Lake Houston Water Level Today
Daily level, percent full and history for Lake Houston, on the San Jacinto River in Texas.
Updated · Source: Texas Water Development BoardTWDB
Is Lake Houston full?
No. Lake Houston is 99.8% full, 0.02 ft below full pool. It is 0.11 ft higher than a year ago (42.25 ft on Nov 7, 2025).
Lake Houston level history
Full pool 42.4 ft
View data table
| Date | Level (ft) | % full |
|---|---|---|
| Nov 7, 2026 | 42.36 | 99.8% |
| Nov 6, 2026 | 42.37 | 99.9% |
| Nov 5, 2026 | 42.37 | 99.9% |
| Nov 4, 2026 | 42.37 | 99.9% |
| Nov 3, 2026 | 42.28 | 99.1% |
| Nov 2, 2026 | 42.23 | 98.7% |
| Nov 1, 2026 | 42.23 | 98.7% |
| Oct 31, 2026 | 42.21 | 98.5% |
| Oct 30, 2026 | 42.20 | 98.4% |
| Oct 29, 2026 | 42.18 | 98.3% |
| Oct 28, 2026 | 42.18 | 98.3% |
| Oct 27, 2026 | 42.17 | 98.2% |
| Oct 26, 2026 | 42.15 | 98.0% |
| Oct 25, 2026 | 42.16 | 98.1% |
| Oct 24, 2026 | 42.15 | 98.0% |
| Oct 23, 2026 | 42.15 | 98.0% |
| Oct 22, 2026 | 42.14 | 97.9% |
| Oct 21, 2026 | 42.13 | 97.8% |
| Oct 20, 2026 | 42.12 | 97.8% |
| Oct 19, 2026 | 42.11 | 97.7% |
| Oct 18, 2026 | 42.11 | 97.7% |
| Oct 17, 2026 | 42.21 | 98.5% |
| Oct 16, 2026 | 42.43 | 100% |
| Oct 15, 2026 | 42.42 | 100% |
| Oct 14, 2026 | 42.42 | 100% |
| Oct 13, 2026 | 42.41 | 100% |
| Oct 12, 2026 | 42.43 | 100% |
| Oct 11, 2026 | 42.44 | 100% |
| Oct 10, 2026 | 42.46 | 100% |
| Oct 9, 2026 | 42.50 | 100% |
| Oct 8, 2026 | 42.54 | 100% |
Full pool 42.4 ftLow 40.93 ft · Apr 17High 43.38 ft · Jul 15
View data table
| Month | Low (ft) | High (ft) |
|---|---|---|
| Nov 2026 | 42.23 | 42.37 |
| Oct 2026 | 42.11 | 42.65 |
| Sep 2026 | 41.23 | 42.60 |
| Aug 2026 | 42.09 | 42.41 |
| Jul 2026 | 42.05 | 43.38 |
| Jun 2026 | 42.15 | 42.96 |
| May 2026 | 41.40 | 43.04 |
| Apr 2026 | 40.93 | 42.65 |
| Mar 2026 | 42.22 | 42.91 |
| Feb 2026 | 42.27 | 42.85 |
| Jan 2026 | 42.19 | 42.80 |
| Dec 2025 | 42.16 | 42.84 |
| Nov 2025 | 42.07 | 42.95 |
Full pool 42.4 ft
View data table
| Year | Low (ft) | High (ft) |
|---|---|---|
| 2026 | 40.93 | 43.38 |
| 2025 | 40.96 | 43.21 |
| 2024 | 41.38 | 48.15 |
| 2023 | 41.38 | 44.24 |
| 2022 | 41.64 | 43.25 |
| 2021 | 41.42 | 44.00 |
| 2020 | 41.01 | 42.98 |
| 2019 | 40.99 | 47.58 |
| 2018 | 40.27 | 44.15 |
| 2017 | 41.52 | 52.28 |
| 2016 | 42.13 | 43.10 |
Full pool 42.4 ftHighest 52.28 ft · Aug 29, 2017Lowest 36.34 ft · Sep 5, 2011
View data table
| Decade | Low (ft) | High (ft) |
|---|---|---|
| 2020s | 40.93 | 48.15 |
| 2010s | 36.36 | 52.28 |
| 2000s | 41.10 | 48.66 |
| 1990s | 40.81 | 49.96 |
- Lake Houston level
- Full pool 42.4 ft
- Above full pool
Lake Houston on Nov 7 in past years
| Year | Level (ft) | vs today | % full |
|---|---|---|---|
| 2026today | 42.36 | — | |
| 2025 | 42.25 | −0.11 | |
| 2024 | 42.74 | +0.38 | |
| 2023 | 42.42 | +0.06 | |
| 2022 | 42.45 | +0.09 | |
| 2021 | 42.56 | +0.20 | |
| 2020 | 41.87 | −0.49 | |
| 2019 | 41.57 | −0.79 | |
| 2018 | 42.08 | −0.28 | |
| 2017 | 42.00 | −0.36 | |
| 2016 | 42.13 | −0.23 |
Today’s level is the highest for this date since 2024.
