997
FZUS61 KBUF 220202
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 PM EDT Sat Jun 21 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 over the Mid-Atlantic and extending northward
across the Lake will retreat back south by the early overnight,
allowing a complex of thunderstorms to possibly dive southeastward
near or across the Lake later tonight into the first part of Sunday.
The 30.2 inch surface high still anchored over the east coast will
build back north for later Sunday through Tuesday. A frontal
boundary will then sag southward Tuesday night, and stall over or
near the Lake for Wednesday through Thursday, with a couple of weak
areas of low pressure averaging 30.0 inches rippling east along the
boundary during this time.

LOZ062-220900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 PM EDT Sat Jun 21 2025

.OVERNIGHT...Southwest winds 15 to 25 knots. Waves 2 to
4 feet building to 4 to 7 feet. Waves occasionally around 9 feet.
.SUNDAY...Southwest winds 15 to 25 knots. Waves 4 to 7 feet
subsiding to 3 to 6 feet. Waves occasionally around 9 feet.
.SUNDAY NIGHT...Southwest winds 15 to 20 knots diminishing to
10 to 15 knots. Waves 2 to 4 feet.
.MONDAY...Southwest winds 10 to 15 knots increasing to 15 to
20 knots. Waves 2 to 4 feet.
.MONDAY NIGHT...Southwest winds 15 to 20 knots diminishing to
10 to 15 knots. Waves 3 to 5 feet subsiding to 2 to 4 feet.
.TUESDAY...Southwest winds 5 to 15 knots becoming northwest.
Waves 1 to 3 feet.
.WEDNESDAY...Northeast winds 5 to 10 knots becoming east. A
chance of showers and thunderstorms. Waves 1 to 2 feet.
.THURSDAY...East winds 10 to 15 knots. A chance of showers. Waves
1 to 2 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-220900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 PM EDT Sat Jun 21 2025

.OVERNIGHT...South winds 15 to 25 knots becoming southwest.
A chance of showers late. Waves 1 to 3 feet building to 3 to
6 feet.
.SUNDAY...Southwest winds 15 to 25 knots diminishing to 10 to
15 knots. A chance of showers early. Waves 4 to 7 feet subsiding
to 3 to 6 feet. Waves occasionally around 9 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots. Waves 2 to 4 feet
subsiding to 1 to 3 feet.
.MONDAY...Southwest winds 10 to 15 knots. Waves 1 to 3 feet.
.MONDAY NIGHT...Southwest winds 10 to 15 knots. Waves 1 to
3 feet.
.TUESDAY...West winds 5 to 15 knots becoming northwest. Waves
1 to 3 feet.
.WEDNESDAY...North winds 5 to 10 knots becoming northeast. A
chance of showers and thunderstorms. Waves 2 feet or less.
.THURSDAY...Northeast winds 10 to 15 knots becoming east. A
chance of showers. Waves 2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-220900-
MAFOR 2203/
ONTARIO WEST 1/2 13530 14520 11510. Waves 2 to 4 feet building to
4 to 7 feet, and occasionally around 9 feet overnight. Waves 4 to
7 feet subsiding to 3 to 6 feet, and occasionally around 9 feet
Sunday. Waves 2 to 4 feet Sunday evening.

ONTARIO EAST 1/2 11420 11520 11530 12620 11610 12510. Waves 1 to
3 feet building to 3 to 6 feet overnight. Waves 4 to 7 feet
subsiding to 3 to 6 feet, and occasionally around 9 feet Sunday.
Waves 2 to 4 feet subsiding to 1 to 3 feet Sunday evening.

$$