Lake Granbury Water Level Today - 690.65 ft, 88.0% Full

Brazos River · Texas - updated daily from official gauges

Western Reservoir Conditions·Daily·No. 47·Tuesday, September 8, 2026·Latest reading September 8, 2026

• Lake Granbury is 88.0% full - high on this site's capacity scale - as of September 8, 2026. Surface elevation 690.65 feet, storage 116,963 acre-feet (capacity basis 132,949 acre-feet), per Texas Water Development Board data.
• That elevation is its lowest September reading since 2022, and 9.15 feet above its record low of 681.50 ft (June 21, 2014), in a daily record going back to October 2, 1987 (TWDB's period of record for this reservoir).
• Storage is 91% of the September 8 average across 38 years of record.
• Lake Granbury is falling: elevation changed -0.16 ft over the past week, -0.61 ft over the past month, and -1.67 ft over the past year, per Texas Water Development Board data.

Lake Granbury has fallen 1.67 feet in twelve months, and now sits 9.15 feet above its record low.

Lake Granbury vs its record low

In the daily record used by this site (going back to October 2, 1987 (TWDB's period of record for this reservoir)), Lake Granbury's lowest surface elevation was 681.50 feet on June 21, 2014, when storage was 67,578 acre-feet. As of September 8, 2026, Lake Granbury is at 690.65 feet - 9.15 feet above that record. The record high in the same series was 692.96 ft on May 17, 1989.

Lake Granbury storage in context

Lake Granbury water level, past 12 months

88.0% full at the latest reading - across the past 12 months it ranged from 88.0% (September 8, 2026) to 100.0% (June 7, 2026). Percent full is storage against the 132,949-acre-foot capacity basis, not a share of the elevation plotted above.

Lake Granbury elevation, full record

88.0% full at the latest reading - across the storage record since October 2, 1972 it ranged from 50.8% (June 21, 2014) to 112.3% (October 27, 1991). Percent full is storage against the 132,949-acre-foot capacity basis, not a share of the elevation plotted above. Every percentage here is measured against today's capacity basis; a reservoir's surveyed capacity changes as sediment accumulates behind the dam, so early-record percentages are indicative rather than exact.

Last 14 daily readings

Frequently asked questions

What is the water level of Lake Granbury today?

As of September 8, 2026, Lake Granbury's surface elevation is 690.65 feet, with 116,963 acre-feet in storage - 88.0% of the 132,949 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is Lake Granbury?

Lake Granbury is 88.0% full as of September 8, 2026. Its storage is 91% of the September 8 average across its record since 1987. Source: Water Data for Texas (TWDB) daily data.

When was Lake Granbury last full?

Lake Granbury was last at or above 95% of its 132,949 acre-foot capacity basis on July 23, 2026. As of September 8, 2026 it is 88.0% full. Source: Water Data for Texas (TWDB) daily data.

Is Lake Granbury rising or falling?

Lake Granbury is falling: its elevation changed -0.16 feet over the week ending September 8, 2026, -0.61 ft over the past month, and -1.67 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

What was Lake Granbury's lowest water level on record?

Lake Granbury's lowest surface elevation in the daily record since October 2, 1987 was 681.50 feet on June 21, 2014, per the daily record used by this site. As of September 8, 2026 the reservoir is 9.15 feet above that record low.

About this gauge

Lake Granbury is a Texas water-supply reservoir in the Brazos River basin. Water Data for Texas publishes a conservation pool elevation of 692.7 ft and a conservation capacity of 132,949 acre-feet, with daily water level and storage recorded since 1972-10-02.

Operator

Texas Water Development Board (Water Data for Texas)

Station

granbury

Measurements

Daily water level and conservation storage

River

Brazos River

State

Texas

Full pool reference

692.7 ft

Capacity basis

132,949 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

October 2, 1987 (TWDB's period of record for this reservoir)

Status

Provisional - subject to revision by the reporting agency

Update cadence

Daily

TWDB reports conservation storage against a conservation capacity that is restated as new volumetric surveys are completed, so a percent-full figure here can change without the water level changing. TWDB's methodology page is linked in the notes below.

Download the daily CSV (date, elevation ft, storage AF) or see all data downloads.

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