127
FZUS61 KBUF 302003
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 PM EDT Wed Sep 30 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 30.1 inch high will continue to build across the
Eastern Seaboard, spanning across the eastern Great Lakes this
afternoon. A warm front will lift across the Lake Thursday, followed
by a cold front crossing the lower Great Lakes later Thursday night
and Friday morning. A 30.3 inch high is then forecast to build into
the western Great Lakes Friday night and over the eastern Great
Lakes by Saturday, before exiting into northern New England Sunday.
Meanwhile, a cold front will then cross the eastern Great Lakes
Sunday night, with another 30.3 inch high building from the western
Great Lakes into the eastern Great Lakes Monday and Tuesday.

LOZ062-010300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
403 PM EDT Wed Sep 30 2026

.TONIGHT...South winds 5 to 15 knots becoming southwest. A chance
of showers after midnight. Showers likely late. Waves 2 feet or
less.
.THURSDAY...South winds 10 to 15 knots becoming southwest 15 to
20 knots. Showers likely early, then a chance of showers late in
the morning. Waves 1 to 3 feet.
.THURSDAY NIGHT...Southwest winds 15 to 20 knots becoming west
10 to 15 knots. Showers. Waves 2 to 3 feet.
.FRIDAY...West winds 10 to 15 knots becoming northwest. Showers
likely. Waves 2 to 3 feet.
.FRIDAY NIGHT...Northwest winds 15 to 20 knots becoming north
10 to 15 knots. Waves 2 to 4 feet.
.SATURDAY...North winds 10 knots or less becoming southeast.
Waves 2 feet or less.
.SUNDAY...South winds 5 to 15 knots becoming northwest 15 to
20 knots. Waves 2 feet or less building to 2 to 4 feet.
.MONDAY...Northwest winds 15 to 20 knots becoming north 10 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.

$$

LOZ063>065-010300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
403 PM EDT Wed Sep 30 2026

.TONIGHT...Southeast winds 5 to 15 knots becoming southwest. A
chance of showers late. Waves 2 feet or less.
.THURSDAY...Southwest winds 10 to 15 knots becoming south. A
chance of showers through early afternoon. Waves 1 to 3 feet.
.THURSDAY NIGHT...Southwest winds 10 to 15 knots becoming west. A
chance of showers in the evening, then showers overnight. Waves
1 to 3 feet.
.FRIDAY...West winds 10 to 15 knots increasing to 15 to 20 knots.
Showers. Waves 1 to 3 feet building to 2 to 4 feet.
.FRIDAY NIGHT...Northwest winds 15 to 20 knots becoming north
10 to 15 knots. A chance of showers in the evening. Waves 3 to
5 feet subsiding to 2 to 4 feet.
.SATURDAY...North winds 5 to 15 knots becoming southeast 10 knots
or less. Waves 1 to 3 feet subsiding to 1 foot or less.
.SUNDAY...South winds 15 to 20 knots becoming west. Waves 1 to
3 feet building to 3 to 5 feet.
.MONDAY...Northwest winds 15 to 20 knots becoming north. Waves
3 to 5 feet subsiding to 2 to 4 feet.

$$

LOZ061-010300-
MAFOR 3021/
ONTARIO WEST 1/2 11410 11400 11500 12510 11410 12510. A chance of
showers overnight and Thursday morning. Waves 2 feet or less
tonight. Waves 1 to 3 feet Thursday.

ONTARIO EAST 1/2 12300 11400 12510 13410. A chance of showers
Thursday morning. Waves 2 feet or less tonight. Waves 1 to 3 feet
Thursday.

$$