890
FZUS61 KBUF 232002
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 PM EDT Thu Jul 23 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 29.3 inch low over northern Quebec this morning
will move northeast and across the North Atlantic by tonight.
Meanwhile, a 30.2 inch high will build across the Central Great
Lakes today, and then across the Lake tonight. This high will linger
from the lower Great Lakes to New England Friday through Saturday
before weakening and drifting off the east coast Sunday. A 29.5 inch
area of low pressure will develop over the western Great Lakes
Sunday night and move north of the Lake Monday.

LOZ062-240300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 PM EDT Thu Jul 23 2026

.TONIGHT...Southwest winds 5 to 10 knots. Waves 1 foot or less.
.FRIDAY...Southwest winds 10 knots or less becoming northeast.
Waves 1 foot or less.
.FRIDAY NIGHT...East winds 5 to 10 knots becoming south. Waves
1 foot or less.
.SATURDAY...South winds 10 knots or less becoming east. Waves
1 foot or less.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots becoming
southwest. Waves 1 foot or less.
.SUNDAY...Southwest winds 5 to 10 knots. A chance of showers and
thunderstorms during the day, then a chance of showers Sunday
night. Waves 1 foot or less.
.MONDAY...Southwest winds 5 to 10 knots. A chance of showers
during the day, then showers likely with a chance of
thunderstorms Monday night. Waves 2 feet or less.
.TUESDAY...West winds 10 to 15 knots becoming north. Showers
likely during the day, then a chance of showers Tuesday night.
Waves 1 to 3 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-240300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 PM EDT Thu Jul 23 2026

.TONIGHT...West winds 5 to 15 knots becoming southwest. Waves
1 to 3 feet subsiding to 1 foot or less.
.FRIDAY...Southwest winds 5 to 10 knots becoming northeast. Waves
1 foot or less.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots becoming south.
Waves 1 foot or less.
.SATURDAY...South winds 5 to 15 knots becoming southeast. Waves
2 feet or less.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots becoming south.
Waves 1 foot or less.
.SUNDAY...Southwest winds 10 knots or less. A chance of showers
Sunday night. Waves 1 foot or less.
.MONDAY...Southwest winds 5 to 15 knots becoming south. A chance
of showers and thunderstorms during the day, then showers likely
with a chance of thunderstorms Monday night. Waves 2 feet or
less.
.TUESDAY...Southwest winds 10 to 15 knots becoming north. Showers
likely with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms Tuesday night. Waves 1 to
3 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-240300-
MAFOR 2321/
ONTARIO WEST 1/2 15500 11600 11100. Waves 2 feet or less.

ONTARIO EAST 1/2 11610 11510 13500 12400 11800. Waves 1 to 3 feet
subsiding to 1 foot or less tonight. Waves 1 foot or less Friday.

$$