Dam · KwaZulu-Natal · South Africa · DWS
Nagle Dam
91.7% full
Total capacity
23.3 hm³
River
Mgeni River
Basin
Pongola-Mtamvuna
Primary use
water supply
Operator
DWS South Africa
Coordinates
29.591°S, 30.627°E
Last updated
2026-10-19
Current fill
91.7%vs 7 days ago
-4.5 pplosing
vs 1 year ago
-5.8 ppyear-over-year
7-day trend
↓falling
Drought context
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Nagle 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 −0.08). 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. 29.591°S, 30.627°E · Open in Google Maps
About Nagle Dam
As of October 19, 2026, Nagle Dam is filled to 91.7% of its total capacity, holding 21.4 hm³ of water out of a maximum 23.3 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has fallen by 4.5 percentage points, and it is 5.8 points below its level on the same date a year earlier.
Across the readings we hold for Nagle Dam — 20 data points between October 19, 2025 and October 19, 2026 — the level has ranged from a low of 91.7% (August 10, 2026) to a high of 100.5% (August 3, 2026). On average the reservoir is fullest around September and at its lowest around May.
It is operated by DWS South Africa primarily for water supply. It lies within the Pongola-Mtamvuna basin at 29.591°S, 30.627°E.
Key facts
- Current fill level
- 91.7% of total capacity
- Water stored
- 21.4 hm³
- Total capacity
- 23.3 hm³
- 7-day change
- ▼ 4.5 pp
- Year-on-year
- ▼ 5.8 pp
- Primary use
- Water supply
- River
- Mgeni River
- River basin
- Pongola-Mtamvuna
- Operator
- DWS South Africa
- Coordinates
- 29.591°S, 30.627°E
- Last updated
- October 19, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 19 Oct 2026 | 91.7% | 21.4 |
| 12 Oct 2026 | 96.2% | 22.4 |
| 5 Oct 2026 | 99.4% | 23.2 |
| 28 Sep 2026 | 100.5% | 23.4 |
| 21 Sep 2026 | 100.5% | 23.4 |
| 31 Aug 2026 | 93.2% | 21.7 |
| 24 Aug 2026 | 96.2% | 22.4 |
| 17 Aug 2026 | 93.5% | 21.7 |
| 10 Aug 2026 | 91.7% | 21.3 |
| 3 Aug 2026 | 100.5% | 23.4 |
| 27 Jul 2026 | 95.5% | 22.2 |
| 29 Jun 2026 | 99.9% | 23.2 |
Nearby reservoirs
See also: South Africa dam levels, explained — how the DWS Weekly State of Dams report becomes the national and provincial figures.