871
FZUS61 KBUF 050802
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Sat Jul 5 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 30.2 inch high will drift away from the
Mid-Atlantic coast today. 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.

LOZ062-051500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Sat Jul 5 2025

.TODAY...South winds 5 to 10 knots becoming southeast. Waves
1 foot or less.
.TONIGHT...South winds 10 to 15 knots becoming southwest. Waves
2 feet or less.
.SUNDAY...Southwest winds 10 to 15 knots increasing to 15 to
20 knots. Waves 1 to 3 feet building to 3 to 5 feet.
.SUNDAY NIGHT...Southwest winds 15 to 20 knots becoming west
10 to 15 knots. A chance of showers and thunderstorms. Waves 3 to
5 feet subsiding to 1 to 3 feet.
.MONDAY...West winds 5 to 10 knots becoming northwest. A chance
of showers and thunderstorms during the day, then a chance of
showers Monday night. Waves 2 feet or less.
.TUESDAY...North winds 5 to 10 knots becoming northwest. Waves
1 foot or less.
.WEDNESDAY...Northwest winds 10 knots or less becoming east.
Waves 1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-051500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Sat Jul 5 2025

.TODAY...South winds 5 to 10 knots becoming southeast. Waves
1 foot or less.
.TONIGHT...Southeast winds 5 to 10 knots becoming south. Waves
2 feet or less.
.SUNDAY...Southwest winds 10 to 15 knots. Waves 1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 5 to 10 knots. A chance of
showers. Waves 1 to 3 feet.
.MONDAY...Southwest winds 5 to 10 knots becoming north. A chance
of showers and thunderstorms during the day, then a chance of
showers Monday night. Waves 2 feet or less.
.TUESDAY...North winds 10 knots or less becoming northwest. Waves
1 foot or less.
.WEDNESDAY...Northwest winds less than 10 knots becoming south.
Waves 1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-051500-
MAFOR 0509/
ONTARIO WEST 1/2 12400 12300 11400 11410 12510. Waves 2 feet or
less.

ONTARIO EAST 1/2 12400 13300 13400. Waves 2 feet or less.

$$