218
FZUS61 KBUF 092002
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 PM EDT Sat May 9 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 weak 29.5 inch low will move from the upper Great
Lakes tonight to western Quebec by early Sunday before moving to
northern Quebec early Monday. Meanwhile, a trailing cold front will
cross the lake tonight. A 30.4 inch high will then build from the
upper Great Lakes Monday to the lower Great Lakes by Tuesday. A 29.8
inch low will move across the lower Great Lakes into the Ohio Valley
Wednesday.

LOZ062-100300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 PM EDT Sat May 9 2026

.TONIGHT...Southwest winds 10 to 15 knots becoming west. A chance
of showers this evening. Waves 1 to 3 feet.
.SUNDAY...West winds 10 to 15 knots becoming southwest. Waves
1 to 2 feet.
.SUNDAY NIGHT...West winds 5 to 10 knots becoming northwest.
Waves 1 to 2 feet.
.MONDAY...Northwest winds 5 to 10 knots becoming west. Waves
2 feet or less.
.MONDAY NIGHT...West winds 5 to 10 knots becoming northwest.
Waves 2 feet or less.
.TUESDAY...West winds 10 knots or less becoming southeast 10 to
15 knots. Rain showers Tuesday night. Waves 2 feet or less.
.WEDNESDAY...Southeast winds 15 to 20 knots becoming north 10 to
15 knots. Showers. Waves 1 to 3 feet.
.THURSDAY...North winds 5 to 15 knots. A chance of showers during
the day. Waves 1 to 2 feet.

$$

LOZ063>065-100300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 PM EDT Sat May 9 2026

.TONIGHT...South winds 10 to 15 knots becoming west. Showers this
evening, then a chance of showers after midnight. Waves 1 to
3 feet building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.SUNDAY...West winds 10 to 15 knots increasing to 15 to 20 knots.
Waves 1 to 3 feet building to 2 to 4 feet.
.SUNDAY NIGHT...West winds 15 to 20 knots diminishing to 5 to
10 knots. Waves 2 to 4 feet subsiding to 1 foot or less.
.MONDAY...West winds 5 to 15 knots. Waves 1 to 3 feet.
.MONDAY NIGHT...West winds 5 to 15 knots becoming northwest.
Waves 1 to 3 feet.
.TUESDAY...Northwest winds 5 to 15 knots becoming southeast. Rain
showers likely Tuesday night. Waves 2 feet or less.
.WEDNESDAY...Southeast winds 15 to 20 knots becoming south 10 to
15 knots. Showers. Waves 1 to 3 feet.
.THURSDAY...Northwest winds 5 to 10 knots becoming north. A
chance of showers. Waves 2 feet or less.

$$

LOZ061-100300-
MAFOR 0921/
ONTARIO WEST 1/2 11410 12510 14610 11510. A chance of showers
this evening. Waves 1 to 3 feet.

ONTARIO EAST 1/2 11310 11426 11520 11510 12610 12620. Waves 1 to
3 feet building to 2 to 4 feet, then subsiding to 1 to 3 feet
tonight. Waves 1 to 3 feet building to 2 to 4 feet Sunday.

$$