Lake Cisco Water Level Today - 1,503.49 ft, 43.5% 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 Cisco is 43.5% full - low on this site's capacity scale - as of September 8, 2026. Surface elevation 1,503.49 feet, storage 12,602 acre-feet (capacity basis 29,003 acre-feet), per Texas Water Development Board data.
• That elevation is its lowest September reading since 2014, and 7.31 feet above its record low of 1,496.18 ft (July 14, 2013), in a daily record going back to February 11, 1999 (TWDB's period of record for this reservoir).
• Storage is 74% of the September 8 average across 28 years of record.
• Lake Cisco is falling: elevation changed -0.12 ft over the past week, -0.93 ft over the past month, and -4.07 ft over the past year, per Texas Water Development Board data.

Lake Cisco is within 7.31 feet of the lowest surface elevation in its daily record, set on July 14, 2013.

Lake Cisco vs its record low

In the daily record used by this site (going back to February 11, 1999 (TWDB's period of record for this reservoir)), Lake Cisco's lowest surface elevation was 1,496.18 feet on July 14, 2013, when storage was 8,782 acre-feet. As of September 8, 2026, Lake Cisco is at 1,503.49 feet - 7.31 feet above that record. The record high in the same series was 1,524.11 ft on June 3, 2016.

Lake Cisco storage in context

Lake Cisco water level, past 12 months

43.5% full at the latest reading - across the past 12 months it ranged from 43.4% (September 6, 2026) to 52.3% (September 8, 2025). Percent full is storage against the 29,003-acre-foot capacity basis, not a share of the elevation plotted above.

Lake Cisco elevation, full record

43.5% full at the latest reading - across the storage record since February 11, 1999 it ranged from 30.3% (July 14, 2013) to 100.0% (June 17, 2021). Percent full is storage against the 29,003-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 Cisco today?

As of September 8, 2026, Lake Cisco's surface elevation is 1,503.49 feet, with 12,602 acre-feet in storage - 43.5% of the 29,003 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is Lake Cisco?

Lake Cisco is 43.5% full as of September 8, 2026. Its storage is 74% of the September 8 average across its record since 1999. Source: Water Data for Texas (TWDB) daily data.

When was Lake Cisco last full?

Lake Cisco was last at or above 95% of its 29,003 acre-foot capacity basis on August 5, 2021. As of September 8, 2026 it is 43.5% full. Source: Water Data for Texas (TWDB) daily data.

Is Lake Cisco rising or falling?

Lake Cisco is falling: its elevation changed -0.12 feet over the week ending September 8, 2026, -0.93 ft over the past month, and -4.07 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

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

Lake Cisco's lowest surface elevation in the daily record since February 11, 1999 was 1,496.18 feet on July 14, 2013, per the daily record used by this site. As of September 8, 2026 the reservoir is 7.31 feet above that record low.

About this gauge

Lake Cisco is a Texas water-supply reservoir in the Brazos River basin. Water Data for Texas publishes a conservation pool elevation of 1,929.0 ft and a conservation capacity of 29,003 acre-feet, with daily water level and storage recorded since 1999-02-11.

Operator

Texas Water Development Board (Water Data for Texas)

Station

cisco

Measurements

Daily water level and conservation storage

River

Brazos River

State

Texas

Full pool reference

1,929.0 ft

Capacity basis

29,003 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

February 11, 1999 (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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