720
FZUS61 KBUF 120302
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 PM EST Tue Nov 11 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 eastern Quebec will deepen to 28.2
inches as it slowly advances towards Newfoundland Wednesday. Another
29.2 inch low will develop south of Nova Scotia Thursday, then move
north across the Canadian Maritimes Friday, remaining in place
through Saturday. Meanwhile, a 30.1 inch high will then build from
northwest Ontario province Friday to James Bay and the lower Great
Lakes by Saturday.

LOZ062-121000-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 PM EST Tue Nov 11 2025

.REST OF TONIGHT...Southwest winds 20 to 25 knots. Rain late this
evening, then rain and snow after midnight. Rain late. Waves 5 to
8 feet. Waves occasionally around 10 feet.
.WEDNESDAY...Southwest winds to 30 knots becoming west. Rain in
the morning, then rain showers in the afternoon. Waves 5 to
8 feet building to 6 to 10 feet. Waves occasionally around
13 feet.
.WEDNESDAY NIGHT...West winds to 30 knots. Showers. Waves 6 to
9 feet. Waves occasionally around 11 feet.
.THURSDAY...West winds 20 to 25 knots. Showers likely. Waves 5 to
8 feet. Waves occasionally around 10 feet.
.THURSDAY NIGHT...West winds 15 to 20 knots. A chance of showers.
Waves 4 to 7 feet subsiding to 2 to 4 feet. Waves occasionally
around 9 feet.
.FRIDAY...Northwest winds 5 to 15 knots becoming north. A chance
of rain showers during the day. Waves 2 to 4 feet subsiding to
1 to 3 feet.
.SATURDAY...Northeast winds 5 to 15 knots becoming southeast.
Rain likely Saturday night. Waves 1 to 3 feet.
.SUNDAY...Southwest winds 15 to 25 knots becoming northwest. Rain
likely during the day, then showers likely Sunday night. Waves
3 to 5 feet building to 5 to 8 feet. Waves occasionally around
10 feet.

$$

LOZ063>065-121000-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 PM EST Tue Nov 11 2025

.REST OF TONIGHT...West winds to 30 knots becoming southwest.
Rain late this evening, then rain and snow after midnight. Waves
7 to 10 feet. Waves occasionally around 13 feet.
.WEDNESDAY...Southwest winds to 30 knots becoming west. Rain and
snow early, then rain late in the morning. Rain showers in the
afternoon. Waves 6 to 10 feet. Waves occasionally around 13 feet.
.WEDNESDAY NIGHT...West winds to 30 knots. Rain showers. Waves
6 to 10 feet. Waves occasionally around 13 feet.
.THURSDAY...West winds 15 to 25 knots increasing to 30 knots.
Rain showers. Waves 6 to 10 feet. Waves occasionally around
13 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots. Rain showers.
Waves 5 to 9 feet subsiding to 3 to 6 feet. Waves occasionally
around 11 feet.
.FRIDAY...Northwest winds 15 to 20 knots becoming north 10 to
15 knots. Rain showers likely during the day, then a chance of
rain and snow showers Friday night. Waves 3 to 5 feet subsiding
to 1 to 3 feet.
.SATURDAY...North winds 5 to 15 knots becoming southeast 15 to
20 knots. Rain likely Saturday night. Waves 1 to 3 feet.
.SUNDAY...South winds 15 to 25 knots becoming northwest to
30 knots. Rain likely during the day, then rain showers likely
Sunday night. Waves 3 to 5 feet building to 6 to 10 feet. Waves
occasionally around 13 feet.

$$

LOZ061-121000-
MAFOR 1204/
ONTARIO WEST 1/2 12537 12536 11636 12646 11636. Waves 5 to 9
feet, and occasionally around 11 feet overnight. Waves 5 to 8
feet building to 6 to 10 feet, and occasionally around 13 feet
Wednesday. Waves 6 to 10 feet, and occasionally around 13 feet
Wednesday evening.

ONTARIO EAST 1/2 11537 12547 12536 13636. Waves 7 to 10 feet, and
occasionally around 11 feet.

$$