623
FZUS61 KBUF 150802
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Tue Jul 15 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 30.1 inch high will slowly drift from the central Great Lakes to
New England through Wednesday. A 29.7 inch low will track
northeastward across the Great Lakes and into Quebec Wednesday night
and Thursday...with its trailing cold front slowly pushing across
the lake early on Friday. A 30.2 inch high will then build into the
region later Friday through Saturday.

LOZ062-151500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Tue Jul 15 2025

.TODAY...Light and variable winds. Waves 1 foot or less.
.TONIGHT...Southeast winds 10 knots or less becoming southwest.
Waves 1 foot or less.
.WEDNESDAY...Southwest winds 10 knots or less becoming southeast.
A chance of showers and thunderstorms in the afternoon. Waves
1 foot or less.
.WEDNESDAY NIGHT...South winds 5 to 10 knots becoming southwest.
A chance of showers and thunderstorms in the evening. Waves
1 foot or less.
.THURSDAY...Southwest winds 5 to 15 knots becoming north. Showers
likely with a chance of thunderstorms. Waves 1 to 3 feet.
.FRIDAY...Northeast winds 5 to 15 knots becoming north 10 knots
or less. Waves 2 feet or less.
.SATURDAY...East winds 5 to 10 knots becoming southwest. A chance
of showers Saturday night. Waves 1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-151500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Tue Jul 15 2025

.TODAY...West winds less than 10 knots becoming north. Waves
1 foot or less.
.TONIGHT...Southeast winds 10 knots or less becoming south. Waves
1 foot or less.
.WEDNESDAY...South winds 10 knots or less. A chance of showers
and thunderstorms in the afternoon. Waves 1 foot or less.
.WEDNESDAY NIGHT...South winds 10 knots or less becoming
southwest. A chance of showers and thunderstorms. Waves 1 foot or
less.
.THURSDAY...Southwest winds 5 to 15 knots becoming northwest. A
chance of showers and thunderstorms. Waves 1 to 3 feet.
.FRIDAY...North winds 5 to 15 knots becoming west. Waves 1 to
3 feet subsiding to 1 foot or less.
.SATURDAY...Southwest winds 10 knots or less. A chance of showers
Saturday night. Waves 1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-151500-
MAFOR 1509/
ONTARIO WEST 1/2 11600 11500 11600 11800 11200 11300 12400. Waves
1 foot or less.

ONTARIO EAST 1/2 13600 11700 11200 11300 12400. Waves 1 foot or
less.

$$