Reservoir · New South Wales · Australia · BOM Water Data Online
Tombullen
22.8% full
Capacity
11.2 hm³
Volume stored
3 hm³
Coordinates
34.648°S, 146.152°E
Last updated
2026-09-09
Current fill
22.8%vs 7 days ago
-68.6%losing
vs 1 year ago
-66.0%year-over-year
7-day trend
↓falling
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: 2026-09-09.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -34.648, 146.152 · Open in Google Maps
About Tombullen
As of September 9, 2026, Tombullen is filled to 22.8% of its total capacity, holding roughly 3 hm³ of water out of a maximum 11 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has fallen by 68.6 percentage points, and it is 66.0 points below its level on the same date a year earlier.
Across the readings we hold for Tombullen — 1075 data points between September 11, 2023 and September 9, 2026 — the level has ranged from a low of 4.6% (August 7, 2025) to a high of 96.2% (May 2, 2024). On average the reservoir is fullest around November and at its lowest around July.
It is operated by BOM primarily for water supply.
Key facts
- Current fill level
- 22.8%
- Water stored
- 3 hm³
- Total capacity
- 11 hm³
- 7-day change
- ▼ 68.6 pts
- Year-on-year
- ▼ 66.0 pts
- Primary use
- Water supply
- Operator
- BOM
- Coordinates
- 34.648°S, 146.152°E
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 22.8% | 3 |
| 8 Sep 2026 | 28.8% | 3 |
| 7 Sep 2026 | 39.0% | 4 |
| 6 Sep 2026 | 50.5% | 6 |
| 5 Sep 2026 | 61.8% | 7 |
| 4 Sep 2026 | 73.3% | 8 |
| 3 Sep 2026 | 84.8% | 10 |
| 2 Sep 2026 | 91.4% | 10 |
| 1 Sep 2026 | 92.7% | 10 |
| 31 Aug 2026 | 92.9% | 10 |
| 30 Aug 2026 | 93.2% | 10 |
| 29 Aug 2026 | 93.4% | 10 |