Dam · Northern Cape · South Africa · DWS
Douglas Weir Dam
110.8% full
Total capacity
16.3 Mm³
River
Vaal River
Basin
Unknown
Primary use
water supply
Operator
DWS South Africa
Coordinates
-29.044°S, 23.835°E
Last updated
2026-08-31
Current fill
110.8%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. -29.044, 23.835 · Open in Google Maps
About Douglas Weir Dam
As of August 31, 2026, Douglas Weir Dam is filled to 110.8% of its total capacity, holding roughly 18 Mm³ of water out of a maximum 16 Mm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts).
Across the readings we hold for Douglas Weir Dam — 14 data points between May 31, 2026 and August 31, 2026 — the level has ranged from a low of 110.8% (August 24, 2026) to a high of 125.1% (May 31, 2026).
It is operated by DWS South Africa primarily for water supply. It lies within the Unknown basin at 29.044°S, 23.835°E.
Key facts
- Current fill level
- 110.8%
- Water stored
- 18 Mm³
- Total capacity
- 16 Mm³
- 7-day change
- No change
- Primary use
- Water supply
- River
- Vaal River
- River basin
- Unknown
- Operator
- DWS South Africa
- Coordinates
- 29.044°S, 23.835°E
- Last updated
- August 31, 2026
Recent readings
| Date | Fill level | Volume (Mm³) |
|---|---|---|
| 31 Aug 2026 | 110.8% | 18 |
| 24 Aug 2026 | 110.8% | 18 |
| 17 Aug 2026 | 111.3% | 18 |
| 10 Aug 2026 | 111.3% | 18 |
| 3 Aug 2026 | 111.8% | 18 |
| 27 Jul 2026 | 112.3% | 18 |
| 29 Jun 2026 | 114.8% | 19 |
| 22 Jun 2026 | 114.3% | 19 |
| 16 Jun 2026 | 117.3% | 19 |
| 9 Jun 2026 | 117.3% | 19 |
| 8 Jun 2026 | 115.8% | 19 |
| 7 Jun 2026 | 115.8% | 19 |
Nearby reservoirs
See also: South Africa dam levels, explained — how the DWS Weekly State of Dams report becomes the national and provincial figures.