Wright Patman Lake Water Level Today - 225.83 ft, 100.0% Full

Sulphur River · Texas - updated daily from official gauges

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

• Wright Patman Lake is 100.0% full - effectively full on this site's capacity scale - as of September 8, 2026. Surface elevation 225.83 feet, storage 122,593 acre-feet (capacity basis 122,593 acre-feet), per Texas Water Development Board data.
• That elevation is its highest September reading since 2022, and 5.44 feet above its record low of 220.39 ft (December 22, 1989), in a daily record going back to December 22, 1987 (TWDB's period of record for this reservoir).
• Storage is 57% of the September 8 average across 36 years of record.
• Wright Patman Lake is falling: elevation changed -0.16 ft over the past week, -0.83 ft over the past month, and +0.22 ft over the past year, per Texas Water Development Board data.

Wright Patman Lake is holding near the top of its operating range at 100.0% of capacity, +0.22 ft over the past twelve months.

Wright Patman Lake operating range

Wright Patman Lake is operated within a narrow band rather than drawn down and refilled over years. As of September 8, 2026 it sits 1,764.17 feet below its 1,990.0 ft full-pool reference. Over the past two years the daily record ranges from 222.13 ft (April 3, 2026) to 234.91 ft (April 14, 2025) - a band of 12.78 feet. The highest reading in the full record is 254.53 ft on May 10, 2016.

Storage above the full-pool reference is flood control space, not supply. A reservoir reading at or near 100% of its conservation capacity is being operated normally - it is not a surplus, and the operator may release water to hold that space.

Wright Patman Lake storage in context

Wright Patman Lake water level, past 12 months

100.0% full at the latest reading - it held within a tenth of a point of that across the past 12 months. Percent full is storage against the 122,593-acre-foot capacity basis, not a share of the elevation plotted above.

Wright Patman Lake elevation, full record

100.0% full at the latest reading - across the storage record since October 2, 1986 it ranged from 90.4% (October 2, 1986) to 253.2% (May 31, 2024). Percent full is storage against the 122,593-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 Wright Patman Lake today?

As of September 8, 2026, Wright Patman Lake's surface elevation is 225.83 feet, with 122,593 acre-feet in storage - 100.0% of the 122,593 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is Wright Patman Lake?

Wright Patman Lake is 100.0% full as of September 8, 2026. Its storage is 57% of the September 8 average across its record since 1987. Source: Water Data for Texas (TWDB) daily data.

When was Wright Patman Lake last full?

Wright Patman Lake was last at or above 95% of its 122,593 acre-foot capacity basis on September 8, 2026. As of September 8, 2026 it is 100.0% full. Source: Water Data for Texas (TWDB) daily data.

Is Wright Patman Lake rising or falling?

Wright Patman Lake is falling: its elevation changed -0.16 feet over the week ending September 8, 2026, -0.83 ft over the past month, and +0.22 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

What was Wright Patman Lake's lowest water level on record?

Wright Patman Lake's lowest surface elevation in the daily record since December 22, 1987 was 220.39 feet on December 22, 1989, per the daily record used by this site. As of September 8, 2026 the reservoir is 5.44 feet above that record low.

About this gauge

Wright Patman Lake is a Texas water-supply reservoir in the Sulphur River basin. Water Data for Texas publishes a conservation pool elevation of 1,990.0 ft and a conservation capacity of 122,593 acre-feet, with daily water level and storage recorded since 1986-10-02.

Operator

Texas Water Development Board (Water Data for Texas)

Station

wright-patman

Measurements

Daily water level and conservation storage

River

Sulphur River

State

Texas

Full pool reference

1,990.0 ft

Capacity basis

122,593 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

December 22, 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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