Reservoir · Tasmania · Australia · BOM Water Data Online
Lake Pieman
11.7% full
Capacity
300.2 hm³
Volume stored
35 hm³
Year completed
1986
Coordinates
41.785°S, 145.214°E
Last updated
2026-10-25
Current fill
11.7%vs 7 days ago
-7.4 pplosing
vs 1 year ago
-28.2 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
39%of normal
11.7% full on 2026-10-25, against an average of 29.7% for October across 4 years of readings (-18.0 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Lake Pieman had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −0.99). 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. 41.785°S, 145.214°E · Open in Google Maps
About Lake Pieman
As of October 25, 2026, Lake Pieman is filled to 11.7% of its total capacity, holding 35.09 hm³ of water out of a maximum 300.2 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has fallen by 7.4 percentage points, and it is 28.2 points below its level on the same date a year earlier.
Across the readings we hold for Lake Pieman — 1094 data points between October 28, 2023 and October 25, 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. It is at 41.785°S, 145.214°E.
Key facts
- Current fill level
- 11.7% of total capacity
- Water stored
- 35.09 hm³
- Total capacity
- 300.2 hm³
- 7-day change
- ▼ 7.4 pp
- Year-on-year
- ▼ 28.2 pp
- Primary use
- Water supply
- Year completed
- 1986
- Operator
- BOM
- Coordinates
- 41.785°S, 145.214°E
- Last updated
- October 25, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 25 Oct 2026 | 11.7% | 35.09 |
| 24 Oct 2026 | 11.8% | 35.46 |
| 23 Oct 2026 | 13.4% | 40.23 |
| 22 Oct 2026 | 14.0% | 42.1 |
| 21 Oct 2026 | 16.3% | 49 |
| 20 Oct 2026 | 19.0% | 57.12 |
| 19 Oct 2026 | 20.5% | 61.47 |
| 18 Oct 2026 | 19.1% | 57.29 |
| 17 Oct 2026 | 16.1% | 48.38 |
| 16 Oct 2026 | 15.4% | 46.12 |
| 15 Oct 2026 | 14.5% | 43.47 |
| 14 Oct 2026 | 16.5% | 49.57 |