Lewisville Lake

As of October 13, 2026, Lewisville Lake is filled to 83.4% of its total capacity, holding roughly 580 hm³ of water out of a maximum 695 hm³. At this level the reservoir is high.

Over the most recent week on record the fill level has held broadly steady (-0.8 pts), and it is 10.6 points below its level on the same date a year earlier.

Across the readings we hold for Lewisville Lake — 1460 data points between October 15, 2022 and October 13, 2026 — the level has ranged from a low of 74.7% (October 23, 2023) to a high of 100.0% (February 17, 2023). On average the reservoir is fullest around May and at its lowest around October.

It is operated by TWDB primarily for multiple purposes. It lies within the Texas basin at 33.069°N, 96.964°W.