Dam · Eastern Cape · South Africa · DWS
Lake Arthur Dam
99.5% full
Total capacity
11.3 hm³
River
Tarka River
Basin
Mzimvubu-Tsitsikamma
Primary use
water supply
Operator
DWS South Africa
Coordinates
32.226°S, 25.819°E
Last updated
2026-10-19
Current fill
99.5%vs 7 days ago
+7.2 ppgaining
vs 1 year ago
+76.4 ppyear-over-year
7-day trend
↑rising
Drought context
Rain over the last three months · 11 October 2026
Moderately wet
In the three months to 11 October 2026 the area around Lake Arthur Dam had more rain than 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 +1.44). 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
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 32.226°S, 25.819°E · Open in Google Maps
About Lake Arthur Dam
As of October 19, 2026, Lake Arthur Dam is filled to 99.5% of its total capacity, holding 11.2 hm³ of water out of a maximum 11.3 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has risen by 7.2 percentage points, and it is 76.4 points above its level on the same date a year earlier.
Across the readings we hold for Lake Arthur Dam — 20 data points between October 19, 2025 and October 19, 2026 — the level has ranged from a low of 23.1% (October 19, 2025) to a high of 99.5% (October 19, 2026). On average the reservoir is fullest around October and at its lowest around May.
It is operated by DWS South Africa primarily for water supply. It lies within the Mzimvubu-Tsitsikamma basin at 32.226°S, 25.819°E.
Key facts
- Current fill level
- 99.5% of total capacity
- Water stored
- 11.2 hm³
- Total capacity
- 11.3 hm³
- 7-day change
- ▲ 7.2 pp
- Year-on-year
- ▲ 76.4 pp
- Primary use
- Water supply
- River
- Tarka River
- River basin
- Mzimvubu-Tsitsikamma
- Operator
- DWS South Africa
- Coordinates
- 32.226°S, 25.819°E
- Last updated
- October 19, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 19 Oct 2026 | 99.5% | 11.2 |
| 12 Oct 2026 | 92.3% | 10.4 |
| 5 Oct 2026 | 94.6% | 10.7 |
| 28 Sep 2026 | 65.5% | 7.4 |
| 21 Sep 2026 | 63.7% | 7.2 |
| 31 Aug 2026 | 63.1% | 7.1 |
| 24 Aug 2026 | 63.5% | 7.2 |
| 17 Aug 2026 | 64.2% | 7.2 |
| 10 Aug 2026 | 63.8% | 7.2 |
| 3 Aug 2026 | 63.8% | 7.2 |
| 27 Jul 2026 | 63.3% | 7.1 |
| 29 Jun 2026 | 61.9% | 7 |
Nearby reservoirs
See also: South Africa dam levels, explained — how the DWS Weekly State of Dams report becomes the national and provincial figures.