Reservoir · Tasmania · Australia · BOM Water Data Online
Lake Murchison
47.4% full
Capacity
96.9 hm³
Volume stored
46 hm³
River
Murchison River
Year completed
1982
Coordinates
41.863°S, 145.740°E
Last updated
2026-09-07
Current fill
47.4%vs 7 days ago
+27.6%gaining
vs 1 year ago
+2.3%year-over-year
7-day trend
↑rising
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: 2026-09-07.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -41.863, 145.740 · Open in Google Maps
About Lake Murchison
As of September 7, 2026, Lake Murchison is filled to 47.4% of its total capacity, holding roughly 46 hm³ of water out of a maximum 97 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has risen by 27.6 percentage points, and it is 2.3 points above its level on the same date a year earlier.
Across the readings we hold for Lake Murchison — 1093 data points between September 11, 2023 and September 7, 2026 — the level has ranged from a low of 6.0% (June 16, 2025) to a high of 75.4% (September 2, 2024). On average the reservoir is fullest around September and at its lowest around May.
The dam at Lake Murchison was completed in 1982. It is operated by BOM primarily for water supply. It lies within the Murchison River Basin basin at 41.863°S, 145.740°E.
Key facts
- Current fill level
- 47.4%
- Water stored
- 46 hm³
- Total capacity
- 97 hm³
- 7-day change
- ▲ 27.6 pts
- Year-on-year
- ▲ 2.3 pts
- Primary use
- Water supply
- River
- Murchison River
- River basin
- Murchison River Basin
- Year completed
- 1982
- Operator
- BOM
- Coordinates
- 41.863°S, 145.740°E
- Last updated
- September 7, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 7 Sep 2026 | 47.4% | 46 |
| 6 Sep 2026 | 49.1% | 48 |
| 5 Sep 2026 | 43.9% | 43 |
| 4 Sep 2026 | 39.3% | 38 |
| 3 Sep 2026 | 30.3% | 29 |
| 2 Sep 2026 | 22.4% | 22 |
| 1 Sep 2026 | 18.6% | 18 |
| 31 Aug 2026 | 19.8% | 19 |
| 30 Aug 2026 | 20.8% | 20 |
| 29 Aug 2026 | 22.8% | 22 |
| 28 Aug 2026 | 25.9% | 25 |
| 27 Aug 2026 | 28.2% | 27 |