Reservoir · Victoria · Australia · Melbourne Water
Thomson
69.1% full
Capacity
1,068 hm³
Volume stored
738 hm³
River
Thomson River
Year completed
1984
Coordinates
37.780°S, 146.364°E
Last updated
2026-10-29
Current fill
69.1%vs 7 days ago
+0.1 ppgaining
vs 1 year ago
-5.8 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
86%of normal
69.1% full on 2026-10-29, against an average of 80.8% for October across 4 years of readings (-11.7 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Thomson 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 −0.33). Rain, not storage. Australia drought figures →
Data source: Melbourne Water daily storage — reference capacity and stored volume. Earlier daily volumes in the chart are Bureau of Meteorology readings, recomputed against that capacity. Last reading: 2026-10-29.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 37.780°S, 146.364°E · Open in Google Maps
About Thomson
As of October 29, 2026, Thomson is filled to 69.1% of its total capacity, holding 738.406 hm³ of water out of a maximum 1,068 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (+0.1 pp), and it is 5.8 points below its level on the same date a year earlier.
Across the readings we hold for Thomson — 1062 data points between October 29, 2023 and October 29, 2026 — the level has ranged from a low of 63.8% (June 30, 2026) to a high of 100.3% (January 15, 2024). On average the reservoir is fullest around November and at its lowest around July.
The dam at Thomson was completed in 1984. It is operated by Melbourne Water primarily for water supply. It lies within the Thomson River Basin basin at 37.780°S, 146.364°E.
Key facts
- Current fill level
- 69.1% of total capacity
- Water stored
- 738.406 hm³
- Total capacity
- 1,068 hm³
- 7-day change
- ▲ 0.1 pp
- Year-on-year
- ▼ 5.8 pp
- Primary use
- Water supply
- River
- Thomson River
- River basin
- Thomson River Basin
- Year completed
- 1984
- Operator
- Melbourne Water
- Coordinates
- 37.780°S, 146.364°E
- Last updated
- October 29, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 29 Oct 2026 | 69.1% | 738.406 |
| 28 Oct 2026 | 69.1% | 738.266 |
| 27 Oct 2026 | 69.1% | 738.073 |
| 26 Oct 2026 | 69.1% | 737.811 |
| 25 Oct 2026 | 69.0% | 736.97 |
| 24 Oct 2026 | 69.0% | 736.62 |
| 23 Oct 2026 | 69.0% | 736.602 |
| 22 Oct 2026 | 69.0% | 736.42 |
| 21 Oct 2026 | 68.9% | 736.24 |
| 20 Oct 2026 | 68.9% | 736.09 |
| 19 Oct 2026 | 68.9% | 735.85 |
| 18 Oct 2026 | 68.9% | 735.62 |