building to 2 to 4 feet.
.THURSDAY...Northwest winds 15 to 20 knots. A chance of rain
showers during the day. Waves 2 to 4 feet building to 3 to
5 feet.
.FRIDAY...Northwest winds 15 to 20 knots. Waves 3 to 6 feet.

$$

LOZ063>065-272100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 AM EDT Mon Apr 27 2026

.THIS AFTERNOON...Southeast winds 10 knots or less becoming
northeast. Waves 1 foot or less.
.TONIGHT...East winds 10 to 15 knots becoming southeast 15 to
20 knots. Waves 1 to 3 feet.
.TUESDAY...Southeast winds 15 to 20 knots becoming south.
Showers. Waves 2 to 4 feet building to 3 to 5 feet.
.TUESDAY NIGHT...South winds 15 to 20 knots becoming west 10 to
15 knots. Showers likely in the evening, then a chance of showers
overnight. Waves 3 to 5 feet subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots increasing to 15 to
20 knots. Showers. Waves 2 feet or less building to 2 to 4 feet.
.THURSDAY...Northwest winds 15 to 25 knots. Rain showers likely
during the day, then a chance of rain showers Thursday night.
Waves 3 to 5 feet building to 4 to 7 feet. Waves occasionally
around 9 feet.
.FRIDAY...Northwest winds to 30 knots diminishing to 15 to
25 knots. A chance of rain showers. Waves 6 to 9 feet subsiding
to 4 to 7 feet. Waves occasionally around 11 feet.

$$

LOZ061-272100-
MAFOR 2715/
ONTARIO WEST 1/2 11200 13210 12310 11320 11326. Waves 1 to 3 feet
this afternoon. Waves 2 to 4 feet tonight and Tuesday morning.

ONTARIO EAST 1/2 11200 12100 11210 12310 12320. A chance of
showers Tuesday morning. Waves 1 foot or less this afternoon.
Waves 1 to 3 feet tonight. Waves 2 to 4 feet Tuesday morning.

$$