146
FZUS61 KBUF 120802
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Fri Jun 12 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 cold front will cross the lake between this
morning and early this afternoon, with a 30.0 inch high then ridging
across the lower Great Lakes tonight through Sunday morning, before
a another cold front crosses the region later Sunday or Sunday
night. The eastern edge of a 30.1 inch high over the Plains states
will push over the lake on Monday, then a trough averaging 29.8
inches will cross the lake on Tuesday.

LOZ062-121500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Fri Jun 12 2026

.TODAY...South winds 10 to 15 knots becoming west 15 to 20 knots.
Waves 1 to 3 feet building to 3 to 5 feet.
.TONIGHT...West winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 15 knots becoming southwest. Waves
1 to 3 feet.
.SATURDAY NIGHT...Southwest winds 15 to 20 knots diminishing to
10 to 15 knots. Waves 1 to 3 feet.
.SUNDAY...Southwest winds 15 to 20 knots becoming west. Showers
with a chance of thunderstorms. Waves 1 to 3 feet building to
2 to 4 feet.
.MONDAY...West winds 5 to 15 knots becoming southwest. Waves 1 to
3 feet.
.TUESDAY...West winds 5 to 10 knots becoming south. Waves 1 foot
or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-121500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Fri Jun 12 2026

.TODAY...South winds 10 to 15 knots becoming west and increasing
to 15 to 25 knots. A chance of showers and thunderstorms. Waves
2 feet or less building to 3 to 6 feet.
.TONIGHT...West winds 15 to 25 knots becoming southwest and
diminishing to 5 to 15 knots. Waves 3 to 6 feet subsiding to 1 to
3 feet.
.SATURDAY...West winds 5 to 15 knots becoming southwest. Waves
1 to 3 feet.
.SATURDAY NIGHT...Southwest winds 10 to 15 knots becoming south.
Waves 1 to 2 feet.
.SUNDAY...South winds 10 to 15 knots becoming west 15 to
20 knots. Showers with a chance of thunderstorms during the day,
then showers Sunday night. Waves 1 to 3 feet building to 3 to
5 feet.
.MONDAY...West winds 15 to 20 knots becoming southwest 5 to
15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet.
.TUESDAY...Southwest winds 5 to 10 knots becoming south. Waves
2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-121500-
MAFOR 1209/
ONTARIO WEST 1/2 11400 11510 13620 11610 11600 11510. Waves 1 to
3 feet building to 3 to 5 feet today. Waves 2 to 4 feet subsiding
to 1 to 3 feet tonight.

ONTARIO EAST 1/2 12410 11520 12630 11610 11600 11500. A chance of
showers today. Waves 2 feet or less building to 3 to 6 feet
today. Waves 3 to 6 feet subsiding to 1 to 3 feet tonight.

$$