680
FZUS61 KBUF 060202
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 PM EDT Sat Sep 5 2026

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 large high pressure ridge averaging 30.1 inches will gradually
build from the upper Great Lakes tonight, southeast across the lower
Great Lakes region through Tuesday. The ridge will shift southeast
on Wednesday, allowing a warm front to sweep northeastward across
the Lake, followed by a cold front crossing the Lake later Wednesday
night into Thursday.

LOZ062-060900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 PM EDT Sat Sep 5 2026

.OVERNIGHT...North winds 5 to 10 knots becoming northeast.
Waves 2 feet or less.
.SUNDAY...Northeast winds 5 to 15 knots becoming east. Waves 1 to
3 feet.
.SUNDAY NIGHT...East winds less than 10 knots. Waves 1 foot or
less.
.MONDAY...West winds less than 10 knots becoming southwest. Waves
1 foot or less.
.MONDAY NIGHT...Southwest winds less than 10 knots becoming west.
Waves 1 foot or less.
.TUESDAY...Light and variable winds becoming south 5 to 10 knots.
Waves 1 foot or less.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming west. A
chance of showers. Waves 2 to 4 feet building to 5 to 8 feet.
Waves occasionally around 10 feet.
.THURSDAY...West winds 15 to 20 knots becoming northwest. Waves
3 to 6 feet subsiding to 2 to 4 feet.

$$

LOZ063>065-060900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 PM EDT Sat Sep 5 2026

.OVERNIGHT...North winds 5 to 15 knots becoming northeast.
A chance of showers. Waves 1 to 3 feet.
.SUNDAY...Northeast winds 10 to 15 knots. Waves 1 to 3 feet
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.SUNDAY NIGHT...North winds 10 knots or less becoming northwest.
Waves 2 feet or less.
.MONDAY...Northwest winds 10 knots or less becoming west. Waves
1 foot or less.
.MONDAY NIGHT...West winds 5 to 10 knots. Waves 1 foot or less.
.TUESDAY...West winds 10 knots or less becoming south 10 to
15 knots. Waves 2 feet or less.
.WEDNESDAY...South winds 15 to 25 knots becoming west to
30 knots. Showers likely. Waves 2 to 4 feet building to 4 to
7 feet. Waves occasionally around 9 feet.
.THURSDAY...West winds 15 to 25 knots becoming northwest. Waves
5 to 8 feet subsiding to 3 to 5 feet. Waves occasionally around
10 feet.

$$

LOZ061-060900-
MAFOR 0603/
ONTARIO WEST 1/2 12100 13110 11100 11200 11800. Waves 2 feet or
less overnight. Waves 1 to 3 feet Sunday and Sunday evening.

ONTARIO EAST 1/2 15110 12800. Waves 1 to 3 feet overnight and
Sunday. Waves 2 feet or less Sunday evening.

$$