023
FZUS61 KBUF 302001
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
401 PM EDT Thu Jul 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 weak trough averaging 29.6 inches exits eastward while a ridge
averaging 30.0 inches builds from the western Great Lakes through
tonight. The ridge exits slowly eastward Friday through Saturday
before a cold front sweeps eastward across Lake Ontario on Sunday.
In the wake of the front, a 30.0 inch high builds over the western
Great Lakes builds southeast across the lower Great Lakes region
for Monday and Tuesday.

LOZ062-310300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
401 PM EDT Thu Jul 30 2026

.TONIGHT...Southwest winds 10 knots or less becoming west. Waves
1 foot or less.
.FRIDAY...West winds less than 10 knots becoming southwest. Waves
1 foot or less.
.FRIDAY NIGHT...South winds 10 knots or less becoming southwest.
Waves 1 foot or less.
.SATURDAY...Southwest winds 10 knots or less becoming east. Waves
1 foot or less.
.SATURDAY NIGHT...Northeast winds 5 to 10 knots becoming east. A
chance of showers in the evening, then showers overnight. Waves
1 foot or less.
.SUNDAY...Southeast winds 10 knots or less becoming northeast.
Showers with a chance of thunderstorms. Waves 1 foot or less.
.MONDAY...Northeast winds 5 to 10 knots. Waves 2 feet or less.
.TUESDAY...East winds 5 to 10 knots becoming southeast. Waves
1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-310300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
401 PM EDT Thu Jul 30 2026

.TONIGHT...West winds 5 to 15 knots. Waves 2 feet or less.
.FRIDAY...West winds 10 knots or less. Waves 1 foot or less.
.FRIDAY NIGHT...Southwest winds 10 knots or less becoming south.
Waves 1 foot or less.
.SATURDAY...South winds 10 knots or less becoming southeast.
Waves 1 foot or less.
.SATURDAY NIGHT...East winds 10 knots or less becoming southeast.
A chance of showers in the evening, then showers likely
overnight. Waves 1 foot or less.
.SUNDAY...South winds 5 to 15 knots becoming north. Showers with
a chance of thunderstorms. Waves 2 feet or less.
.MONDAY...North winds 5 to 15 knots. Waves 2 feet or less.
.TUESDAY...Southeast winds 10 knots or less becoming south. Waves
1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-310300-
MAFOR 3021/
ONTARIO WEST 1/2 11500 11600 11700 14600 11600. Waves 1 foot or
less.

ONTARIO EAST 1/2 11610 15600 11600. Waves 2 feet or less.

$$