Reservoir · Tasmania · Australia · BOM Water Data Online
Cluny Lagoon
58.1% full
Capacity
4.9 hm³
Volume stored
3 hm³
River
Derwent River
Year completed
1967
Coordinates
42.512°S, 146.676°E
Last updated
2026-10-25
Current fill
58.1%vs 7 days ago
-1.7 pplosing
vs 1 year ago
-3.0 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
97%of normal
58.1% full on 2026-10-25, against an average of 60.0% for October across 4 years of readings (-1.9 points).
Rain over the last three months · 11 October 2026
Moderately dry
In the three months to 11 October 2026 the area around Cluny Lagoon had well below normal rain, a shortfall seen about one year in six. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −1.45). 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: 2026-10-25.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 42.512°S, 146.676°E · Open in Google Maps
About Cluny Lagoon
As of October 25, 2026, Cluny Lagoon is filled to 58.1% of its total capacity, holding 2.83 hm³ of water out of a maximum 4.9 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 1.7 percentage points, and it is 3.0 points below its level on the same date a year earlier.
Across the readings we hold for Cluny Lagoon — 1094 data points between October 28, 2023 and October 25, 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
- 58.1% of total capacity
- Water stored
- 2.83 hm³
- Total capacity
- 4.9 hm³
- 7-day change
- ▼ 1.7 pp
- Year-on-year
- ▼ 3.0 pp
- 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
- October 25, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 25 Oct 2026 | 58.1% | 2.83 |
| 24 Oct 2026 | 58.4% | 2.85 |
| 23 Oct 2026 | 59.6% | 2.91 |
| 22 Oct 2026 | 59.8% | 2.92 |
| 21 Oct 2026 | 59.7% | 2.91 |
| 20 Oct 2026 | 58.9% | 2.88 |
| 19 Oct 2026 | 58.5% | 2.85 |
| 18 Oct 2026 | 59.8% | 2.92 |
| 17 Oct 2026 | 60.2% | 2.94 |
| 16 Oct 2026 | 58.4% | 2.85 |
| 15 Oct 2026 | 53.7% | 2.62 |
| 14 Oct 2026 | 58.3% | 2.84 |