Reservoir · Tasmania · Australia · BOM Water Data Online
Arthurs Lake
51.7% full
Capacity
511.4 hm³
Volume stored
264 hm³
River
Upper Lake River
Year completed
1966
Coordinates
41.975°S, 146.951°E
Last updated
2026-10-26
Current fill
51.7%vs 7 days ago
-0.4 pplosing
vs 1 year ago
-8.6 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
88%of normal
51.7% full on 2026-10-26, against an average of 58.7% for October across 4 years of readings (-7.0 points).
Rain over the last three months · 11 October 2026
Extremely dry
In the three months to 11 October 2026 the area around Arthurs Lake had extremely little rain for the season, a shortfall seen about one year in forty. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −2.13). 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: 2026-10-26.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.975°S, 146.951°E · Open in Google Maps
About Arthurs Lake
As of October 26, 2026, Arthurs Lake is filled to 51.7% of its total capacity, holding 264.15 hm³ of water out of a maximum 511.4 hm³. At this level the reservoir is within its normal operating range. Of that total, 429.4 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (-0.4 pp), and it is 8.6 points below its level on the same date a year earlier.
Across the readings we hold for Arthurs Lake — 1095 data points between October 28, 2023 and October 26, 2026 — the level has ranged from a low of 44.5% (May 24, 2026) to a high of 66.9% (October 28, 2023). On average the reservoir is fullest around November and at its lowest around May.
The dam at Arthurs Lake was completed in 1966. It is operated by BOM primarily for water supply. It lies within the Upper Lake River Basin basin at 41.975°S, 146.951°E.
Key facts
- Current fill level
- 51.7% of total capacity
- Water stored
- 264.15 hm³
- Total capacity
- 511.4 hm³
- Usable capacity
- 429.4 hm³
- 7-day change
- ▼ 0.4 pp
- Year-on-year
- ▼ 8.6 pp
- Primary use
- Water supply
- River
- Upper Lake River
- River basin
- Upper Lake River Basin
- Year completed
- 1966
- Operator
- BOM
- Coordinates
- 41.975°S, 146.951°E
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 51.7% | 264.15 |
| 25 Oct 2026 | 51.7% | 264.6 |
| 24 Oct 2026 | 51.7% | 264.27 |
| 23 Oct 2026 | 51.8% | 264.73 |
| 22 Oct 2026 | 51.9% | 265.32 |
| 21 Oct 2026 | 52.0% | 265.71 |
| 20 Oct 2026 | 52.0% | 266.08 |
| 19 Oct 2026 | 52.1% | 266.61 |
| 18 Oct 2026 | 52.2% | 267.12 |
| 17 Oct 2026 | 52.3% | 267.57 |
| 16 Oct 2026 | 52.4% | 268.2 |
| 15 Oct 2026 | 52.5% | 268.49 |