213
FZUS61 KBUF 130202
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 PM EDT Sat Jul 12 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 29.7 inch low north of Lake Huron will make its way to
James Bay overnight while deepening to 29.3 inches. The low will
then lift north across Hudson Bay and into northern Quebec Sunday...
while slowly dragging its trailing cold front across the lake late
Sunday and Sunday night. A 30.1 inch high will slowly drift from the
Upper Midwest to New England Monday through Wednesday...then a 29.7
inch low will track northeastward across the Great Lakes and into
Quebec Wednesday night and Thursday.

LOZ062-130900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 PM EDT Sat Jul 12 2025

.OVERNIGHT...South winds around 10 knots becoming
southwest. A chance of showers and thunderstorms late. Waves 1 to
2 feet.
.SUNDAY...Southwest winds 5 to 10 knots becoming west. A chance
of showers and thunderstorms. Waves 1 to 2 feet.
.SUNDAY NIGHT...West winds 5 to 10 knots. A chance of showers and
thunderstorms in the evening. Waves 1 foot or less.
.MONDAY...West winds 10 knots or less becoming southwest. Waves
1 foot or less.
.MONDAY NIGHT...Southwest winds 5 to 10 knots. Waves 2 feet or
less.
.TUESDAY...Southwest winds 10 knots or less. Waves 1 foot or
less.
.WEDNESDAY...Southwest winds 10 knots or less becoming south. A
chance of showers Wednesday night. Waves 1 foot or less.
.THURSDAY...Southwest winds 10 to 15 knots. A chance of showers.
Waves 1 to 2 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-130900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 PM EDT Sat Jul 12 2025

.OVERNIGHT...Southeast winds 5 to 15 knots becoming south.
A chance of showers and thunderstorms late. Waves 1 to 3 feet.
.SUNDAY...South winds 5 to 15 knots becoming southwest. A chance
of showers and thunderstorms in the morning, then showers with a
chance of thunderstorms in the afternoon. Waves 1 to 3 feet
subsiding to 1 foot or less.
.SUNDAY NIGHT...South winds 5 to 10 knots becoming west. A chance
of showers and thunderstorms in the evening, then a chance of
showers overnight. Waves 1 foot or less.
.MONDAY...West winds 10 knots or less becoming southwest. Waves
1 foot or less.
.MONDAY NIGHT...Southwest winds 5 to 10 knots. Waves 1 foot or
less.
.TUESDAY...Southwest winds 10 knots or less becoming south. Waves
1 foot or less.
.WEDNESDAY...South winds 5 to 10 knots. A chance of showers
Wednesday night. Waves 2 feet or less.
.THURSDAY...Southwest winds 5 to 10 knots becoming west. Showers
likely with a chance of thunderstorms. Waves 1 to 2 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-130900-
MAFOR 1303/
ONTARIO WEST 1/2 12400 12500 12600 11500 11600. A chance of
showers and thunderstorms. Waves 1 to 2 feet.

ONTARIO EAST 1/2 11310 13410 11500 11606 12400. A chance of
thunderstorms Sunday and Sunday evening. Waves 1 to 3 feet
subsiding to 1 foot or less overnight and Sunday. Waves 1 foot or
less Sunday evening.

$$