Medina Lake Water Level Today - 1,021.55 ft, 29.5% Full

San Antonio River · Texas - updated daily from official gauges

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

• Medina Lake is 29.5% full - very low on this site's capacity scale - as of September 8, 2026. Surface elevation 1,021.55 feet, storage 75,281 acre-feet (capacity basis 254,823 acre-feet), per Texas Water Development Board data.
• That elevation is its highest September reading since 2021, and 52.81 feet above its record low of 968.74 ft (May 26, 2025), in a daily record going back to August 9, 1997 (TWDB's period of record for this reservoir).
• Storage is 55% of the September 8 average across 28 years of record.
• Medina Lake is falling: elevation changed -0.25 ft over the past week, -0.50 ft over the past month, and +37.63 ft over the past year, per Texas Water Development Board data.

Medina Lake has risen 37.63 feet in twelve months, to 55% of its September 8 storage average.

Medina Lake vs its record low

In the daily record used by this site (going back to August 9, 1997 (TWDB's period of record for this reservoir)), Medina Lake's lowest surface elevation was 968.74 feet on May 26, 2025, when storage was 4,910 acre-feet. As of September 8, 2026, Medina Lake is at 1,021.55 feet - 52.81 feet above that record. The record high in the same series was 1,072.00 ft on August 9, 1997.

Medina Lake storage in context

Medina Lake water level, past 12 months

29.5% full at the latest reading - across the past 12 months it ranged from 3.8% (May 19, 2026) to 30.1% (August 13, 2026). Percent full is storage against the 254,823-acre-foot capacity basis, not a share of the elevation plotted above.

Medina Lake elevation, full record

29.5% full at the latest reading - across the storage record since August 9, 1997 it ranged from 1.9% (May 26, 2025) to 100.0% (July 7, 2019). Percent full is storage against the 254,823-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 Medina Lake today?

As of September 8, 2026, Medina Lake's surface elevation is 1,021.55 feet, with 75,281 acre-feet in storage - 29.5% of the 254,823 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is Medina Lake?

Medina Lake is 29.5% full as of September 8, 2026. Its storage is 55% of the September 8 average across its record since 1997. Source: Water Data for Texas (TWDB) daily data.

When was Medina Lake last full?

Medina Lake was last at or above 95% of its 254,823 acre-foot capacity basis on August 19, 2019. As of September 8, 2026 it is 29.5% full. Source: Water Data for Texas (TWDB) daily data.

Is Medina Lake rising or falling?

Medina Lake is falling: its elevation changed -0.25 feet over the week ending September 8, 2026, -0.50 ft over the past month, and +37.63 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

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

Medina Lake's lowest surface elevation in the daily record since August 9, 1997 was 968.74 feet on May 26, 2025, per the daily record used by this site. As of September 8, 2026 the reservoir is 52.81 feet above that record low.

About this gauge

Medina Lake is a Texas water-supply reservoir in the San Antonio River basin. Water Data for Texas publishes a conservation pool elevation of 1,064.2 ft and a conservation capacity of 254,823 acre-feet, with daily water level and storage recorded since 1997-08-09.

Operator

Texas Water Development Board (Water Data for Texas)

Station

medina

Measurements

Daily water level and conservation storage

River

San Antonio River

State

Texas

Full pool reference

1,064.2 ft

Capacity basis

254,823 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

August 9, 1997 (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.

Other reservoirs tracked

Texas & Rio Grande: Lake Travis, Lake Buchanan, Canyon Lake, Amistad Reservoir, Falcon Lake, Elephant Butte Reservoir, Lake Abilene, Lake Alan Henry, Lake Amon G Carter, Aquilla Lake, Lake Arlington, Lake Arrowhead, Lake Athens, Lake Austin, B. A. Steinhagen Lake, Bardwell Lake, Belton Lake, Benbrook Lake, Lake Bob Sandlin, Bois d'Arc Lake, Lake Bonham, Brady Creek Reservoir, Bridgeport Reservoir, Lake Brownwood, Caddo Lake, Cedar Creek Reservoir, Champion Creek Reservoir, Lake Cherokee, Choke Canyon Reservoir, Lake Cisco, Lake Coleman, Coleto Creek Reservoir, Lake Colorado City, Comanche Creek Reservoir, Lake Conroe, Lake Corpus Christi, Lake Crook, Lake Cypress Springs, E. V. Spence Reservoir, Eagle Mountain Reservoir, Lake Fork Reservoir, Fort Phantom Hill Reservoir, Lake Georgetown, Gibbons Creek Reservoir, Lake Graham, Lake Granbury, Granger Lake, Grapevine Lake, Greenbelt Lake, Halbert Lake, Hords Creek Lake, Lake Houston, Houston County Lake, Hubbard Creek Reservoir, Moss Lake, Inks Lake, Lake J.B. Thomas, Lake Jacksonville, Cooper (Chapman) Lake, Joe Pool Lake, Lake Kemp, Lake Kickapoo, Lake O the Pines, Lavon Lake, Leon Reservoir, Lewisville Lake, Lake Limestone, Livingston Reservoir, Lost Creek Reservoir, Lake L. B. Johnson, Mackenzie Reservoir, Lake Marble Falls, Martin Lake, Lake Meredith, Millers Creek Reservoir, Lake Mineral Wells, Monticello Reservoir, Mountain Creek Lake, Murvaul Lake, Lake Nacogdoches, Lake Nasworthy, Navarro Mills Lake, New Terrell City Lake, Lake Nocona (Farmer's Creek), North Fork Buffalo Creek Reservoir, O. C. Fisher Lake, O. H. Ivie Reservoir, Oak Creek Reservoir, Lake Palestine, Palo Duro Reservoir, Lake Palo Pinto, Lake Pat Cleburne, Pat Mayse Lake, Possum Kingdom Lake, Proctor Lake, Lake Ray Hubbard, Ray Roberts Lake, Red Bluff Reservoir, Richland-Chambers Reservoir, Sam Rayburn Reservoir, Somerville Lake, Lake Stamford, Stillhouse Hollow Lake, Lake Striker, Lake Sulphur Springs, Lake Sweetwater, Lake Tawakoni, Lake Texana, Lake Texoma, Toledo Bend Reservoir, Twin Buttes Reservoir, Lake Tyler, Waco Lake, Lake Waxahachie, Lake Weatherford, White River Reservoir, Whitney Lake, Lake Worth, Wright Patman Lake.
Also: Lake Mead, Lake Powell, Lake Mohave, Lake Havasu, Flaming Gorge Reservoir, Blue Mesa Reservoir, Navajo Reservoir, Shasta Lake, Lake Oroville, Folsom Lake, Lake Berryessa, New Melones Lake, Trinity Lake, Don Pedro Reservoir, San Luis Reservoir.