Reservoir · Tasmania · Australia · BOM Water Data Online
Arthurs Lake
54.8% full
Capacity
511.4 hm³
Volume stored
280 hm³
River
Upper Lake River
Year completed
1966
Coordinates
41.975°S, 146.951°E
Last updated
2026-09-07
Current fill
54.8%vs 7 days ago
+0.3%gaining
vs 1 year ago
-2.2%year-over-year
7-day trend
→stable
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. -41.975, 146.951 · Open in Google Maps
About Arthurs Lake
As of September 7, 2026, Arthurs Lake is filled to 54.8% of its total capacity, holding roughly 280 hm³ of water out of a maximum 511 hm³. At this level the reservoir is within its normal operating range. Of that total, about 429 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.3 pts), and it is 2.2 points below its level on the same date a year earlier.
Across the readings we hold for Arthurs Lake — 1093 data points between September 11, 2023 and September 7, 2026 — the level has ranged from a low of 44.5% (May 24, 2026) to a high of 67.3% (September 24, 2023). On average the reservoir is fullest around October 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
- 54.8%
- Water stored
- 280 hm³
- Total capacity
- 511 hm³
- Usable capacity
- 429 hm³
- 7-day change
- ▲ 0.3 pts
- Year-on-year
- ▼ 2.2 pts
- 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
- September 7, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 7 Sep 2026 | 54.8% | 280 |
| 6 Sep 2026 | 54.8% | 280 |
| 5 Sep 2026 | 54.7% | 280 |
| 4 Sep 2026 | 54.6% | 279 |
| 3 Sep 2026 | 54.5% | 279 |
| 2 Sep 2026 | 54.5% | 279 |
| 1 Sep 2026 | 54.5% | 279 |
| 31 Aug 2026 | 54.5% | 279 |
| 30 Aug 2026 | 54.5% | 279 |
| 29 Aug 2026 | 54.5% | 279 |
| 28 Aug 2026 | 54.5% | 279 |
| 27 Aug 2026 | 54.5% | 279 |