685
FZUS61 KBUF 032239
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
639 PM EDT Thu Jul 3 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...An expansive 30.1 inch area of high pressure will build
eastward across the Great Lakes tonight and Friday...before drifting
to the eastern seaboard Saturday. A wavy cold frontal boundary is
then forecast to slowly push southeastward across the Upper Great
Lakes and southern Ontario during Sunday, then across the Lower
Great Lakes on Monday. A 30.1 inch surface high will build across
the lower Great Lakes on Tuesday.

LOZ062-040315-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
639 PM EDT Thu Jul 3 2025

.TONIGHT...Northwest winds 15 to 20 knots becoming north 5 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 2 feet.
.FRIDAY...North winds 10 knots or less becoming southwest. Waves
1 foot or less.
.FRIDAY NIGHT...South winds 5 to 10 knots. Waves 1 foot or less.
.SATURDAY...South winds 5 to 15 knots. Waves 2 feet or less.
.SATURDAY NIGHT...South winds 10 to 15 knots becoming southwest.
Waves 1 to 2 feet.
.SUNDAY...Southwest winds 10 to 15 knots. Waves 1 to 3 feet.
.MONDAY...Southwest winds around 10 knots becoming north. A
chance of showers and thunderstorms. Waves 1 to 2 feet.
.TUESDAY...Northeast winds 5 to 10 knots becoming north. Waves
2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-040315-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
639 PM EDT Thu Jul 3 2025

.TONIGHT...West winds 15 to 20 knots becoming north 5 to
15 knots. A chance of showers early. Waves 2 to 4 feet subsiding
to 1 to 2 feet.
.FRIDAY...North winds 5 to 10 knots becoming southwest. Waves
1 foot or less.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots becoming south.
Waves 1 foot or less.
.SATURDAY...South winds 5 to 10 knots. Waves 1 foot or less.
.SATURDAY NIGHT...South winds 5 to 15 knots. Waves 2 feet or
less.
.SUNDAY...Southwest winds 5 to 15 knots becoming south. Waves
1 to 2 feet.
.MONDAY...Southwest winds 5 to 10 knots becoming north. A chance
of showers and thunderstorms. Waves 1 to 2 feet.
.TUESDAY...North winds 5 to 10 knots. A chance of showers during
the day. Waves 2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-040315-
MAFOR 0321/
ONTARIO WEST 1/2 13710 13800 11600 11500. Waves 1 to 3 feet
tonight. Waves 1 foot or less Friday.

ONTARIO EAST 1/2 11610 12710 13800 11600 11500. Waves 1 to 3 feet
tonight. Waves 1 foot or less Friday.

$$