Reservoir · Western Australia · Australia · BOM Water Data Online
Stirling
52.3% full
Capacity
57.4 hm³
Volume stored
30 hm³
River
Harvey River
Year completed
1948
Coordinates
33.109°S, 116.044°E
Last updated
2026-10-20
Current fill
52.3%vs 7 days ago
+0.1 ppgaining
vs 1 year ago
-12.6 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
82%of normal
52.3% full on 2026-10-20, against an average of 63.8% for October across 4 years of readings (-11.5 points).
Rain over the last three months · 11 October 2026
Moderately dry
In the three months to 11 October 2026 the area around Stirling had well below normal rain, a shortfall seen about one year in six. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −1.29). Rain, not storage. Australia drought figures →
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: 2026-10-20.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 33.109°S, 116.044°E · Open in Google Maps
About Stirling
As of October 20, 2026, Stirling is filled to 52.3% of its total capacity, holding 30.01 hm³ of water out of a maximum 57.4 hm³. At this level the reservoir is within its normal operating range. Of that total, 55.6 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.1 pp), and it is 12.6 points below its level on the same date a year earlier.
Across the readings we hold for Stirling — 1049 data points between October 28, 2023 and October 20, 2026 — the level has ranged from a low of 43.1% (May 23, 2024) to a high of 71.5% (November 22, 2024). On average the reservoir is fullest around November and at its lowest around June.
The dam at Stirling was completed in 1948. It is operated by BOM primarily for water supply. It lies within the Harvey River Basin basin at 33.109°S, 116.044°E.
Key facts
- Current fill level
- 52.3% of total capacity
- Water stored
- 30.01 hm³
- Total capacity
- 57.4 hm³
- Usable capacity
- 55.6 hm³
- 7-day change
- ▲ 0.1 pp
- Year-on-year
- ▼ 12.6 pp
- Primary use
- Water supply
- River
- Harvey River
- River basin
- Harvey River Basin
- Year completed
- 1948
- Operator
- BOM
- Coordinates
- 33.109°S, 116.044°E
- Last updated
- October 20, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 20 Oct 2026 | 52.3% | 30.01 |
| 19 Oct 2026 | 52.4% | 30.07 |
| 18 Oct 2026 | 52.3% | 30.04 |
| 17 Oct 2026 | 52.2% | 29.98 |
| 16 Oct 2026 | 52.2% | 29.94 |
| 15 Oct 2026 | 52.2% | 29.96 |
| 14 Oct 2026 | 52.2% | 29.98 |
| 13 Oct 2026 | 52.2% | 29.97 |
| 12 Oct 2026 | 52.2% | 29.96 |
| 11 Oct 2026 | 52.2% | 29.95 |
| 10 Oct 2026 | 52.2% | 29.94 |
| 9 Oct 2026 | 52.1% | 29.92 |