Lake Conroe Water Level Today - 199.98 ft, 95.2% Full

San Jacinto River · Texas - updated daily from official gauges

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

• Lake Conroe is 95.2% full - effectively full on this site's capacity scale - as of September 8, 2026. Surface elevation 199.98 feet, storage 397,567 acre-feet (capacity basis 417,577 acre-feet), per Texas Water Development Board data.
• That elevation is its lowest September reading since 2023, and 7.26 feet above its record low of 192.72 ft (December 3, 2011), in a daily record going back to October 2, 1996 (TWDB's period of record for this reservoir).
• Storage is 102% of the September 8 average across 30 years of record.
• Lake Conroe is falling: elevation changed -0.03 ft over the past week, -0.55 ft over the past month, and -0.98 ft over the past year, per Texas Water Development Board data.

Lake Conroe is holding near the top of its operating range at 95.2% of capacity, -0.98 ft over the past twelve months.

Lake Conroe operating range

Lake Conroe is operated within a narrow band rather than drawn down and refilled over years. As of September 8, 2026 it sits 1.02 feet below its 201.0 ft full-pool reference. Over the past two years the daily record ranges from 199.55 ft (October 30, 2024) to 201.81 ft (May 3, 2025) - a band of 2.26 feet. The highest reading in the full record is 205.91 ft on August 28, 2017.

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.

Lake Conroe storage in context

Lake Conroe water level, past 12 months

95.2% full at the latest reading - across the past 12 months it ranged from 94.1% (November 28, 2025) to 100.0% (July 20, 2026). Percent full is storage against the 417,577-acre-foot capacity basis, not a share of the elevation plotted above.

Lake Conroe elevation, full record

95.2% full at the latest reading - across the storage record since January 10, 1973 it ranged from 2.0% (January 10, 1973) to 103.2% (August 8, 1995). Percent full is storage against the 417,577-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 Conroe today?

As of September 8, 2026, Lake Conroe's surface elevation is 199.98 feet, with 397,567 acre-feet in storage - 95.2% of the 417,577 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is Lake Conroe?

Lake Conroe is 95.2% full as of September 8, 2026. Its storage is 102% of the September 8 average across its record since 1996. Source: Water Data for Texas (TWDB) daily data.

When was Lake Conroe last full?

Lake Conroe was last at or above 95% of its 417,577 acre-foot capacity basis on September 8, 2026. As of September 8, 2026 it is 95.2% full. Source: Water Data for Texas (TWDB) daily data.

Is Lake Conroe rising or falling?

Lake Conroe is falling: its elevation changed -0.03 feet over the week ending September 8, 2026, -0.55 ft over the past month, and -0.98 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

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

Lake Conroe's lowest surface elevation in the daily record since October 2, 1996 was 192.72 feet on December 3, 2011, per the daily record used by this site. As of September 8, 2026 the reservoir is 7.26 feet above that record low.

About this gauge

Lake Conroe is a Texas water-supply reservoir in the San Jacinto River basin. Water Data for Texas publishes a conservation pool elevation of 201.0 ft and a conservation capacity of 417,577 acre-feet, with daily water level and storage recorded since 1973-01-10.

Operator

Texas Water Development Board (Water Data for Texas)

Station

conroe

Measurements

Daily water level and conservation storage

River

San Jacinto River

State

Texas

Full pool reference

201.0 ft

Capacity basis

417,577 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

October 2, 1996 (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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