596
FZUS61 KBUF 042002
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 PM EDT Fri Jul 4 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 high will build eastward across
the Lower Great Lakes today...before drifting to the eastern
seaboard Saturday. A wavy cold frontal boundary will then slowly
push southeastward across the Upper Great Lakes and southern Ontario
Sunday, then across the Lower Great Lakes on Monday. Following the
frontal passage...a 30.1 inch surface high will build across the
Lower Great Lakes on Tuesday into Wednesday.

LOZ062-050300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 PM EDT Fri Jul 4 2025

.TONIGHT...Southeast winds 10 knots or less becoming south. Waves
1 foot or less.
.SATURDAY...South winds 10 knots or less becoming southeast.
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 increasing to 15 to
20 knots. Waves 1 to 3 feet building to 2 to 4 feet.
.SUNDAY NIGHT...Southwest winds 15 to 20 knots becoming west
10 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.MONDAY...West winds 5 to 15 knots becoming northwest. Waves 1 to
2 feet.
.TUESDAY...Northwest winds 5 to 10 knots. Waves 1 foot or less.
.WEDNESDAY...Northeast winds 5 to 10 knots becoming east. Waves
1 foot or less.

$$

LOZ063>065-050300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 PM EDT Fri Jul 4 2025

.TONIGHT...Southwest winds 5 to 10 knots becoming south. Waves
1 foot or less.
.SATURDAY...South winds 5 to 10 knots becoming southeast. Waves
1 foot or less.
.SATURDAY NIGHT...South winds 5 to 10 knots. Waves 2 feet or
less.
.SUNDAY...South winds 5 to 10 knots becoming southwest. Waves
1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots. Waves 1 to 3 feet.
.MONDAY...Southwest winds 5 to 15 knots becoming northwest. A
chance of showers and thunderstorms. Waves 1 to 3 feet.
.TUESDAY...Northwest winds 10 knots or less becoming west. Waves
1 foot or less.
.WEDNESDAY...North winds 5 to 10 knots becoming northeast. Waves
1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-050300-
MAFOR 0421/
ONTARIO WEST 1/2 11300 14400 11400 12300. Waves 1 foot or less.

ONTARIO EAST 1/2 11500 14400 11400 12300. Waves 1 foot or less.

$$