Reservoir · Victoria · Australia · BOM Water Data Online
Upper Coliban
100.2% full
Capacity
37.8 hm³
Volume stored
38 hm³
River
Coliban river
Year completed
1903
Coordinates
37.290°S, 144.401°E
Last updated
2026-10-25
Current fill
100.2%vs 7 days ago
+0.2 ppgaining
vs 1 year ago
+38.3 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
121%of normal
100.2% full on 2026-10-25, against an average of 82.5% for October across 4 years of readings (+17.7 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Upper Coliban had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index +0.17). 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: 2026-10-25.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 37.290°S, 144.401°E · Open in Google Maps
About Upper Coliban
As of October 25, 2026, Upper Coliban is filled to 100.2% of its total capacity, holding 37.83 hm³ of water out of a maximum 37.8 hm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has held broadly steady (+0.2 pp), and it is 38.3 points above its level on the same date a year earlier.
Across the readings we hold for Upper Coliban — 1080 data points between October 28, 2023 and October 25, 2026 — the level has ranged from a low of 45.0% (May 5, 2026) to a high of 102.3% (August 20, 2026). On average the reservoir is fullest around September and at its lowest around May.
The dam at Upper Coliban was completed in 1903. It is operated by BOM primarily for water supply. It lies within the Coliban river Basin basin at 37.290°S, 144.401°E.
Key facts
- Current fill level
- 100.2% of total capacity
- Water stored
- 37.83 hm³
- Total capacity
- 37.8 hm³
- 7-day change
- ▲ 0.2 pp
- Year-on-year
- ▲ 38.3 pp
- Primary use
- Water supply
- River
- Coliban river
- River basin
- Coliban river Basin
- Year completed
- 1903
- Operator
- BOM
- Coordinates
- 37.290°S, 144.401°E
- Last updated
- October 25, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 25 Oct 2026 | 100.2% | 37.83 |
| 24 Oct 2026 | 100.0% | 37.77 |
| 23 Oct 2026 | 99.9% | 37.75 |
| 22 Oct 2026 | 99.9% | 37.75 |
| 21 Oct 2026 | 100.0% | 37.77 |
| 20 Oct 2026 | 100.0% | 37.77 |
| 19 Oct 2026 | 100.0% | 37.77 |
| 18 Oct 2026 | 100.0% | 37.77 |
| 17 Oct 2026 | 100.0% | 37.77 |
| 16 Oct 2026 | 99.9% | 37.75 |
| 15 Oct 2026 | 99.9% | 37.73 |
| 14 Oct 2026 | 99.9% | 37.75 |