Live surface water temp (74.3°F), pool elevation (675.81 ft MSL), dam outflow, and 30-day hydrological history.
At 675.8 ft MSL, main public concrete ramps remain fully functional with sufficient trailer draft. Boaters should exercise standard vigilance around shallow sandbars when straying outside marked navigation channels.
Water line is situated 5.2 ft below normal conservation pool. Floating docks and gangways are operating at optimal gangway slope without mud grounding.
Surface water temperature of 74.3°F provides comfortable conditions for swimming, paddleboarding, and wakeboarding without thermal protection. Safety status is currently rated CLEAR.
Fresh multi-spectral overhead Earth observation from the European Space Agency (ESA) Sentinel-2 constellation (10m spatial resolution).
Satellite imagery and indices processed via Copernicus Data Space Ecosystem (CDSE) / Sentinel Hub API. Data reflects actual surface conditions at the time of orbital passage.
Derived from Band 4 red reflectance across open water pixels. Low reflectance indicates minimal suspended silt and high underwater visibility for angling and navigation.
Normalized Difference Chlorophyll Index (NDCI: 0.037) measures phytoplankton concentration using Red-Edge (B05) and Red (B04) bands to detect early bloom development before surface scums appear.
Normalized Difference Water Index (NDWI) contrasts Green and Near-Infrared spectra to map shallow shoals, sandbars, and exposed islands (like Sometimes Island on Travis or Wood Island on Texoma).
| Pool Benchmark | Elevation (ft MSL) | Difference from Current | Notes / Historical Significance |
|---|---|---|---|
| Current Level (Today) | 675.81 ft | — | Live observation from Lower Colorado River Authority (LCRA) |
| Normal Conservation Pool | 681.00 ft | -5.19 ft | Target design storage pool for recreation & water supply |
| Flood Control Pool (Top of Gates) | 714.00 ft | 38.19 ft remaining capacity | Water above this stage triggers emergency spillway discharge |
| Record Historical High | 710.40 ft | 34.59 ft above current | Recorded on 1991-12-25 |
| Record Historical Low | 614.18 ft | 61.63 ft above record | Recorded on 1951-08-14 |
Official daily snapshots from Lower Colorado River Authority (LCRA)
| Date | Elevation (ft MSL) | Daily Change | Inflow (cfs) | Release / Outflow (cfs) | Water Temp |
|---|---|---|---|---|---|
| 2026-09-18 | 642.17 ft | -0.01 ft | 880 | 967 | 77.1°F |
| 2026-09-17 | 642.18 ft | +0.01 ft | 810 | 909 | 77°F |
| 2026-09-16 | 642.17 ft | -0.01 ft | 864 | 844 | 76.6°F |
| 2026-09-15 | 642.18 ft | -0.03 ft | 734 | 944 | 76.6°F |
| 2026-09-14 | 642.21 ft | -0.01 ft | 704 | 890 | 77°F |
| 2026-09-13 | 642.22 ft | +0.03 ft | 925 | 894 | 76.9°F |
| 2026-09-12 | 642.19 ft | +0.02 ft | 788 | 891 | 76°F |
| 2026-09-11 | 642.17 ft | -0.03 ft | 834 | 919 | 75.3°F |
| 2026-09-10 | 642.20 ft | -0.07 ft | 692 | 906 | 75.8°F |
| 2026-09-09 | 642.27 ft | -0.04 ft | 789 | 845 | 76.9°F |
| 2026-09-08 | 642.31 ft | +0.01 ft | 931 | 974 | 77.4°F |
| 2026-09-07 | 642.30 ft | +0.02 ft | 748 | 871 | 77°F |
| 2026-09-06 | 642.28 ft | -0.01 ft | 807 | 840 | 76.4°F |
| 2026-09-05 | 642.29 ft | -0.03 ft | 693 | 1,017 | 76.5°F |
| 2026-09-04 | 642.32 ft | 0.00 ft | 876 | 814 | 76.8°F |
| 2026-09-03 | 642.32 ft | +0.03 ft | 888 | 880 | 76.4°F |
| 2026-09-02 | 642.29 ft | -0.01 ft | 710 | 1,016 | 75.7°F |
| 2026-09-01 | 642.30 ft | -0.05 ft | 800 | 774 | 75.5°F |
| 2026-08-31 | 642.35 ft | -0.07 ft | 729 | 938 | 76.4°F |
| 2026-08-30 | 642.42 ft | -0.01 ft | 931 | 972 | 77.4°F |
| 2026-08-29 | 642.43 ft | +0.03 ft | 808 | 780 | 77.5°F |
| 2026-08-28 | 642.40 ft | +0.02 ft | 698 | 973 | 76.7°F |
| 2026-08-27 | 642.38 ft | -0.03 ft | 817 | 916 | 76.1°F |
| 2026-08-26 | 642.41 ft | -0.02 ft | 776 | 826 | 76.3°F |
| 2026-08-25 | 642.43 ft | +0.01 ft | 938 | 962 | 76.6°F |
| 2026-08-24 | 642.42 ft | +0.01 ft | 720 | 886 | 76.2°F |
| 2026-08-23 | 642.41 ft | -0.03 ft | 727 | 880 | 75.7°F |
| 2026-08-22 | 642.44 ft | -0.06 ft | 845 | 913 | 76°F |
| 2026-08-21 | 642.50 ft | -0.05 ft | 811 | 903 | 77.1°F |
| 2026-08-20 | 642.55 ft | +0.02 ft | 899 | 904 | 77.7°F |
| 2026-08-19 | 642.53 ft | — | 658 | 862 | 77.2°F |
Never get caught off guard by rapid reservoir rises, dock-grounding low water, or dam spillway releases.
Low water hazard navigation, ramp launch advisories, and seasonal lake dynamics.
Navigating the Texas Hill Country when Mansfield Dam's conservation pool drops below 645 ft requires extreme vigilance. A detailed rundown of accessible public concrete ramps and hazardous submerged shoals.
