825
FZUS61 KBUF 272003
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
403 PM EDT Mon Jul 27 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 29.5 inch low over the western central Great Lakes
this evening will strengthen to 29.3 inches while moving southeast
into the lower Great Lakes tonight 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, before entering the
northern Atlantic Thursday and Friday. Meanwhile a 30.0 inch high
will slide across the Great Lakes Thursday and Friday.

LOZ062-280300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
403 PM EDT Mon Jul 27 2026

.TONIGHT...Southeast winds 5 to 15 knots becoming south. A chance
of showers and thunderstorms early, then showers with a chance of
thunderstorms from late evening on. Waves 2 feet or less.
.TUESDAY...Southeast winds 10 to 15 knots becoming north 15 to
20 knots. Showers with a chance of thunderstorms through early
afternoon, then a chance of showers and thunderstorms late. Waves
1 to 3 feet building to 2 to 4 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots. Showers likely with
a chance of thunderstorms in the evening, then showers likely
overnight. Waves 2 to 4 feet building to 3 to 6 feet.
.WEDNESDAY...North winds 15 to 25 knots. Showers in the morning,
then showers with a chance of thunderstorms in the afternoon.
Waves 3 to 6 feet.
.WEDNESDAY NIGHT...North winds 15 to 20 knots. Showers with a
chance of thunderstorms in the evening, then showers likely
overnight. Waves 2 to 4 feet.
.THURSDAY...North winds 5 to 15 knots becoming northwest. A
chance of showers during the day. Waves 1 to 3 feet subsiding to
1 foot or less.
.FRIDAY...Northwest winds less than 10 knots becoming southwest.
Waves 1 foot or less.
.SATURDAY...South winds less than 10 knots. A chance of showers
Saturday night. Waves 1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-280300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
403 PM EDT Mon Jul 27 2026

.TONIGHT...Southeast winds 5 to 15 knots becoming south. A chance
of showers and thunderstorms. Showers with a chance of
thunderstorms late. Waves 2 feet or less.
.TUESDAY...South winds 15 to 20 knots becoming northeast. Showers
with a chance of thunderstorms. Waves 1 to 3 feet building to
2 to 4 feet, then subsiding to 1 to 3 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots. Showers with a
chance of thunderstorms. Waves 2 to 4 feet building to 3 to
6 feet.
.WEDNESDAY...North winds 15 to 25 knots. Showers in the morning,
then showers with a chance of thunderstorms in the afternoon.
Waves 3 to 6 feet.
.WEDNESDAY NIGHT...North winds 15 to 20 knots. Showers with a
chance of thunderstorms in the evening, then showers overnight.
Waves 3 to 5 feet subsiding to 2 to 4 feet.
.THURSDAY...North winds 15 to 20 knots diminishing to 5 to
15 knots. A chance of showers during the day. Waves 2 to 4 feet
subsiding to 1 foot or less.
.FRIDAY...North winds 10 knots or less becoming southwest. Waves
1 foot or less.
.SATURDAY...South winds less than 10 knots. Waves 1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-280300-
MAFOR 2721/
ONTARIO WEST 1/2 11210 11300 11406 12416 11316 11110 11120. A
chance of thunderstorms. Waves 2 feet or less tonight. Waves 1 to
3 feet Tuesday.

ONTARIO EAST 1/2 13300 11410 11416 11326 11226 11126. A chance of
thunderstorms overnight and Tuesday. Waves 2 feet or less
tonight. Waves 1 to 3 feet Tuesday.

$$