740
FZUS61 KBUF 010302
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 PM EST Sun Nov 30 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 29.7 inch surface low near the Ontario/Quebec border
will track towards eastern Quebec and the Canadian Maritimes
overnight. 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 29.6 inch surface low off the Carolina
coastline Tuesday morning will deepen to 28.9 inches over southern
Atlantic Canada by early Wednesday morning before going out to sea.
A 30.2 inch surface high will build across the Ohio Valley and Lower
Great Lakes later Wednesday into Thursday morning before pushing off
the coast. A large 29.2 inch surface low near Hudson Bay will push
its cold front across the lake on Thursday, with another 30.4 inch
high building in its wake Thursday night. The high will then quickly
move east of the lake Friday.

LOZ062-011000-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 PM EST Sun Nov 30 2025

...GALE WARNING IN EFFECT UNTIL 4 AM EST MONDAY...

.REST OF TONIGHT...Northwest winds to 30 knots. A chance of snow
showers. Waves 10 to 14 feet subsiding to 7 to 10 feet. Waves
occasionally around 18 feet.
.MONDAY...Northwest winds 15 to 20 knots becoming southwest and
diminishing to less than 10 knots in the afternoon. Waves 4 to
7 feet subsiding to 2 feet or less. Waves occasionally around
9 feet.
.MONDAY NIGHT...South winds 10 knots or less. Snow overnight.
Waves 1 foot or less.
.TUESDAY...Southeast winds 5 to 10 knots becoming northwest. Snow
in the morning, then a chance of snow showers in the afternoon.
Waves 1 foot or less.
.TUESDAY NIGHT...Northwest winds 10 to 15 knots becoming west.
Waves 1 to 2 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming west to
30 knots. A chance of rain and snow showers during the day, then
snow showers likely with a chance of rain showers Wednesday
night. Waves 3 to 6 feet building to 7 to 10 feet. Waves
occasionally around 13 feet.
.THURSDAY...West winds to 30 knots diminishing to 10 to 15 knots.
Snow showers likely during the day, then a chance of snow showers
Thursday night. Waves 5 to 9 feet subsiding to 3 to 5 feet. Waves
occasionally around 11 feet.
.FRIDAY...Southwest winds 15 to 20 knots diminishing to 10 to
15 knots. A chance of snow showers Friday night. Waves 3 to
5 feet subsiding to 1 to 3 feet.

$$

LOZ063-011000-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
1002 PM EST Sun Nov 30 2025

...GALE WARNING IN EFFECT UNTIL 4 AM EST MONDAY...

.REST OF TONIGHT...West gales to 35 knots becoming northwest and
diminishing to 30 knots after midnight. A chance of rain showers
late this evening. Waves 10 to 14 feet. Waves occasionally around
18 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming west and
diminishing to 5 to 10 knots in the afternoon. Waves 6 to 9 feet
subsiding to 1 to 2 feet. Waves occasionally around 11 feet.
.MONDAY NIGHT...Southwest winds 10 knots or less becoming south
10 to 15 knots. Snow overnight. Waves 2 feet or less.
.TUESDAY...South winds 5 to 15 knots becoming north. Snow in the
morning, then a chance of snow showers in the afternoon. Waves
2 feet or less.
.TUESDAY NIGHT...North winds 10 to 15 knots becoming west. A
chance of snow showers overnight. Waves 1 to 3 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming west to
30 knots. A chance of snow showers during the day, then snow
showers likely with a chance of rain showers Wednesday night.
Waves 3 to 5 feet building to 6 to 10 feet. Waves occasionally
around 13 feet.
.THURSDAY...West winds to 30 knots diminishing to 15 to 20 knots.
Snow showers likely during the day, then a chance of snow showers
Thursday night. Waves 7 to 11 feet subsiding to 4 to 7 feet.
Waves occasionally around 14 feet.
.FRIDAY...Southwest winds 15 to 20 knots becoming south. A chance
of snow showers Friday night. Waves 3 to 5 feet subsiding to 2 to
4 feet.

$$

LOZ064-065-011000-
Lake Ontario open waters from Sodus Bay to the Saint Lawrence
River-
1002 PM EST Sun Nov 30 2025

...GALE WARNING IN EFFECT UNTIL 4 AM EST MONDAY...

.REST OF TONIGHT...West winds to 30 knots becoming northwest.
Lake effect rain showers with a chance of lake effect snow
showers late this evening, then a chance of rain and snow showers
after midnight. Waves 10 to 15 feet. Waves occasionally around
19 feet.
.MONDAY...Northwest winds 15 to 20 knots becoming west and
diminishing to 5 to 10 knots. Waves 6 to 9 feet subsiding to
2 feet or less. Waves occasionally around 11 feet.
.MONDAY NIGHT...Southwest winds 10 knots or less becoming south
10 to 15 knots. Snow overnight. Waves 1 to 3 feet.
.TUESDAY...Southeast winds 5 to 15 knots becoming north. Snow.
Waves 1 to 3 feet subsiding to 1 foot or less.
.TUESDAY NIGHT...North winds 5 to 15 knots becoming northwest. A
chance of snow showers. Waves 2 feet or less.
.WEDNESDAY...Southwest winds 15 to 20 knots increasing to
30 knots. A chance of snow showers during the day, then snow
showers with a chance of rain showers Wednesday night. Waves 3 to
5 feet building to 7 to 11 feet. Waves occasionally around
14 feet.
.THURSDAY...Northwest winds to 30 knots diminishing to 15 to
20 knots. Snow showers during the day, then a chance of snow
showers Thursday night. Waves 7 to 11 feet subsiding to 4 to
7 feet. Waves occasionally around 14 feet.
.FRIDAY...Southwest winds 15 to 25 knots becoming south. A chance
of snow showers during the day, then snow showers likely Friday
night. Waves 3 to 6 feet.

$$

LOZ061-011000-
MAFOR 0104/
ONTARIO WEST 1/2...GALE WARNING IN EFFECT...12740 11730 11720
11700 11600 12400. A chance of snow showers late this evening.
Waves 10 to 14 feet subsiding to 7 to 10 feet, and occasionally
around 18 feet overnight. Waves 5 to 8 feet subsiding to 1 to 3
feet, and occasionally around 10 feet Monday. Waves 1 foot or
less Monday evening.

ONTARIO EAST 1/2...GALE WARNING IN EFFECT...11650 11740 11730
11720 11710 11700 11500 11400. A chance of lake effect rain
showers late this evening, then a chance of snow showers
overnight. Waves 10 to 15 feet, and occasionally around 19 feet
overnight. Waves 6 to 9 feet subsiding to 2 feet or less, and
occasionally around 11 feet Monday. Waves 1 foot or less Monday
evening.

$$