435
FZUS61 KBUF 110803
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Mon Aug 11 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 30.2 inch high will slowly drift southeast along the
Atlantic coast through the start of the new work week while
extending back to the eastern Great Lakes. Meanwhile, an area of low
pressure will move east across Ontario Canada Tuesday while
deepening to 29.4 inches by Wednesday. A trailing weak cold front
will cross the lake Wednesday.

LOZ062-111500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Mon Aug 11 2025

.TODAY...South winds 10 knots or less becoming east. Waves 1 foot
or less.
.TONIGHT...Southeast winds 5 to 10 knots becoming southwest.
Waves 1 foot or less.
.TUESDAY...Southwest winds 5 to 10 knots. A chance of showers and
thunderstorms in the afternoon. Waves 1 foot or less.
.TUESDAY NIGHT...Southwest winds 5 to 10 knots. A chance of
showers and thunderstorms in the evening, then showers likely
with a chance of thunderstorms overnight. Waves 2 feet or less.
.WEDNESDAY...Southwest winds 5 to 10 knots becoming northwest.
Showers likely with a chance of thunderstorms during the day,
then a chance of showers Wednesday night. Waves 1 to 2 feet.
.THURSDAY...North winds 5 to 10 knots becoming northeast. Waves
1 foot or less.
.FRIDAY...East winds 5 to 10 knots becoming south. Waves 1 foot
or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-111500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Mon Aug 11 2025

.TODAY...South winds 5 to 15 knots becoming east less than
10 knots. Waves 1 to 3 feet.
.TONIGHT...East winds 5 to 10 knots becoming south. Waves 2 feet
or less.
.TUESDAY...South winds 5 to 10 knots. Waves 2 feet or less.
.TUESDAY NIGHT...South winds 10 knots or less becoming southwest.
Showers likely with a chance of thunderstorms overnight. Waves
2 feet or less.
.WEDNESDAY...Southwest winds 5 to 10 knots becoming northwest.
Showers likely with a chance of thunderstorms during the day,
then a chance of showers Wednesday night. Waves 1 to 2 feet.
.THURSDAY...North winds 5 to 10 knots becoming northeast. Waves
2 feet or less.
.FRIDAY...East winds 10 knots or less becoming south. Waves
1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-111500-
MAFOR 1109/
ONTARIO WEST 1/2 12400 11300 12200 11300 11400 11500. Waves 1
foot or less.

ONTARIO EAST 1/2 12410 11300 12200 11300 12400. Waves 1 to 3 feet
today. Waves 2 feet or less tonight.

$$