Reservoir · Victoria · Australia · BOM Water Data Online
West Barwon Reservoir
76.5% full
Capacity
22.1 hm³
Volume stored
17 hm³
River
Barwon River East Branch
Year completed
1965
Coordinates
38.538°S, 143.720°E
Last updated
2026-09-08
Current fill
76.5%vs 7 days ago
-2.1%losing
vs 1 year ago
+46.7%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: 2026-09-08.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -38.538, 143.720 · Open in Google Maps
About West Barwon Reservoir
As of September 8, 2026, West Barwon Reservoir is filled to 76.5% of its total capacity, holding roughly 17 hm³ of water out of a maximum 22 hm³. At this level the reservoir is within its normal operating range. Of that total, about 22 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 2.1 percentage points, and it is 46.7 points above its level on the same date a year earlier.
Across the readings we hold for West Barwon Reservoir — 1095 data points between September 10, 2023 and September 8, 2026 — the level has ranged from a low of 15.9% (May 15, 2025) to a high of 79.9% (August 25, 2026). On average the reservoir is fullest around August and at its lowest around May.
The dam at West Barwon Reservoir was completed in 1965. It is operated by BOM primarily for water supply. It lies within the Barwon River East Branch Basin basin at 38.538°S, 143.720°E.
Key facts
- Current fill level
- 76.5%
- Water stored
- 17 hm³
- Total capacity
- 22 hm³
- Usable capacity
- 22 hm³
- 7-day change
- ▼ 2.1 pts
- Year-on-year
- ▲ 46.7 pts
- Primary use
- Water supply
- River
- Barwon River East Branch
- River basin
- Barwon River East Branch Basin
- Year completed
- 1965
- Operator
- BOM
- Coordinates
- 38.538°S, 143.720°E
- Last updated
- September 8, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 8 Sep 2026 | 76.5% | 17 |
| 7 Sep 2026 | 76.9% | 17 |
| 6 Sep 2026 | 77.2% | 17 |
| 5 Sep 2026 | 77.5% | 17 |
| 4 Sep 2026 | 77.8% | 17 |
| 3 Sep 2026 | 78.2% | 17 |
| 2 Sep 2026 | 78.4% | 17 |
| 1 Sep 2026 | 78.6% | 17 |
| 31 Aug 2026 | 78.9% | 17 |
| 30 Aug 2026 | 79.2% | 17 |
| 29 Aug 2026 | 79.4% | 18 |
| 28 Aug 2026 | 79.7% | 18 |