618
FZUS61 KBUF 290721
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
221 AM EST Sat Nov 29 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 surface low over eastern Quebec this evening
will slide to NewFoundland overnight. Meanwhile, a 30.5 inch surface
high will build south into the mid-Mississippi Valley tonight, then
to the Ohio Valley and lower Great Lakes Saturday. Another surface
low will cut northeastward through the central Great Lakes Sunday,
slowly deepening from 29.6 inches Sunday morning to 29.4 inches
Sunday night over western Quebec. A cold front from this low will
cross the Lake late Sunday night. A 30.4 inch surface high centered
over the Central Plains will then build east across the Great Lakes
Monday, sliding quickly to New England on Tuesday. A 29.7 inch
surface low off the Carolina coastline Tuesday morning will deepen
to 28.9 inches over southern Atlantic Canada by Wednesday.

LOZ062-291000-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
221 AM EST Sat Nov 29 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
MORNING...

.OVERNIGHT...Northwest winds 15 to 25 knots. Waves 5 to
8 feet. Waves occasionally around 10 feet.
.SATURDAY...Northwest winds 15 to 20 knots becoming southwest
5 to 15 knots. Waves 3 to 6 feet subsiding to 1 to 3 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots becoming southeast
and increasing to 15 to 25 knots. A chance of snow showers in the
evening, then snow showers overnight. Waves 1 to 3 feet building
to 3 to 5 feet.
.SUNDAY...South winds to 30 knots becoming southwest and
increasing to 35 knot gales in the afternoon. Rain and snow
showers in the morning, then rain showers in the afternoon. Waves
3 to 6 feet building to 9 to 12 feet. Waves occasionally around
15 feet.
.SUNDAY NIGHT...West gales to 35 knots becoming northwest and
diminishing to 30 knots overnight. Rain showers likely with a
chance of snow showers in the evening, then a chance of snow
showers overnight. Waves 8 to 12 feet. Waves occasionally around
15 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming south and
diminishing to 5 to 10 knots. Snow showers likely Monday night.
Waves 5 to 8 feet subsiding to 2 feet or less. Waves occasionally
around 10 feet.
.TUESDAY...Southwest winds 5 to 15 knots becoming northwest. Snow
showers likely during the day, then a chance of snow showers
Tuesday night. Waves 1 to 2 feet.
.WEDNESDAY...West winds 15 to 20 knots increasing to 30 knots.
Snow showers likely Wednesday night. Waves 2 to 3 feet building
to 5 to 8 feet. Waves occasionally around 10 feet.

$$

LOZ063-291000-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
221 AM EST Sat Nov 29 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
MORNING...

.OVERNIGHT...Northwest winds 20 to 25 knots. A chance of
snow showers. Waves 7 to 10 feet. Waves occasionally around
13 feet.
.SATURDAY...Northwest winds 15 to 20 knots becoming west 5 to
15 knots. A chance of snow showers early. Waves 5 to 8 feet
subsiding to 2 to 4 feet. Waves occasionally around 10 feet.
.SATURDAY NIGHT...Southwest winds less than 10 knots becoming
southeast and increasing to 30 knots overnight. A chance of snow
showers in the evening, then snow showers overnight. Waves 1 to
2 feet building to 3 to 6 feet.
.SUNDAY...South winds to 30 knots becoming southwest. Snow and
rain showers. Waves 5 to 9 feet building to 7 to 10 feet. Waves
occasionally around 13 feet.
.SUNDAY NIGHT...Southwest winds to 30 knots becoming northwest.
Rain and snow showers likely in the evening, then snow showers
likely overnight. Waves 10 to 14 feet. Waves occasionally around
18 feet.
.MONDAY...Northwest winds to 30 knots becoming south and
diminishing to 5 to 15 knots. A chance of snow showers Monday
night. Waves 8 to 11 feet subsiding to 1 to 2 feet. Waves
occasionally around 14 feet.
.TUESDAY...South winds 10 to 15 knots becoming northwest. Snow
showers likely during the day, then a chance of snow showers
Tuesday night. Waves 1 to 3 feet.
.WEDNESDAY...West winds 15 to 25 knots increasing to 30 knots.
Snow showers likely Wednesday night. Waves 2 to 3 feet building
to 6 to 9 feet. Waves occasionally around 11 feet.

$$

LOZ064-065-291000-
Lake Ontario open waters from Sodus Bay to the Saint Lawrence
River-
221 AM EST Sat Nov 29 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
MORNING...

.OVERNIGHT...Northwest winds 20 to 25 knots. Waves 7 to
11 feet. Waves occasionally around 14 feet.
.SATURDAY...Northwest winds 15 to 25 knots becoming west and
diminishing to 5 to 15 knots. Waves 5 to 8 feet subsiding to 2 to
4 feet. Waves occasionally around 10 feet.
.SATURDAY NIGHT...Southwest winds less than 10 knots becoming
southeast and increasing to 30 knots overnight. Snow showers
overnight. Waves 1 to 3 feet building to 3 to 6 feet.
.SUNDAY...South winds to 30 knots becoming southwest and
increasing to 35 knot gales in the afternoon. Snow and rain
showers. Waves 5 to 8 feet building to 10 to 13 feet. Waves
occasionally around 16 feet.
.SUNDAY NIGHT...Southwest gales to 35 knots becoming northwest
and diminishing to 30 knots overnight. Rain and snow showers in
the evening, then snow showers, rain showers with a chance of
freezing rain overnight. Waves 10 to 15 feet. Waves occasionally
around 19 feet.
.MONDAY...Northwest winds to 30 knots becoming south and
diminishing to 15 to 20 knots. A chance of freezing rain during
the day, then a chance of snow showers Monday night. Waves 9 to
12 feet subsiding to 1 to 3 feet. Waves occasionally around
15 feet.
.TUESDAY...South winds 15 to 20 knots becoming north 10 to
15 knots. Snow showers. Waves 1 to 3 feet.
.WEDNESDAY...West winds 10 to 15 knots increasing to 30 knots. A
chance of snow showers during the day, then snow showers likely
Wednesday night. Waves 1 to 3 feet building to 5 to 9 feet. Waves
occasionally around 11 feet.

$$

LOZ061-291000-
MAFOR 2907 AMD/
ONTARIO WEST 1/2 11730 12720 11610 11600 11500 11310. A chance of
snow showers Saturday evening. Waves 5 to 9 feet, and
occasionally around 11 feet overnight. Waves 4 to 7 feet
subsiding to 1 to 3 feet, and occasionally around 9 feet
Saturday. Waves 1 to 2 feet Saturday evening.

ONTARIO EAST 1/2 12730 11720 12610 11600 11400. A chance of snow
showers overnight and Saturday morning. Waves 7 to 11 feet, and
occasionally around 14 feet overnight. Waves 5 to 8 feet
subsiding to 2 to 4 feet, and occasionally around 10 feet
Saturday. Waves 1 to 3 feet Saturday evening.

$$