960
FZUS61 KBUF 162001
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
401 PM EDT Fri May 16 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 29.0 inch low over the upper Midwest will weaken to
29.3 inches as it moves east over the upper Great Lakes by Saturday
morning, before entering into central Quebec Sunday. The lake will
then be on the southern periphery of a large 30.6 inch ridge
centered over the Hudson Bay on Monday.

LOZ062-170300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
401 PM EDT Fri May 16 2025

.TONIGHT...Southwest winds 5 to 10 knots becoming southeast. A
chance of showers after midnight. Showers likely with a chance of
thunderstorms late. Waves 1 foot or less.
.SATURDAY...South winds 10 to 15 knots becoming southwest 15 to
20 knots. Showers likely with a chance of thunderstorms. Waves
1 to 3 feet building to 3 to 5 feet.
.SATURDAY NIGHT...Southwest winds 15 to 20 knots becoming west. A
chance of showers. Waves 3 to 6 feet.
.SUNDAY...West winds 15 to 20 knots. Waves 4 to 6 feet.
.SUNDAY NIGHT...Northwest winds 15 to 20 knots diminishing to
10 to 15 knots. Waves 3 to 6 feet subsiding to 2 to 4 feet.
.MONDAY...Northwest winds 10 to 15 knots becoming north. Waves
1 to 3 feet.
.TUESDAY...North winds 5 to 15 knots becoming northeast. Waves
1 to 3 feet.
.WEDNESDAY...Northeast winds 15 to 20 knots. A chance of showers.
Waves 2 to 4 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-170300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
401 PM EDT Fri May 16 2025

.TONIGHT...Southwest winds 5 to 10 knots becoming southeast. A
chance of showers late. Waves 1 foot or less.
.SATURDAY...South winds 5 to 10 knots becoming southwest and
increasing to 15 to 20 knots. Showers likely with a chance of
thunderstorms in the morning, then showers with thunderstorms
likely in the afternoon. Waves 2 feet or less building to 2 to
4 feet.
.SATURDAY NIGHT...Southwest winds 15 to 20 knots. A chance of
showers in the evening, then showers likely overnight. Waves 3 to
6 feet.
.SUNDAY...West winds 15 to 25 knots. Showers likely in the
morning, then a chance of showers in the afternoon. Waves 3 to
6 feet building to 5 to 8 feet. Waves occasionally around
10 feet.
.SUNDAY NIGHT...West winds 15 to 20 knots becoming northwest. A
chance of showers in the evening. Waves 5 to 8 feet subsiding to
3 to 5 feet. Waves occasionally around 10 feet.
.MONDAY...Northwest winds 15 to 20 knots becoming north 10 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.TUESDAY...North winds 5 to 15 knots becoming northeast. Waves
2 feet or less.
.WEDNESDAY...Northeast winds 10 to 15 knots becoming east. A
chance of showers. Waves 1 to 3 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-170300-
MAFOR 1621/
ONTARIO WEST 1/2 12500 11400 11300 11306 11410 11510 11520. Waves
1 foot or less tonight. Waves 1 to 3 feet building to 2 to 4 feet
Saturday.

ONTARIO EAST 1/2 11500 13400 11300 11400 11510 11516. A chance of
thunderstorms Saturday afternoon. Waves 1 foot or less tonight.
Waves 1 to 3 feet Saturday.

$$