818
FZUS61 KBUF 040902
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EST Thu Dec 4 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... Behind a strong early morning cold front passing over
the lake, a 30.4 inch high will build into the region its wake
through tonight. The high will then quickly move east of the lake
Friday. Another cold front will cross the Lake late Saturday and
Saturday night, this from a 29.3 inch low near northern James Bay.
Then, another area of surface high pressure averaging 30.3 inches
will build eastward across the Great Lakes through Sunday, moving
overhead Monday.

LOZ062-041600-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EST Thu Dec 4 2025

.TODAY...West winds to 30 knots becoming northwest 15 to
25 knots. A chance of lake effect snow showers. Waves 5 to
9 feet. Waves occasionally around 11 feet.
.TONIGHT...Northwest winds 15 to 20 knots becoming south 10 to
15 knots. Waves 3 to 5 feet subsiding to 1 to 2 feet.
.FRIDAY...South winds 10 to 15 knots becoming southwest 15 to
20 knots. Waves 1 to 3 feet building to 2 to 4 feet.
.FRIDAY NIGHT...Southwest winds 10 to 15 knots increasing to
15 to 20 knots. Waves 1 to 3 feet building to 2 to 4 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming northwest and
diminishing to 10 to 15 knots. Snow showers likely with a chance
of rain showers during the day, then a chance of snow and rain
showers Saturday night. Waves 3 to 6 feet subsiding to 2 to
4 feet.
.SUNDAY...North winds 10 to 15 knots. A chance of snow showers.
Waves 1 to 3 feet.
.MONDAY...North winds 10 to 15 knots becoming southwest. Waves
1 to 2 feet.

$$

LOZ063-041600-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
402 AM EST Thu Dec 4 2025

.TODAY...Northwest winds to 30 knots. A chance of snow showers
early, then lake effect snow showers likely. A chance of snow
showers late. Waves 6 to 9 feet building to 8 to 12 feet, then
subsiding to 7 to 10 feet. Waves occasionally around 15 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming south and
diminishing to 5 to 15 knots. Waves 5 to 8 feet subsiding to 1 to
3 feet. Waves occasionally around 10 feet.
.FRIDAY...South winds 15 to 20 knots becoming southwest 10 to
15 knots. Waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.FRIDAY NIGHT...Southwest winds 10 to 15 knots becoming south
15 to 20 knots. Waves 1 to 3 feet.
.SATURDAY...Southwest winds 15 to 20 knots becoming northwest.
Snow showers likely with a chance of rain showers during the day,
then a chance of snow and rain showers Saturday night. Waves 3 to
6 feet building to 4 to 7 feet, then subsiding to 3 to 5 feet.
Waves occasionally around 9 feet.
.SUNDAY...North winds 10 to 15 knots. A chance of snow showers.
Waves 2 to 4 feet subsiding to 1 to 3 feet.
.MONDAY...North winds 10 to 15 knots becoming south 15 to
20 knots. Waves 1 to 3 feet.

$$

LOZ064-065-041600-
Lake Ontario open waters from Sodus Bay to the Saint Lawrence
River-
402 AM EST Thu Dec 4 2025

.TODAY...Northwest winds to 30 knots. Lake effect snow showers
likely this morning, then a chance of snow showers this
afternoon. Waves 6 to 9 feet building to 7 to 11 feet. Waves
occasionally around 14 feet.
.TONIGHT...Northwest winds to 30 knots becoming southeast and
diminishing to 5 to 15 knots after midnight. A chance of snow
showers late. Waves 6 to 9 feet subsiding to 2 feet or less.
Waves occasionally around 11 feet.
.FRIDAY...South winds 15 to 25 knots. Waves 2 to 4 feet building
to 3 to 6 feet.
.FRIDAY NIGHT...South winds 15 to 20 knots. Waves 3 to 5 feet.
.SATURDAY...South winds 15 to 25 knots becoming northwest. Snow
and rain showers likely. Waves 3 to 6 feet building to 4 to
7 feet, then subsiding to 3 to 6 feet. Waves occasionally around
9 feet.
.SUNDAY...North winds 10 to 15 knots. Snow showers likely. Waves
2 to 4 feet subsiding to 1 to 3 feet.
.MONDAY...North winds 5 to 15 knots becoming south 15 to
20 knots. A chance of snow showers Monday night. Waves 1 to
3 feet.

$$

LOZ061-041600-
MAFOR 0410/
ONTARIO WEST 1/2 11730 12740 11730 11720 11710 11600 11500. A
chance of snow showers today. Waves 5 to 9 feet building to 6 to
10 feet, and occasionally around 13 feet today. Waves 3 to 6 feet
subsiding to 1 to 3 feet tonight.

ONTARIO EAST 1/2 11730 14740 11720 11700 11400. A chance of lake
effect snow showers today. Waves 6 to 9 feet building to 8 to 12
feet, then subsiding to 7 to 10 feet, and occasionally around 15
feet today. Waves 6 to 9 feet subsiding to 2 feet or less, and
occasionally around 11 feet tonight.

$$