519
FZUS61 KBUF 260203
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 PM EDT Sat Jul 25 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 30.2 inch surface high off the New England coast will
slowly weaken as it drifts to the Gulf of Saint Lawrence Sunday. A
29.5 inch low will develop over the western Great Lakes Sunday night
into Monday, before strengthening to 29.3 inches while moving
southeast into the lower Great Lakes Monday night and Tuesday. A
cold front associated with this low will swing across the lake late
Tuesday and Tuesday night. The low will then weaken to 29.6 inches
while drifting east into New England by Wednesday.

LOZ062-260900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1003 PM EDT Sat Jul 25 2026

.OVERNIGHT...South winds 10 knots or less becoming
southwest. Waves 1 foot or less.
.SUNDAY...Southwest winds 10 knots or less becoming south. Waves
1 foot or less.
.SUNDAY NIGHT...South winds 10 knots or less becoming southwest.
A chance of showers. Waves 1 foot or less.
.MONDAY...West winds less than 10 knots becoming east. A chance
of showers and thunderstorms in the afternoon. Waves 1 foot or
less.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. A chance of
showers and thunderstorms in the evening, then showers with a
chance of thunderstorms overnight. Waves 1 foot or less.
.TUESDAY...Southeast winds 5 to 10 knots becoming north and
increasing to 15 to 20 knots. Showers with a chance of
thunderstorms. Waves 1 foot or less building to 3 to 5 feet.
.WEDNESDAY...North winds 15 to 20 knots diminishing to 10 to
15 knots. A chance of showers. Waves 3 to 5 feet subsiding to
1 to 3 feet.
.THURSDAY...North winds 5 to 15 knots becoming northwest. Waves
2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-260900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1003 PM EDT Sat Jul 25 2026

.OVERNIGHT...South winds 10 knots or less becoming
southwest. Waves 1 foot or less.
.SUNDAY...Southwest winds 10 knots or less. Waves 1 foot or less.
.SUNDAY NIGHT...South winds 10 knots or less becoming southwest.
A chance of showers. Waves 1 foot or less.
.MONDAY...Southwest winds 10 knots or less becoming east. A
chance of showers in the afternoon. Waves 1 foot or less.
.MONDAY NIGHT...Southeast winds 10 knots or less. A chance of
showers in the evening, then showers likely with a chance of
thunderstorms overnight. Waves 1 foot or less.
.TUESDAY...Southeast winds 5 to 15 knots becoming northeast 15 to
20 knots. Showers with a chance of thunderstorms. Waves 2 feet or
less building to 2 to 4 feet.
.WEDNESDAY...Northeast winds 15 to 20 knots becoming north 10 to
15 knots. A chance of showers and thunderstorms. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.THURSDAY...North winds 5 to 15 knots becoming northwest. Waves
2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-260900-
MAFOR 2603/
ONTARIO WEST 1/2 14500 11600 11500 12400. A chance of showers
Sunday evening. Waves 1 foot or less.

ONTARIO EAST 1/2 11400 11500 11400 12500 11600 12400. Waves 1
foot or less.

$$