Dam · Mpumalanga · South Africa · DWS
Grootdraai Dam
96.9% full
Total capacity
349.8 Mm³
River
Vaal River
Basin
Unknown
Primary use
water supply
Operator
DWS South Africa
Coordinates
-26.919°S, 29.295°E
Last updated
2026-08-31
Current fill
96.9%vs 7 days ago
0.0%stable
vs 1 year ago
N/A7-day trend
→stable
Weekly storage
Fill history — multi-year
About this dam
Data source
official
Storage data: Department of Water and Sanitation (DWS) Weekly State of Dams report, South Africa.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -26.919, 29.295 · Open in Google Maps
About Grootdraai Dam
As of August 31, 2026, Grootdraai Dam is filled to 96.9% of its total capacity, holding roughly 339 Mm³ of water out of a maximum 350 Mm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts).
Across the readings we hold for Grootdraai Dam — 14 data points between May 31, 2026 and August 31, 2026 — the level has ranged from a low of 96.9% (August 10, 2026) to a high of 100.0% (May 31, 2026).
It is operated by DWS South Africa primarily for water supply. It lies within the Unknown basin at 26.919°S, 29.295°E.
Key facts
- Current fill level
- 96.9%
- Water stored
- 339 Mm³
- Total capacity
- 350 Mm³
- 7-day change
- No change
- Primary use
- Water supply
- River
- Vaal River
- River basin
- Unknown
- Operator
- DWS South Africa
- Coordinates
- 26.919°S, 29.295°E
- Last updated
- August 31, 2026
Recent readings
| Date | Fill level | Volume (Mm³) |
|---|---|---|
| 31 Aug 2026 | 96.9% | 339 |
| 24 Aug 2026 | 96.9% | 339 |
| 17 Aug 2026 | 96.9% | 339 |
| 10 Aug 2026 | 96.9% | 339 |
| 3 Aug 2026 | 97.1% | 340 |
| 27 Jul 2026 | 98.6% | 345 |
| 29 Jun 2026 | 99.2% | 347 |
| 22 Jun 2026 | 99.4% | 348 |
| 16 Jun 2026 | 99.6% | 348 |
| 9 Jun 2026 | 99.6% | 348 |
| 8 Jun 2026 | 99.9% | 350 |
| 7 Jun 2026 | 99.9% | 350 |
Nearby reservoirs
See also: South Africa dam levels, explained — how the DWS Weekly State of Dams report becomes the national and provincial figures.