Lake Marble Falls water level today
On Oct 28, 2026, Lake Marble Falls is at 736.72 ft, 97.7% full (0.28 ft below full pool). That is 3.5 points above normal for this date.
Source: Texas Water Development Board · storage 7,426 of 7,597 acre-ft · provisional data
Lake Marble Falls percent full history
Percent full Normal range (10th–90th percentile, 1996–2025) Average
Records and key dates
- Record high
- 100.0%Jan 1, 1966
- Record low
- 0.0%Apr 29, 1999
- 12-month high
- 98.8%Sep 26, 2026
- 12-month low
- 89.0%Jul 20, 2026
- Last time full
- Jul 5, 2025
- Change in 1 year
- +0.39 ft+3.0 pts
About Lake Marble Falls
- River basin
- Colorado
- Full pool (top of conservation pool)
- 737.00 ft
- Conservation capacity
- 7,597 acre-ft
- Surface area today
- 608 acres
- Dead pool elevation
- 0.00 ft
- Flood control reservoir
- No
- Data since
- Jan 1, 1966
Monthly average, last 10 years
Average percent full each month.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 95% | 95% | 95% | 95% | 95% | 94% | 94% | 95% | 97% | 97% | — | — |
| 2025 | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% |
| 2024 | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 96% | 95% | 95% | 95% |
| 2023 | 76% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% |
| 2022 | 95% | 95% | 94% | 95% | 95% | 95% | 95% | 95% | 95% | 60% | 59% | 59% |
| 2021 | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 94% | 95% | 95% |
| 2020 | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% |
| 2019 | 58% | 53% | 69% | 95% | 95% | 95% | 95% | 96% | 95% | 95% | 94% | 95% |
| 2018 | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 94% | 93% |
| 2017 | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% | 95% |
Frequently asked questions
Is Lake Marble Falls full?
Not quite. On Oct 28, 2026 Lake Marble Falls was 97.7% full, 0.28 feet below its full pool elevation of 737.00 ft. It was last full on Jul 5, 2025.
What is the normal level of Lake Marble Falls for this time of year?
Between 1996 and 2025, Lake Marble Falls averaged 94.2% full around Oct 28, and 8 in 10 years it was between 94.2% and 97.4%. Today it is +3.5 percentage points above that average.
What is the lowest Lake Marble Falls has been?
In the TWDB record, which starts in 1966, the lowest daily value was 0.0% on Apr 29, 1999. The highest was 100.0% on Jan 1, 1966.
How often is the Lake Marble Falls water level updated?
TWDB publishes one reading per day for each reservoir. We check for new data every 2 hours and show the date of the reading next to the level. Recent values are provisional.
What does percent full mean?
It is the water stored in the conservation pool divided by the conservation capacity (7,597 acre-feet for Lake Marble Falls). Water above the conservation pool is flood storage and is not counted, so a reservoir can show 100% while rising into its flood pool.