Reservoir · Western Australia · Australia · BOM Water Data Online
South Dandalup
17.9% full
Capacity
138 hm³
Volume stored
25 hm³
River
South Dandalup River
Year completed
1974
Coordinates
32.666°S, 116.086°E
Last updated
2026-09-06
Current fill
17.9%vs 7 days ago
+0.1%gaining
vs 1 year ago
+0.2%year-over-year
7-day trend
→stable
Data source: Bureau of Meteorology — Water Data Online (KiWIS) — daily mean storage volume, quality-controlled. Capacity from the BOM Water Storages ArcGIS layer (total design capacity in ML). Last reading: 2026-09-06.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -32.666, 116.086 · Open in Google Maps
About South Dandalup
As of September 6, 2026, South Dandalup is filled to 17.9% of its total capacity, holding roughly 25 hm³ of water out of a maximum 138 hm³. At this level the reservoir is critically low. Of that total, about 125 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.1 pts), and it sits close to where it was a year earlier.
Across the readings we hold for South Dandalup — 1044 data points between September 10, 2023 and September 6, 2026 — the level has ranged from a low of 13.9% (April 26, 2025) to a high of 27.2% (September 18, 2023). On average the reservoir is fullest around October and at its lowest around May.
The dam at South Dandalup was completed in 1974. It is operated by BOM primarily for water supply. It lies within the South Dandalup River Basin basin at 32.666°S, 116.086°E.
Key facts
- Current fill level
- 17.9%
- Water stored
- 25 hm³
- Total capacity
- 138 hm³
- Usable capacity
- 125 hm³
- 7-day change
- ▲ 0.1 pts
- Year-on-year
- ▲ 0.2 pts
- Primary use
- Water supply
- River
- South Dandalup River
- River basin
- South Dandalup River Basin
- Year completed
- 1974
- Operator
- BOM
- Coordinates
- 32.666°S, 116.086°E
- Last updated
- September 6, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 6 Sep 2026 | 17.9% | 25 |
| 5 Sep 2026 | 17.9% | 25 |
| 4 Sep 2026 | 17.9% | 25 |
| 3 Sep 2026 | 17.8% | 25 |
| 2 Sep 2026 | 17.8% | 25 |
| 1 Sep 2026 | 17.8% | 25 |
| 31 Aug 2026 | 17.8% | 25 |
| 30 Aug 2026 | 17.8% | 25 |
| 29 Aug 2026 | 17.8% | 25 |
| 28 Aug 2026 | 17.7% | 24 |
| 27 Aug 2026 | 17.7% | 24 |
| 26 Aug 2026 | 17.6% | 24 |