610
FZUS61 KBUF 122102
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 PM EST Wed Nov 12 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 28.2 inch low will slowly advance northwards across
Newfoundland tonight, as a 29.5 inch low crosses the Great Lakes.
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 build from
northwest Ontario province Friday to James Bay and the lower Great
Lakes by Saturday. A 29.2 inch low will track across the lake and to
New England through the day on Sunday.

LOZ062-130400-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 PM EST Wed Nov 12 2025

.TONIGHT...West winds to 30 knots. A chance of showers early,
then showers likely from late evening on. Waves 6 to 9 feet.
Waves occasionally around 11 feet.
.THURSDAY...West winds 20 to 25 knots. Showers likely in the
morning, then a chance of showers in the afternoon. Waves 5 to
8 feet. Waves occasionally around 10 feet.
.THURSDAY NIGHT...West winds 15 to 20 knots becoming northwest
10 to 15 knots. Showers likely. Waves 3 to 6 feet subsiding to
2 to 4 feet.
.FRIDAY...Northwest winds 10 to 15 knots. A chance of showers in
the morning. Waves 1 to 3 feet.
.FRIDAY NIGHT...North winds 5 to 10 knots becoming east. Waves
1 to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots becoming west 15 to
20 knots. A chance of rain during the day, then rain Saturday
night. Waves 1 foot or less building to 3 to 5 feet.
.SUNDAY...West winds to 30 knots. Rain showers likely during the
day, then rain showers likely with a chance of snow showers
Sunday night. Waves 5 to 9 feet subsiding to 4 to 7 feet. Waves
occasionally around 11 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. A chance of rain and snow showers
during the day. Waves 4 to 7 feet subsiding to 2 to 4 feet. Waves
occasionally around 9 feet.

$$

LOZ063-130400-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
402 PM EST Wed Nov 12 2025

.TONIGHT...West winds to 30 knots. Showers likely this evening,
then lake effect showers likely after midnight. Lake effect
showers with a few rumbles of thunder possible late. Waves 7 to
11 feet subsiding to 6 to 9 feet. Waves occasionally around
14 feet.
.THURSDAY...Northwest winds 20 to 25 knots. Lake effect showers
through early afternoon, then a chance of showers late. Waves
6 to 9 feet. Waves occasionally around 11 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 15 knots. Rain showers likely. Waves 4 to 7 feet subsiding
to 2 to 4 feet. Waves occasionally around 9 feet.
.FRIDAY...Northwest winds 10 to 15 knots. A chance of rain
showers. Waves 2 to 4 feet.
.FRIDAY NIGHT...North winds 5 to 10 knots becoming northeast.
Waves 1 to 2 feet.
.SATURDAY...Southeast winds 5 to 10 knots becoming west and
increasing to 15 to 20 knots. A chance of rain during the day,
then rain Saturday night. Waves 1 to 2 feet building to 3 to
5 feet.
.SUNDAY...West winds to 30 knots becoming northwest. Rain showers
likely during the day, then rain showers likely with a chance of
snow showers Sunday night. Waves 6 to 9 feet building to 7 to
11 feet, then subsiding to 6 to 9 feet. Waves occasionally around
14 feet.
.MONDAY...Northwest winds to 30 knots diminishing to 15 to
25 knots. A chance of rain and snow showers during the day. Waves
6 to 10 feet subsiding to 3 to 5 feet. Waves occasionally around
13 feet.

$$

LOZ064-065-130400-
Lake Ontario open waters from Sodus Bay to the Saint Lawrence
River-
402 PM EST Wed Nov 12 2025

.TONIGHT...West winds to 30 knots becoming northwest 15 to
25 knots. Rain showers. Waves 7 to 11 feet subsiding to 6 to
9 feet. Waves occasionally around 14 feet.
.THURSDAY...Northwest winds 15 to 25 knots. Rain showers through
early afternoon, then a chance of rain showers late. Waves 5 to
9 feet. Waves occasionally around 11 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 15 knots. Rain showers likely. Waves 4 to 7 feet subsiding
to 3 to 6 feet. Waves occasionally around 9 feet.
.FRIDAY...Northwest winds 10 to 15 knots. A chance of rain and
snow showers in the morning, then a chance of rain showers in the
afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots. Waves 1 to 3 feet
subsiding to 1 foot or less.
.SATURDAY...Southeast winds 5 to 15 knots becoming southwest
15 to 20 knots. A chance of rain during the day, then rain
Saturday night. Waves 1 to 3 feet building to 3 to 5 feet.
.SUNDAY...West winds to 30 knots becoming northwest. Rain showers
during the day, then rain and snow showers Sunday night. Waves
6 to 9 feet building to 7 to 11 feet, then subsiding to 6 to
9 feet. Waves occasionally around 14 feet.
.MONDAY...Northwest winds to 30 knots diminishing to 15 to
25 knots. Rain and snow showers likely during the day, then a
chance of rain showers Monday night. Waves 6 to 10 feet subsiding
to 3 to 6 feet. Waves occasionally around 13 feet.

$$

LOZ061-130400-
MAFOR 1222/
ONTARIO WEST 1/2 11640 12630 12636 12630 11730. Waves 6 to 10
feet, and occasionally around 13 feet tonight. Waves 5 to 8 feet,
and occasionally around 10 feet Thursday.

ONTARIO EAST 1/2 11646 12630 11636 13736 11730. Waves 7 to 11
feet subsiding to 6 to 9 feet, and occasionally around 14 feet
tonight. Waves 5 to 9 feet, and occasionally around 11 feet
Thursday.

$$