Reservoir · Tasmania · Australia · BOM Water Data Online
Lake Pieman
22.5% full
Capacity
300.2 hm³
Volume stored
68 hm³
Year completed
1986
Coordinates
41.785°S, 145.214°E
Last updated
2026-09-07
Current fill
22.5%vs 7 days ago
+14.1%gaining
vs 1 year ago
-14.9%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. -41.785, 145.214 · Open in Google Maps
About Lake Pieman
As of September 7, 2026, Lake Pieman is filled to 22.5% of its total capacity, holding roughly 68 hm³ of water out of a maximum 300 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has risen by 14.1 percentage points, and it is 14.9 points below its level on the same date a year earlier.
Across the readings we hold for Lake Pieman — 1093 data points between September 11, 2023 and September 7, 2026 — the level has ranged from a low of 2.9% (June 10, 2026) to a high of 54.3% (September 2, 2024). On average the reservoir is fullest around September and at its lowest around June.
The dam at Lake Pieman was completed in 1986. It is operated by BOM primarily for water supply.
Key facts
- Current fill level
- 22.5%
- Water stored
- 68 hm³
- Total capacity
- 300 hm³
- 7-day change
- ▲ 14.1 pts
- Year-on-year
- ▼ 14.9 pts
- Primary use
- Water supply
- Year completed
- 1986
- Operator
- BOM
- Coordinates
- 41.785°S, 145.214°E
- Last updated
- September 7, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 7 Sep 2026 | 22.5% | 67 |
| 6 Sep 2026 | 20.8% | 62 |
| 5 Sep 2026 | 16.7% | 50 |
| 4 Sep 2026 | 13.3% | 40 |
| 3 Sep 2026 | 10.2% | 31 |
| 2 Sep 2026 | 7.0% | 21 |
| 1 Sep 2026 | 6.9% | 21 |
| 31 Aug 2026 | 8.4% | 25 |
| 30 Aug 2026 | 12.2% | 37 |
| 29 Aug 2026 | 13.8% | 41 |
| 28 Aug 2026 | 15.3% | 46 |
| 27 Aug 2026 | 16.6% | 50 |