Lake facts
- Conservation capacity
- 132,318 acre-ft
- Surface area today
- 11,434 acres
- Highest since 1996
- 52.28 ftAug 29, 2017
- Lowest since 1996
- 36.34 ftSep 5, 2011
- Data since
- Jul 19, 1996
- Dam
- Lake Houston Damcompleted 1954
- River
- San Jacinto River
- Owned by
- City of Houston
- Dam location
- Harris County
- Gauge location
- 29.9163, −95.1413
Dam, river and owner from the National Inventory of Dams (USACE). Records cover Jul 19, 1996 to today (daily averages).
San Jacinto River chain
UpstreamSan Jacinto RiverDownstream
- Lake Conroe199.31 ft92.1% full−1.69 ft vs full pool
- Lake Houston42.36 ft99.8% full−0.02 ft vs full poolYou are here
Weather on the lake
- Tonight58°FLowE 5–10 mphMostly Cloudy
- Sunday71°FHighLow 57°FNE 5–10 mphChance Rain Showers
- Monday70°FHighLow 56°FNE 0–5 mphMostly Cloudy then Slight Chance Rain Showers
- Tuesday76°FHighLow 61°FCalmPartly Sunny then Slight Chance Rain Showers
- Wednesday76°FHighLow 60°FCalmChance Showers and Thunderstorms
- Thursday76°FHighLow 52°FNW 5–10 mphMostly Sunny
- Friday71°FHighLow 49°FN 5 mphSunny
Forecast: National Weather Service for the dam area (29.92, −95.14). Wind speeds are forecasts, not measurements.
Nearby lakes
Quick answers
What is the full pool level of Lake Houston?
42.4 ft above mean sea level, the top of its conservation pool. Above it, water is released or flows over the spillway of Lake Houston Dam.
How much does Lake Houston need to be full?
Lake Houston needs 0.02 ft more water to reach full pool (42.4 ft), or about 228 acre-ft of storage, as of Nov 7, 2026.
Is Lake Houston rising or falling?
It is rising: +0.15 ft in the last 7 days and −0.01 ft in 24 hours, to 42.36 ft on Nov 7, 2026 (Texas Water Development Board).
When was Lake Houston last full?
It was last at or above full pool (42.4 ft) on Oct 16, 2026. On Nov 7, 2026 it was 0.02 ft below.
What is the highest level in our data?
Lake Houston reached 52.28 ft on Aug 29, 2017. The lowest was 36.34 ft on Sep 5, 2011 (TWDB data since 1996; older records are not in this data set).
How much has Lake Houston changed in the last year?
In the last 12 months it ranged from 40.93 ft (Apr 17, 2026) to 43.38 ft (Jul 15, 2026), a swing of 2.45 ft.
How often is this page updated?
This page is updated every morning with the daily reading published by the Texas Water Development Board. The last reading is from Nov 7, 2026.
Where this data comes from
Daily reservoir data from the Texas Water Development Board (Lake Houston on waterdatafortexas.org). Updated every morning. Weather from the National Weather Service. Dam details from the National Inventory of Dams.
Lake Levels Daily is an independent site, not affiliated with TWDB, LCRA, USACE, USGS, NOAA, TVA or any lake operator. Check official sources before making safety decisions.