Reservoir · Tasmania · Australia · BOM Water Data Online
Cluny Lagoon
65.6% full
Capacity
4.9 hm³
Volume stored
3 hm³
River
Derwent River
Year completed
1967
Coordinates
42.512°S, 146.676°E
Last updated
2026-07-28
Current fill
65.6%vs 7 days ago
+3.2%gaining
vs 1 year ago
+5.8%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: 2026-07-28.
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 July 28, 2026, Cluny Lagoon is filled to 65.6% 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 risen by 3.2 percentage points, and it is 5.8 points above its level on the same date a year earlier.
Across the readings we hold for Cluny Lagoon — 1095 data points between July 30, 2023 and July 28, 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
- 65.6%
- Water stored
- 3 hm³
- Total capacity
- 5 hm³
- 7-day change
- ▲ 3.2 pts
- Year-on-year
- ▲ 5.8 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
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 65.6% | 3 |
| 27 Jul 2026 | 62.4% | 3 |
| 26 Jul 2026 | 63.0% | 3 |
| 25 Jul 2026 | 65.3% | 3 |
| 24 Jul 2026 | 57.1% | 3 |
| 23 Jul 2026 | 59.1% | 3 |
| 22 Jul 2026 | 59.0% | 3 |
| 21 Jul 2026 | 57.6% | 3 |
| 20 Jul 2026 | 57.6% | 3 |
| 19 Jul 2026 | 57.5% | 3 |
| 18 Jul 2026 | 59.5% | 3 |
| 17 Jul 2026 | 57.3% | 3 |
Frequently asked questions
What is the current water level of Cluny Lagoon?
As of July 28, 2026, Cluny Lagoon is at 65.6% of its capacity, holding approximately 3 hm³ of water, according to BOM data.
Is Cluny Lagoon reservoir full?
No. As of July 28, 2026, Cluny Lagoon is within its normal operating range at 65.6% of its capacity, so it is not full.
Is the water level at Cluny Lagoon rising or falling?
The level at Cluny Lagoon is rising — it gained 3.2 percentage points over the latest week on record.
How much water can Cluny Lagoon hold?
Cluny Lagoon has a total capacity of 5 hm³.
Where is Cluny Lagoon reservoir located?
Cluny Lagoon is located in Tasmania, Australia, within the Derwent River Basin basin (coordinates 42.512°S, 146.676°E).
When was Cluny Lagoon dam built?
The dam at Cluny Lagoon was completed in 1967.
What is Cluny Lagoon used for?
Cluny Lagoon is used primarily for water supply, and is managed by BOM.