Lewisville Lake Water Level Today - 519.28 ft, 87.4% Full

Trinity River · Texas - updated daily from official gauges

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

• Lewisville Lake is 87.4% full - high on this site's capacity scale - as of September 8, 2026. Surface elevation 519.28 feet, storage 492,131 acre-feet (capacity basis 563,228 acre-feet), per Texas Water Development Board data.
• That elevation is its lowest September reading since 2023, and 12.23 feet above its record low of 507.05 ft (October 15, 2000), in a daily record going back to January 6, 1988 (TWDB's period of record for this reservoir).
• Storage is 102% of the September 8 average across 38 years of record.
• Lewisville Lake is falling: elevation changed -0.33 ft over the past week, -1.66 ft over the past month, and -1.57 ft over the past year, per Texas Water Development Board data.

Lewisville Lake has fallen 1.57 feet in twelve months, and now sits 12.23 feet above its record low.

Lewisville Lake vs its record low

In the daily record used by this site (going back to January 6, 1988 (TWDB's period of record for this reservoir)), Lewisville Lake's lowest surface elevation was 507.05 feet on October 15, 2000, when storage was 243,986 acre-feet. As of September 8, 2026, Lewisville Lake is at 519.28 feet - 12.23 feet above that record. The record high in the same series was 536.79 ft on May 31, 2015.

Lewisville Lake storage in context

Lewisville Lake water level, past 12 months

87.4% full at the latest reading - across the past 12 months it ranged from 87.4% (September 8, 2026) to 100.0% (July 19, 2026). Percent full is storage against the 563,228-acre-foot capacity basis, not a share of the elevation plotted above.

Lewisville Lake elevation, full record

87.4% full at the latest reading - across the storage record since November 2, 1954 it ranged from 0.0% (November 2, 1954) to 100.0% (July 19, 2026). Percent full is storage against the 563,228-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 Lewisville Lake today?

As of September 8, 2026, Lewisville Lake's surface elevation is 519.28 feet, with 492,131 acre-feet in storage - 87.4% of the 563,228 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is Lewisville Lake?

Lewisville Lake is 87.4% full as of September 8, 2026. Its storage is 102% of the September 8 average across its record since 1988. Source: Water Data for Texas (TWDB) daily data.

When was Lewisville Lake last full?

Lewisville Lake was last at or above 95% of its 563,228 acre-foot capacity basis on August 8, 2026. As of September 8, 2026 it is 87.4% full. Source: Water Data for Texas (TWDB) daily data.

Is Lewisville Lake rising or falling?

Lewisville Lake is falling: its elevation changed -0.33 feet over the week ending September 8, 2026, -1.66 ft over the past month, and -1.57 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

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

Lewisville Lake's lowest surface elevation in the daily record since January 6, 1988 was 507.05 feet on October 15, 2000, per the daily record used by this site. As of September 8, 2026 the reservoir is 12.23 feet above that record low.

About this gauge

Lewisville Lake is a Texas water-supply reservoir in the Trinity River basin. Water Data for Texas publishes a conservation pool elevation of 522.0 ft and a conservation capacity of 563,228 acre-feet, with daily water level and storage recorded since 1954-11-02.

Operator

Texas Water Development Board (Water Data for Texas)

Station

lewisville

Measurements

Daily water level and conservation storage

River

Trinity River

State

Texas

Full pool reference

522.0 ft

Capacity basis

563,228 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

January 6, 1988 (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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