Reservoir · Victoria · Australia · Melbourne Water
Yan Yean
74.8% full
Capacity
30.266 hm³
Volume stored
23 hm³
River
Off-stream
Year completed
1857
Coordinates
37.555°S, 145.138°E
Last updated
2026-10-28
Current fill
74.8%vs 7 days ago
+0.5 ppgaining
vs 1 year ago
+7.3 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
95%of normal
74.8% full on 2026-10-28, against an average of 78.7% for October across 4 years of readings (-3.9 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Yan Yean 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 +0.04). 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: 2026-10-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 37.555°S, 145.138°E · Open in Google Maps
About Yan Yean
As of October 28, 2026, Yan Yean is filled to 74.8% of its total capacity, holding 22.631 hm³ of water out of a maximum 30.266 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 (+0.5 pp), and it is 7.3 points above its level on the same date a year earlier.
Across the readings we hold for Yan Yean — 1071 data points between October 28, 2023 and October 28, 2026 — the level has ranged from a low of 57.4% (March 25, 2026) to a high of 98.0% (January 10, 2024). On average the reservoir is fullest around November and at its lowest around May.
The dam at Yan Yean was completed in 1857. It is operated by Melbourne Water primarily for water supply. It lies within the Off-stream Basin basin at 37.555°S, 145.138°E.
Key facts
- Current fill level
- 74.8% of total capacity
- Water stored
- 22.631 hm³
- Total capacity
- 30.266 hm³
- 7-day change
- ▲ 0.5 pp
- Year-on-year
- ▲ 7.3 pp
- Primary use
- Water supply
- River
- Off-stream
- River basin
- Off-stream Basin
- Year completed
- 1857
- Operator
- Melbourne Water
- Coordinates
- 37.555°S, 145.138°E
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 74.8% | 22.631 |
| 27 Oct 2026 | 74.8% | 22.631 |
| 26 Oct 2026 | 74.8% | 22.631 |
| 25 Oct 2026 | 74.3% | 22.484 |
| 24 Oct 2026 | 74.3% | 22.484 |
| 23 Oct 2026 | 74.3% | 22.484 |
| 22 Oct 2026 | 74.3% | 22.484 |
| 21 Oct 2026 | 74.3% | 22.48 |
| 20 Oct 2026 | 74.3% | 22.48 |
| 19 Oct 2026 | 74.3% | 22.49 |
| 18 Oct 2026 | 74.7% | 22.6 |
| 17 Oct 2026 | 74.8% | 22.63 |