Reservoir · Tasmania · Australia · BOM Water Data Online
Arthurs Lake
52.3% full
Capacity
511.4 hm³
Volume stored
267 hm³
River
Upper Lake River
Year completed
1966
Coordinates
41.975°S, 146.951°E
Last updated
2026-07-28
Current fill
52.3%vs 7 days ago
+0.1%gaining
vs 1 year ago
+6.4%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: 2026-07-28.
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 July 28, 2026, Arthurs Lake is filled to 52.3% of its total capacity, holding roughly 267 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 (+0.1 pts), and it is 6.4 points above its level on the same date a year earlier.
Across the readings we hold for Arthurs Lake — 1095 data points between July 30, 2023 and July 28, 2026 — the level has ranged from a low of 44.5% (May 24, 2026) to a high of 67.7% (August 7, 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
- 52.3%
- Water stored
- 267 hm³
- Total capacity
- 511 hm³
- Usable capacity
- 429 hm³
- 7-day change
- ▲ 0.1 pts
- Year-on-year
- ▲ 6.4 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
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 52.3% | 267 |
| 27 Jul 2026 | 52.2% | 267 |
| 26 Jul 2026 | 52.1% | 266 |
| 25 Jul 2026 | 52.0% | 266 |
| 24 Jul 2026 | 51.9% | 266 |
| 23 Jul 2026 | 51.9% | 265 |
| 22 Jul 2026 | 51.8% | 265 |
| 21 Jul 2026 | 51.9% | 265 |
| 20 Jul 2026 | 51.9% | 265 |
| 19 Jul 2026 | 51.8% | 265 |
| 18 Jul 2026 | 51.8% | 265 |
| 17 Jul 2026 | 51.7% | 264 |
Frequently asked questions
What is the current water level of Arthurs Lake?
As of July 28, 2026, Arthurs Lake is at 52.3% of its capacity, holding approximately 267 hm³ of water, according to BOM data.
Is Arthurs Lake reservoir full?
No. As of July 28, 2026, Arthurs Lake is within its normal operating range at 52.3% of its capacity, so it is not full.
Is the water level at Arthurs Lake rising or falling?
The level at Arthurs Lake has been broadly stable over the latest week on record (+0.1 points).
How much water can Arthurs Lake hold?
Arthurs Lake has a total capacity of 511 hm³, of which about 429 hm³ is usable storage.
Where is Arthurs Lake reservoir located?
Arthurs Lake is located in Tasmania, Australia, within the Upper Lake River Basin basin (coordinates 41.975°S, 146.951°E).
When was Arthurs Lake dam built?
The dam at Arthurs Lake was completed in 1966.
What is Arthurs Lake used for?
Arthurs Lake is used primarily for water supply, and is managed by BOM.