Reservoir · Tasmania · Australia · BOM Water Data Online
Cluny Lagoon
58.3% full
Capacity
4.9 hm³
Volume stored
3 hm³
River
Derwent River
Year completed
1967
Coordinates
42.512°S, 146.676°E
Last updated
2026-09-07
Current fill
58.3%vs 7 days ago
-0.2%losing
vs 1 year ago
-0.1%year-over-year
7-day trend
→stable
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. -42.512, 146.676 · Open in Google Maps
About Cluny Lagoon
As of September 7, 2026, Cluny Lagoon is filled to 58.3% of its total capacity, holding roughly 3 hm³ of water out of a maximum 5 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 (-0.2 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Cluny Lagoon — 1094 data points between September 10, 2023 and September 7, 2026 — the level has ranged from a low of 7.7% (December 6, 2023) to a high of 106.1% (September 2, 2024). On average the reservoir is fullest around September and at its lowest around February.
The dam at Cluny Lagoon was completed in 1967. It is operated by BOM primarily for water supply. It lies within the Derwent River Basin basin at 42.512°S, 146.676°E.
Key facts
- Current fill level
- 58.3%
- Water stored
- 3 hm³
- Total capacity
- 5 hm³
- 7-day change
- ▼ 0.2 pts
- Year-on-year
- ▼ 0.1 pts
- Primary use
- Water supply
- River
- Derwent River
- River basin
- Derwent River Basin
- Year completed
- 1967
- Operator
- BOM
- Coordinates
- 42.512°S, 146.676°E
- Last updated
- September 7, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 7 Sep 2026 | 58.3% | 3 |
| 6 Sep 2026 | 59.1% | 3 |
| 5 Sep 2026 | 57.9% | 3 |
| 4 Sep 2026 | 59.2% | 3 |
| 3 Sep 2026 | 56.7% | 3 |
| 2 Sep 2026 | 56.7% | 3 |
| 1 Sep 2026 | 57.9% | 3 |
| 31 Aug 2026 | 58.5% | 3 |
| 30 Aug 2026 | 59.6% | 3 |
| 29 Aug 2026 | 58.8% | 3 |
| 28 Aug 2026 | 58.6% | 3 |
| 27 Aug 2026 | 58.5% | 3 |