830
FZUS61 KBUF 220202
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1002 PM EDT Mon Sep 21 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...An expansive 30.6 inch high will remain centered from
eastern Ontario province to southern Quebec through Saturday while
gradually weakening to 30.3 inches late this week. An elongated 29.6
inch low well offshore of the east coast Friday is forecast to
strengthen to 29.2 inches as it moves to just off the southern New
England coast Saturday night through Sunday.

LOZ062-220900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1002 PM EDT Mon Sep 21 2026

.OVERNIGHT...Northeast winds 15 to 20 knots. Waves 3 to
6 feet building to 5 to 7 feet. Waves occasionally around 9 feet.
.TUESDAY...Northeast winds 20 to 25 knots becoming east. Waves
5 to 8 feet. Waves occasionally around 10 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots. Waves 5 to 8 feet.
Waves occasionally around 10 feet.
.WEDNESDAY...East winds 15 to 20 knots. Waves 3 to 6 feet.
.WEDNESDAY NIGHT...East winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 3 to 6 feet subsiding to 2 to 4 feet.
.THURSDAY...East winds 10 to 15 knots becoming northeast. Waves
1 to 3 feet.
.FRIDAY...Northeast winds 5 to 15 knots becoming north. Waves
1 to 3 feet.
.SATURDAY...North winds 5 to 15 knots. Waves 1 to 3 feet.

$$

LOZ063>065-220900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1002 PM EDT Mon Sep 21 2026

.OVERNIGHT...Northeast winds 15 to 20 knots becoming east.
Waves 3 to 6 feet building to 4 to 7 feet. Waves occasionally
around 9 feet.
.TUESDAY...East winds 15 to 25 knots becoming northeast. Waves
4 to 7 feet subsiding to 3 to 6 feet. Waves occasionally around
9 feet.
.TUESDAY NIGHT...Northeast winds 15 to 20 knots becoming east.
Waves 3 to 6 feet.
.WEDNESDAY...East winds 15 to 20 knots becoming northeast. Waves
3 to 5 feet subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...East winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 2 to 4 feet.
.THURSDAY...East winds 10 to 15 knots becoming northeast. Waves
1 to 3 feet.
.FRIDAY...Northeast winds 10 to 15 knots becoming north 15 to
20 knots. Waves 1 to 3 feet building to 2 to 4 feet.
.SATURDAY...North winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.

$$

LOZ061-220900-
MAFOR 2203/
ONTARIO WEST 1/2 12120 13130 11230 11130 11230. Waves 3 to 6 feet
building to 5 to 7 feet, and occasionally around 9 feet
overnight. Waves 5 to 8 feet, and occasionally around 10 feet
Tuesday and Tuesday evening.

ONTARIO EAST 1/2 12120 11220 11120 11130 13120. Waves 3 to 6
feet.

$$