474
FZUS61 KBUF 111403
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1003 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 Tuesday while extending back to the eastern
Great Lakes. Meanwhile, a 29.4 inch low will move from northwest
Ontario province Tuesday to northern Quebec by late Wednesday while
deepening to 29.2 inches. A trailing cold front will cross the lake
Wednesday. A 30.1 inch high will then build from northwest Ontario
province Thursday to Quebec and New England Friday.

LOZ062-112100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1003 AM EDT Mon Aug 11 2025

.THIS AFTERNOON...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>065-112100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1003 AM EDT Mon Aug 11 2025

.THIS AFTERNOON...South winds 5 to 15 knots becoming northeast.
Waves 2 feet or less.
.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
1 foot 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.

$$

LOZ061-112100-
MAFOR 1115/
ONTARIO WEST 1/2 13200 11300 11400 13500. Waves 1 foot or less.

ONTARIO EAST 1/2 11410 12100 11300 14400. Waves 2 feet or less.

$$