618
FZUS61 KBUF 301403
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 AM 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 29.9 inch will shift east into the Canadian Maritimes
today, while a 30.1 inch high builds just off the Mid Atlantic
coast. 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 on Monday.

LOZ062-302100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 AM EDT Wed Sep 30 2026

.THIS AFTERNOON...Southwest winds 5 to 10 knots becoming south.
Waves 2 feet or less.
.TONIGHT...South winds 5 to 15 knots becoming southwest. A chance
of showers after midnight. Waves 2 feet or less.
.THURSDAY...Southwest winds 10 to 15 knots. A chance of showers.
Waves 1 to 3 feet.
.THURSDAY NIGHT...Southwest winds 10 to 15 knots becoming west.
Showers. Waves 1 to 3 feet.
.FRIDAY...Northwest winds 10 to 15 knots. Showers during the day.
Waves 1 to 3 feet.
.SATURDAY...North winds 10 knots or less becoming southeast.
Waves 2 feet or less.
.SUNDAY...South winds 5 to 10 knots becoming northwest and
increasing to 15 to 20 knots. Waves 1 foot or less building to
3 to 5 feet.

$$

LOZ063>065-302100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 AM EDT Wed Sep 30 2026

.THIS AFTERNOON...South winds 5 to 10 knots becoming southeast.
Waves 2 feet or less.
.TONIGHT...South winds 5 to 15 knots becoming southwest. A chance
of showers late. Waves 2 feet or less.
.THURSDAY...South winds 15 to 20 knots becoming southwest 10 to
15 knots. A chance of showers. Waves 1 to 3 feet building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Southwest winds 10 to 15 knots. Showers. Waves
1 to 3 feet.
.FRIDAY...West winds 10 to 15 knots becoming north 15 to
20 knots. Showers during the day, then a chance of showers Friday
night. Waves 1 to 2 feet building 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 10 to 15 knots becoming west and increasing
to 15 to 25 knots. A chance of showers Sunday night. Waves 1 to
3 feet building to 3 to 6 feet.

$$

LOZ061-302100-
MAFOR 3015/
ONTARIO WEST 1/2 11500 13400 11500 13510. A chance of showers
Thursday morning. Waves 2 feet or less this afternoon and
tonight. Waves 1 to 3 feet Thursday morning.

ONTARIO EAST 1/2 12400 11300 13400 11510 11410. A chance of
showers Thursday morning. Waves 2 feet or less this afternoon and
tonight. Waves 1 to 3 feet Thursday morning.

$$