614
FZUS61 KBUF 100203
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1003 PM EDT Sun Aug 9 2026

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 high pressure ridge averaging 30.3 inches begins to
exit tonight. On the backside of the ridge, a warm front sweeps
northeastward across Lake Ontario tonight into Monday morning. A
cold front then sweeps eastward across the lake Monday evening.
Behind the cold front, a trough averaging 29.8 inches should linger
over the eastern Great Lakes through Thursday. By this Friday, a
high pressure ridge averaging 30.0 inches should build from the
Upper Great Lakes.

LOZ062-100900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1003 PM EDT Sun Aug 9 2026

.OVERNIGHT...South winds 5 to 10 knots becoming southwest.
Showers likely with a chance of thunderstorms late. Waves 1 foot
or less.
.MONDAY...Southwest winds 10 to 15 knots becoming west. Showers
with a chance of thunderstorms early, then a chance of showers
and thunderstorms from late morning on. Waves 2 feet or less.
.MONDAY NIGHT...West winds 10 to 15 knots. Waves 1 to 2 feet.
.TUESDAY...West winds 5 to 10 knots becoming southwest. Waves
1 foot or less.
.TUESDAY NIGHT...West winds 10 knots or less becoming northwest.
Waves 1 foot or less.
.WEDNESDAY...Northeast winds 10 knots or less becoming northwest.
A chance of showers and thunderstorms. Waves 1 foot or less.
.THURSDAY...Northwest winds 5 to 15 knots. Waves 1 to 2 feet.
.FRIDAY...Northwest winds 5 to 10 knots becoming north. Waves
1 to 2 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-100900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1003 PM EDT Sun Aug 9 2026

.OVERNIGHT...South winds 5 to 15 knots. Waves 1 foot or
less.
.MONDAY...South winds 10 to 15 knots becoming west. Showers
likely with a chance of thunderstorms in the morning, then a
chance of showers and thunderstorms in the afternoon. Waves 1 to
2 feet.
.MONDAY NIGHT...West winds 10 to 15 knots becoming northwest. A
chance of showers in the evening. Waves 1 to 2 feet.
.TUESDAY...Northwest winds 5 to 15 knots becoming west. Waves
1 to 2 feet.
.TUESDAY NIGHT...West winds 5 to 10 knots. Waves 2 feet or less.
.WEDNESDAY...West winds 10 knots or less. A chance of showers
during the day, then showers likely with a chance of
thunderstorms Wednesday night. Waves 1 foot or less.
.THURSDAY...Northwest winds 10 to 15 knots. A chance of showers
during the day. Waves 1 to 3 feet.
.FRIDAY...Northwest winds 5 to 10 knots becoming north. Waves
1 to 3 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-100900-
MAFOR 1003/
ONTARIO WEST 1/2 11400 11410 11516 11510 14610. A chance of
thunderstorms Monday morning. Waves 2 feet or less.

ONTARIO EAST 1/2 11400 12410 11516 11510 13610. Waves 2 feet or
less.

$$