921
FZUS61 KBUF 180852
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
452 AM EDT Mon Aug 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...A 30.3 inch high will push into central Quebec today,
while also ridging southward across the Lower Great Lakes. A 29.9
inch low will move into the Central Great Lakes tonight, then will
weaken and stall out across the Lower Lakes Tuesday and Tuesday
night. A leftover surface trough will remain near the lake
Wednesday, while Hurricane Erin moves northward well off the east
coast. A 30.1 inch high will then build across the Great Lakes
region Thursday through Friday.

LOZ062-181515-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
452 AM EDT Mon Aug 18 2025

.TODAY...Northeast winds 15 to 20 knots becoming east. Waves 3 to
6 feet.
.TONIGHT...East winds 15 to 20 knots becoming southeast 10 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 2 feet.
.TUESDAY...Southeast winds 5 to 10 knots becoming east. A chance
of showers in the afternoon. Waves 1 to 2 feet.
.TUESDAY NIGHT...East winds around 10 knots becoming south. A
chance of showers. Waves around 1 foot.
.WEDNESDAY...Southwest winds 5 to 15 knots becoming northeast. A
chance of showers. Waves 2 feet or less building to 2 to 3 feet.
.THURSDAY...Northeast winds 5 to 15 knots becoming east. Waves
1 to 3 feet.
.FRIDAY...East winds 5 to 10 knots becoming south. Waves around
1 foot.

$$

LOZ063>065-181515-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
452 AM EDT Mon Aug 18 2025

.TODAY...Northeast winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 3 to 6 feet subsiding to 2 to 4 feet.
.TONIGHT...Northeast winds 5 to 15 knots becoming southeast.
Waves 1 to 3 feet.
.TUESDAY...Southeast winds 5 to 10 knots. Waves 2 feet or less.
.TUESDAY NIGHT...Southeast winds 10 to 15 knots becoming south
15 to 20 knots. A chance of showers. Waves 1 to 3 feet.
.WEDNESDAY...South winds 5 to 15 knots becoming northeast. A
chance of showers. Waves 1 to 3 feet.
.THURSDAY...Northeast winds 5 to 15 knots. Waves 1 to 3 feet.
.FRIDAY...Northeast winds 5 to 10 knots becoming south. Waves
1 foot or less.

$$

LOZ061-181515-
MAFOR 1809/
ONTARIO WEST 1/2 12120 12220 13210 11200. Waves 3 to 6 feet
today. Waves 2 to 4 feet tonight.

ONTARIO EAST 1/2 12120 14110 11200 11300. Waves 3 to 6 feet
subsiding to 2 to 4 feet today. Waves 1 to 3 feet tonight.

$$