Dam · North West · South Africa · DWS
Kosterrivier Dam
100.8% full
Total capacity
12.42 hm³
River
Koster River
Basin
Limpopo-Olifants
Primary use
water supply
Operator
DWS South Africa
Coordinates
25.700°S, 26.904°E
Last updated
2026-10-19
Current fill
100.8%vs 7 days ago
0.0 ppstable
vs 1 year ago
+1.6 ppyear-over-year
7-day trend
→stable
Drought context
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Kosterrivier Dam had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index +0.62). Rain, not storage. South Africa drought figures →
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
About Kosterrivier Dam
As of October 19, 2026, Kosterrivier Dam is filled to 100.8% of its total capacity, holding 12.5 hm³ of water out of a maximum 12.42 hm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has held broadly steady (+0.0 pp), and it is 1.6 points above its level on the same date a year earlier.
Across the readings we hold for Kosterrivier Dam — 20 data points between October 19, 2025 and October 19, 2026 — the level has ranged from a low of 99.2% (October 19, 2025) to a high of 102.9% (May 31, 2026). On average the reservoir is fullest around May and at its lowest around October.
It is operated by DWS South Africa primarily for water supply. It lies within the Limpopo-Olifants basin at 25.700°S, 26.904°E.
Key facts
- Current fill level
- 100.8% of total capacity
- Water stored
- 12.5 hm³
- Total capacity
- 12.42 hm³
- 7-day change
- No change
- Year-on-year
- ▲ 1.6 pp
- Primary use
- Water supply
- River
- Koster River
- River basin
- Limpopo-Olifants
- Operator
- DWS South Africa
- Coordinates
- 25.700°S, 26.904°E
- Last updated
- October 19, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 19 Oct 2026 | 100.8% | 12.5 |
| 12 Oct 2026 | 100.8% | 12.5 |
| 5 Oct 2026 | 100.8% | 12.5 |
| 28 Sep 2026 | 100.8% | 12.5 |
| 21 Sep 2026 | 100.8% | 12.5 |
| 31 Aug 2026 | 100.6% | 12.5 |
| 24 Aug 2026 | 100.8% | 12.5 |
| 17 Aug 2026 | 100.8% | 12.5 |
| 10 Aug 2026 | 100.8% | 12.5 |
| 3 Aug 2026 | 100.8% | 12.5 |
| 27 Jul 2026 | 100.8% | 12.5 |
| 29 Jun 2026 | 100.8% | 12.5 |
Nearby reservoirs
See also: South Africa dam levels, explained — how the DWS Weekly State of Dams report becomes the national and provincial figures.