Reservoir · Victoria · Australia · BOM Water Data Online
Merrimu Reservoir
93.9% full
Capacity
32.5 hm³
Volume stored
31 hm³
River
Pyrites Creek
Year completed
1986
Coordinates
37.620°S, 144.490°E
Last updated
2026-10-26
Current fill
93.9%vs 7 days ago
+0.8 ppgaining
vs 1 year ago
+27.1 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
117%of normal
93.9% full on 2026-10-26, against an average of 80.4% for October across 4 years of readings (+13.5 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Merrimu Reservoir 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 +0.23). 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: 2026-10-26.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 37.620°S, 144.490°E · Open in Google Maps
About Merrimu Reservoir
As of October 26, 2026, Merrimu Reservoir is filled to 93.9% of its total capacity, holding 30.53 hm³ of water out of a maximum 32.5 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.8 pp), and it is 27.1 points above its level on the same date a year earlier.
Across the readings we hold for Merrimu Reservoir — 1075 data points between October 28, 2023 and October 26, 2026 — the level has ranged from a low of 56.9% (June 4, 2026) to a high of 95.7% (January 12, 2024). On average the reservoir is fullest around October and at its lowest around June.
The dam at Merrimu Reservoir was completed in 1986. It is operated by BOM primarily for water supply. It lies within the Pyrites Creek Basin basin at 37.620°S, 144.490°E.
Key facts
- Current fill level
- 93.9% of total capacity
- Water stored
- 30.53 hm³
- Total capacity
- 32.5 hm³
- 7-day change
- ▲ 0.8 pp
- Year-on-year
- ▲ 27.1 pp
- Primary use
- Water supply
- River
- Pyrites Creek
- River basin
- Pyrites Creek Basin
- Year completed
- 1986
- Operator
- BOM
- Coordinates
- 37.620°S, 144.490°E
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 93.9% | 30.53 |
| 25 Oct 2026 | 93.1% | 30.26 |
| 24 Oct 2026 | 92.8% | 30.16 |
| 23 Oct 2026 | 92.8% | 30.17 |
| 22 Oct 2026 | 92.9% | 30.19 |
| 21 Oct 2026 | 92.9% | 30.21 |
| 20 Oct 2026 | 93.0% | 30.23 |
| 19 Oct 2026 | 93.1% | 30.26 |
| 18 Oct 2026 | 93.1% | 30.28 |
| 17 Oct 2026 | 93.2% | 30.29 |
| 16 Oct 2026 | 93.2% | 30.3 |
| 15 Oct 2026 | 93.2% | 30.3 |