Reservoir · Victoria · Australia · BOM Water Data Online
O'Shannassy
101.5% full
Capacity
3.1 hm³
Volume stored
3 hm³
River
O'Shannassy River
Year completed
1928
Coordinates
37.673°S, 145.808°E
Last updated
2026-06-09
Current fill
101.5%vs 7 days ago
-0.8%losing
vs 1 year ago
+0.6%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: 2026-06-09.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -37.673, 145.808 · Open in Google Maps
About O'Shannassy
As of June 9, 2026, O'Shannassy is filled to 101.5% of its total capacity, holding roughly 3 hm³ of water out of a maximum 3 hm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has held broadly steady (-0.8 pts), and it sits close to where it was a year earlier.
Across the readings we hold for O'Shannassy — 1064 data points between June 12, 2023 and June 9, 2026 — the level has ranged from a low of 50.7% (April 24, 2025) to a high of 106.1% (October 4, 2023). On average the reservoir is fullest around August and at its lowest around May.
The dam at O'Shannassy was completed in 1928. It is operated by BOM primarily for water supply. It lies within the O'Shannassy River Basin basin at 37.673°S, 145.808°E.
Key facts
- Current fill level
- 101.5%
- Water stored
- 3 hm³
- Total capacity
- 3 hm³
- 7-day change
- ▼ 0.8 pts
- Year-on-year
- ▲ 0.6 pts
- Primary use
- Water supply
- River
- O'Shannassy River
- River basin
- O'Shannassy River Basin
- Year completed
- 1928
- Operator
- BOM
- Coordinates
- 37.673°S, 145.808°E
- Last updated
- June 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Jun 2026 | 101.5% | 3 |
| 8 Jun 2026 | 102.3% | 3 |
| 7 Jun 2026 | 102.5% | 3 |
| 6 Jun 2026 | 102.9% | 3 |
| 5 Jun 2026 | 104.2% | 3 |
| 4 Jun 2026 | 104.0% | 3 |
| 3 Jun 2026 | 101.0% | 3 |
| 2 Jun 2026 | 98.7% | 3 |
| 1 Jun 2026 | 97.4% | 3 |
| 31 May 2026 | 96.2% | 3 |
| 30 May 2026 | 95.7% | 3 |
| 29 May 2026 | 95.9% | 3 |
Frequently asked questions
What is the current water level of O'Shannassy?
As of June 9, 2026, O'Shannassy is at 101.5% of its capacity, holding approximately 3 hm³ of water, according to BOM data.
Is O'Shannassy reservoir full?
O'Shannassy is essentially full, sitting at 101.5% of capacity as of June 9, 2026.
Is the water level at O'Shannassy rising or falling?
The level at O'Shannassy has been broadly stable over the latest week on record (-0.8 points).
How much water can O'Shannassy hold?
O'Shannassy has a total capacity of 3 hm³.
Where is O'Shannassy reservoir located?
O'Shannassy is located in Victoria, Australia, within the O'Shannassy River Basin basin (coordinates 37.673°S, 145.808°E).
When was O'Shannassy dam built?
The dam at O'Shannassy was completed in 1928.
What is O'Shannassy used for?
O'Shannassy is used primarily for water supply, and is managed by BOM.