380
FZUS61 KBUF 130902
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EST Thu Nov 13 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 29.5 inch low crosses the Great Lakes early this
morning. Another 29.2 inch low will develop south of Nova Scotia
today, 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.

LOZ062-131600-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EST Thu Nov 13 2025

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

$$

LOZ063-131600-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
402 AM EST Thu Nov 13 2025

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

$$

LOZ064-065-131600-
Lake Ontario open waters from Sodus Bay to the Saint Lawrence
River-
402 AM EST Thu Nov 13 2025

.TODAY...Northwest winds 15 to 25 knots. Lake effect rain showers
this morning, then a chance of rain showers this afternoon. Waves
5 to 9 feet. Waves occasionally around 11 feet.
.TONIGHT...Northwest winds 15 to 20 knots diminishing to 10 to
15 knots. A chance of rain showers. 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
showers. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 5 to 10 knots becoming east. A chance
of rain showers in the evening. Waves 1 to 3 feet subsiding to
1 foot or less.
.SATURDAY...Southeast winds 5 to 10 knots becoming west and
increasing to 30 knots. Rain showers likely 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 and snow showers Monday night. Waves 6 to 10 feet
subsiding to 3 to 6 feet. Waves occasionally around 13 feet.

$$

LOZ061-131600-
MAFOR 1310/
ONTARIO WEST 1/2 11630 11640 11630 11730 13720 11710. A chance of
lake effect showers today. A chance of showers tonight. Waves 5
to 8 feet, and occasionally around 10 feet today. Waves 3 to 6
feet subsiding to 2 to 4 feet tonight.

ONTARIO EAST 1/2 12736 13730 12720 11710. Waves 5 to 9 feet, and
occasionally around 11 feet today. Waves 4 to 7 feet subsiding to
3 to 6 feet, and occasionally around 9 feet tonight.

$$