FZUS61 KBUF 130802
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Wed May 13 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 29.6 inch low over the central Great Lakes this
morning will move slowly east, just to the north of Lake Ontario by
this evening, then will weaken into a trough as it slowly drifts
over eastern New York and New England Thursday. A 30.0 inch high
will then build from the central Great Lakes and Ohio Valley
Thursday night to the lower Great Lakes and Mid Atlantic Friday,
then off the Carolina coast Saturday. A 29.3 inch low over the
central Plains will then push its' warm front into the lower Great
Lakes region Sunday and Sunday night.

LOZ062-131500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Wed May 13 2026

.TODAY...South winds 15 to 20 knots becoming southwest. Showers
this morning, then a chance of showers early this afternoon.
Waves 2 to 4 feet.
.TONIGHT...West winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 2 to 4 feet.
.THURSDAY...West winds 5 to 10 knots becoming northwest. A chance
of showers. Waves 2 feet or less.
.THURSDAY NIGHT...Northwest winds 5 to 10 knots. A chance of
showers in the evening. Waves 1 foot or less.
.FRIDAY...West winds 5 to 15 knots becoming southwest. Waves
2 feet or less.
.SATURDAY...Southwest winds 15 to 20 knots becoming west and
diminishing to 5 to 10 knots. Waves 1 to 3 feet building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.SUNDAY...Northwest winds 10 knots or less becoming east. A
chance of showers. Waves 2 feet or less.

$$

LOZ063>065-131500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Wed May 13 2026

.TODAY...Southeast winds 15 to 25 knots becoming southwest.
Showers this morning, then showers likely with a chance of
thunderstorms early this afternoon. A chance of showers and
thunderstorms late. Waves 3 to 5 feet subsiding to 2 to 4 feet.
.TONIGHT...Southwest winds 5 to 15 knots. Waves 2 to 4 feet
subsiding to 1 to 3 feet.
.THURSDAY...Southwest winds 10 knots or less becoming northwest.
A chance of showers in the afternoon. Waves 2 feet or less.
.THURSDAY NIGHT...West winds 5 to 10 knots becoming northwest. A
chance of showers. Waves 2 feet or less.
.FRIDAY...Northwest winds 5 to 15 knots becoming south. A chance
of showers during the day. Waves 2 feet or less.
.SATURDAY...South winds 10 to 15 knots becoming west. A chance of
showers. Waves 1 to 3 feet.
.SUNDAY...West winds 5 to 10 knots becoming east. A chance of
showers. Waves 2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-131500-
MAFOR 1309/
ONTARIO WEST 1/2 11326 11426 12520 11620 11610 12510. Waves 2 to
4 feet.

ONTARIO EAST 1/2 11326 11336 11430 11420 13510 11500. Waves 1 to
3 feet building to 3 to 5 feet, then subsiding to 2 to 4 feet
today. Waves 1 to 3 feet tonight.

$$