836
FZUS61 KBUF 151402
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 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 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 pushing across the lake early Friday. A
30.2 inch high will then build into the region later Friday through
Saturday.

LOZ062-152100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 AM EDT Tue Jul 15 2025

.THIS AFTERNOON...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>065-152100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 AM EDT Tue Jul 15 2025

.THIS AFTERNOON...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.

$$

LOZ061-152100-
MAFOR 1515/
ONTARIO WEST 1/2 11600 11800 11200 11300 12400 12500. Waves 1
foot or less.

ONTARIO EAST 1/2 11600 11700 11200 11300 14400. Waves 1 foot or
less.

$$