Dam · Eastern Cape · South Africa · DWS
Grassridge Dam
94.2% full
Total capacity
44.5 Mm³
River
Groot Brak River
Basin
Unknown
Primary use
water supply
Operator
DWS South Africa
Coordinates
-31.768°S, 25.466°E
Last updated
2026-10-05
Current fill
94.2%vs 7 days ago
+1.3%gaining
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. -31.768, 25.466 · Open in Google Maps
About Grassridge Dam
As of October 5, 2026, Grassridge Dam is filled to 94.2% of its total capacity, holding roughly 42 Mm³ of water out of a maximum 45 Mm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+1.3 pts).
Across the readings we hold for Grassridge Dam — 17 data points between May 31, 2026 and October 5, 2026 — the level has ranged from a low of 64.5% (June 29, 2026) to a high of 94.2% (October 5, 2026). On average the reservoir is fullest around October and at its lowest around June.
It is operated by DWS South Africa primarily for water supply. It lies within the Unknown basin at 31.768°S, 25.466°E.
Key facts
- Current fill level
- 94.2%
- Water stored
- 42 Mm³
- Total capacity
- 45 Mm³
- 7-day change
- ▲ 1.3 pts
- Primary use
- Water supply
- River
- Groot Brak River
- River basin
- Unknown
- Operator
- DWS South Africa
- Coordinates
- 31.768°S, 25.466°E
- Last updated
- October 5, 2026
Recent readings
| Date | Fill level | Volume (Mm³) |
|---|---|---|
| 5 Oct 2026 | 94.2% | 42 |
| 28 Sep 2026 | 92.9% | 41 |
| 21 Sep 2026 | 85.3% | 38 |
| 31 Aug 2026 | 68.6% | 31 |
| 24 Aug 2026 | 77.0% | 34 |
| 17 Aug 2026 | 80.9% | 36 |
| 10 Aug 2026 | 82.9% | 37 |
| 3 Aug 2026 | 85.9% | 38 |
| 27 Jul 2026 | 88.6% | 39 |
| 29 Jun 2026 | 64.5% | 29 |
| 22 Jun 2026 | 73.4% | 33 |
| 16 Jun 2026 | 72.5% | 32 |
Nearby reservoirs
See also: South Africa dam levels, explained — how the DWS Weekly State of Dams report becomes the national and provincial figures.