704
FZUS61 KBUF 060902
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EST Sat Dec 6 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 cold front will cross the lake this late afternoon and
evening, while its associated 29.2 inch low remains stationary over
Hudson Bay. A weak 30.0 inch surface low and trough will cross the
lake on Sunday afternoon and evening. Another 30.4 inch high will
move across the region Monday through Monday night, before moving
off the east coast Tuesday. A 29.5 inch low will move across the
Upper Great Lakes Tuesday, then a stronger low averaging 29.3 inches
will approach the region Tuesday night and potentially move
northwest of the Lake Wednesday.

LOZ062-061600-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EST Sat Dec 6 2025

.TODAY...Southwest winds 20 to 25 knots becoming west. A chance
of snow showers. Waves 3 to 6 feet building to 5 to 8 feet. Waves
occasionally around 10 feet.
.TONIGHT...West winds 15 to 20 knots becoming north 5 to
15 knots. Waves 3 to 6 feet subsiding to 1 to 3 feet.
.SUNDAY...East winds 5 to 15 knots becoming north. Snow. Waves
1 to 2 feet.
.SUNDAY NIGHT...North winds 15 to 20 knots. Snow in the evening,
then a chance of snow overnight. Waves 2 to 4 feet.
.MONDAY...North winds 5 to 15 knots becoming south 15 to
20 knots. Waves 1 to 3 feet.
.TUESDAY...South winds to 30 knots becoming southwest and
diminishing to 15 to 20 knots. Snow likely during the day, then
rain and snow likely Tuesday night. Waves 4 to 7 feet building to
5 to 9 feet, then subsiding to 4 to 7 feet. Waves occasionally
around 11 feet.
.WEDNESDAY...South winds 15 to 25 knots becoming west to
30 knots. Rain with snow likely during the day, then rain and
snow showers likely Wednesday night. Waves 3 to 6 feet building
to 5 to 8 feet. Waves occasionally around 10 feet.

$$

LOZ063-061600-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
402 AM EST Sat Dec 6 2025

.TODAY...Southwest winds 15 to 25 knots becoming west. A chance
of snow showers. Waves 3 to 6 feet building to 5 to 8 feet. Waves
occasionally around 10 feet.
.TONIGHT...West winds 15 to 25 knots becoming north and
diminishing to 10 to 15 knots. A chance of snow showers late in
the evening. Waves 5 to 8 feet subsiding to 2 to 4 feet. Waves
occasionally around 10 feet.
.SUNDAY...Northeast winds 5 to 15 knots becoming southeast. A
chance of snow in the morning, then snow in the afternoon. Waves
1 to 3 feet.
.SUNDAY NIGHT...North winds 15 to 20 knots. Snow in the evening,
then a chance of snow overnight. Waves 1 to 3 feet building to
3 to 5 feet.
.MONDAY...North winds 15 to 20 knots becoming south. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TUESDAY...South winds 15 to 25 knots becoming southwest. Snow
likely during the day, then rain and snow likely Tuesday night.
Waves 2 to 4 feet building to 4 to 7 feet, then subsiding to 3 to
6 feet. Waves occasionally around 9 feet.
.WEDNESDAY...South winds 15 to 25 knots becoming west to
30 knots. Rain with snow likely during the day, then rain and
snow showers likely Wednesday night. Waves 3 to 5 feet building
to 6 to 10 feet. Waves occasionally around 13 feet.

$$

LOZ064-065-061600-
Lake Ontario open waters from Sodus Bay to the Saint Lawrence
River-
402 AM EST Sat Dec 6 2025

.TODAY...Southwest winds 15 to 25 knots. A chance of snow showers
this morning, then snow showers likely early this afternoon. Snow
and rain showers likely late. Waves 3 to 6 feet building to 5 to
8 feet. Waves occasionally around 10 feet.
.TONIGHT...West winds 15 to 25 knots becoming north and
diminishing to 10 to 15 knots. A chance of rain and snow showers
early, then a chance of snow showers. Waves 5 to 8 feet subsiding
to 2 to 4 feet. Waves occasionally around 10 feet.
.SUNDAY...Northeast winds 5 to 15 knots becoming east. A chance
of snow in the morning, then snow in the afternoon. Waves 1 to
3 feet.
.SUNDAY NIGHT...North winds 15 to 20 knots. Snow. Waves 1 to
3 feet building to 3 to 5 feet.
.MONDAY...North winds 15 to 20 knots becoming south. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TUESDAY...South winds to 30 knots becoming southwest. Snow
likely during the day, then rain and snow Tuesday night. Waves
3 to 6 feet building to 5 to 9 feet. Waves occasionally around
11 feet.
.WEDNESDAY...South winds to 30 knots becoming west. Rain and snow
during the day, then rain and snow showers Wednesday night. Waves
3 to 6 feet building to 7 to 10 feet. Waves occasionally around
13 feet.

$$

LOZ061-061600-
MAFOR 0610/
ONTARIO WEST 1/2 13530 11630 12620 11710 11810. A chance of snow
showers this morning. Waves 3 to 6 feet building to 5 to 8 feet,
and occasionally around 10 feet today. Waves 4 to 7 feet
subsiding to 1 to 3 feet, and occasionally around 9 feet tonight.

ONTARIO EAST 1/2 11520 13530 11630 11620 11720 11810. A chance of
snow and rain showers this afternoon. A chance of rain and snow
showers this evening. Waves 3 to 6 feet building to 5 to 8 feet,
and occasionally around 10 feet today. Waves 5 to 8 feet
subsiding to 2 to 4 feet, and occasionally around 10 feet
tonight.

$$