Lake Granbury

As of October 14, 2026, Lake Granbury is filled to 87.0% of its total capacity, holding roughly 143 hm³ of water out of a maximum 164 hm³. At this level the reservoir is high.

Over the most recent week on record the fill level has held broadly steady (-0.9 pts), and it is 7.0 points below its level on the same date a year earlier.

Across the readings we hold for Lake Granbury — 1461 data points between October 15, 2022 and October 14, 2026 — the level has ranged from a low of 83.8% (October 23, 2022) to a high of 100.0% (July 10, 2023). On average the reservoir is fullest around July and at its lowest around October.

It is operated by TWDB primarily for multiple purposes. It lies within the Texas basin at 32.374°N, 97.689°W.