369
FZUS61 KBUF 312002
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 PM EDT Mon Aug 31 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 frontal boundary will remain stalled near the lake
today through Tuesday before moving northeast across the lake
Tuesday night as a warm front. A 29.8 inch low will then move from
northwest Ontario province Tuesday night to western Quebec by
Wednesday night before reaching northern New England and the
Canadian Maritimes Thursday night. A trailing cold front will move
south across the lake Thursday.

LOZ062-010300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 PM EDT Mon Aug 31 2026

.TONIGHT...Southeast winds less than 10 knots becoming south.
Showers with a chance of thunderstorms through the early
overnight, then a chance of showers and thunderstorms late. Waves
1 foot or less.
.TUESDAY...South winds 10 knots or less becoming east. A chance
of showers early. Waves 1 foot or less.
.TUESDAY NIGHT...Southeast winds 10 knots or less. Showers likely
overnight. Waves 1 foot or less.
.WEDNESDAY...South winds 5 to 10 knots. A chance of showers in
the morning, then showers likely with a chance of thunderstorms
in the afternoon. Waves 1 foot or less.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots becoming
southwest. Showers with a chance of thunderstorms. Waves 1 foot
or less.
.THURSDAY...West winds 5 to 10 knots becoming northwest. Showers
likely during the day, then a chance of showers Thursday night.
Waves 1 foot or less.
.FRIDAY...Northwest winds 10 knots or less becoming north. Waves
1 foot or less.
.SATURDAY...North winds 5 to 10 knots becoming northeast. Waves
2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-010300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 PM EDT Mon Aug 31 2026

.TONIGHT...South winds 10 knots or less. Showers with a chance of
thunderstorms. Waves 1 foot or less.
.TUESDAY...South winds 10 knots or less becoming north. Showers
likely with a chance of thunderstorms early. Waves 1 foot or
less.
.TUESDAY NIGHT...Northeast winds 10 knots or less becoming
southeast. Waves 1 foot or less.
.WEDNESDAY...Southeast winds 5 to 15 knots. A chance of showers
in the morning, then showers likely with a chance of
thunderstorms in the afternoon. Waves 2 feet or less.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots becoming
southwest. Showers with a chance of thunderstorms. Waves 2 feet
or less.
.THURSDAY...West winds 5 to 10 knots becoming northwest. Showers
with a chance of thunderstorms during the day. Waves 1 to 2 feet.
.FRIDAY...Northwest winds 5 to 15 knots becoming north. Waves
2 feet or less.
.SATURDAY...North winds 10 to 15 knots becoming northeast. Waves
2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-010300-
MAFOR 3121/
ONTARIO WEST 1/2 11300 12406 12400 11500 12600. A chance of
thunderstorms tonight. Waves 1 foot or less.

ONTARIO EAST 1/2 11306 11400 13406 11400 11600 11700. A chance of
thunderstorms overnight and Tuesday morning. Waves 1 foot or
less.

$$