Reservoir · New South Wales · Australia · BOM Water Data Online
Lake Cawndilla
28.8% full
Capacity
631.1 hm³
Volume stored
182 hm³
Coordinates
32.473°S, 142.228°E
Last updated
2026-09-07
Current fill
28.8%vs 7 days ago
-0.4%losing
vs 1 year ago
-48.8%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: 2026-09-07.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -32.473, 142.228 · Open in Google Maps
About Lake Cawndilla
As of September 7, 2026, Lake Cawndilla is filled to 28.8% of its total capacity, holding roughly 182 hm³ of water out of a maximum 631 hm³. At this level the reservoir is low. Of that total, about 545 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (-0.4 pts), and it is 48.8 points below its level on the same date a year earlier.
Across the readings we hold for Lake Cawndilla — 1094 data points between September 10, 2023 and September 7, 2026 — the level has ranged from a low of 23.5% (April 21, 2025) to a high of 87.2% (September 29, 2025). On average the reservoir is fullest around October and at its lowest around April.
It is operated by BOM primarily for water supply.
Key facts
- Current fill level
- 28.8%
- Water stored
- 182 hm³
- Total capacity
- 631 hm³
- Usable capacity
- 545 hm³
- 7-day change
- ▼ 0.4 pts
- Year-on-year
- ▼ 48.8 pts
- Primary use
- Water supply
- Operator
- BOM
- Coordinates
- 32.473°S, 142.228°E
- Last updated
- September 7, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 7 Sep 2026 | 28.8% | 182 |
| 6 Sep 2026 | 28.9% | 182 |
| 5 Sep 2026 | 28.9% | 183 |
| 4 Sep 2026 | 28.9% | 183 |
| 3 Sep 2026 | 29.0% | 183 |
| 2 Sep 2026 | 29.1% | 184 |
| 1 Sep 2026 | 29.2% | 184 |
| 31 Aug 2026 | 29.2% | 184 |
| 30 Aug 2026 | 29.3% | 185 |
| 29 Aug 2026 | 29.4% | 185 |
| 28 Aug 2026 | 29.4% | 185 |
| 27 Aug 2026 | 29.4% | 186 |