Reservoir · Tasmania · Australia · BOM Water Data Online
Lake King William
83.2% full
Capacity
539.3 hm³
Volume stored
449 hm³
River
Off-stream
Coordinates
42.230°S, 146.231°E
Last updated
2026-07-28
Current fill
83.2%vs 7 days ago
+1.1%gaining
vs 1 year ago
+13.2%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: 2026-07-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -42.230, 146.231 · Open in Google Maps
About Lake King William
As of July 28, 2026, Lake King William is filled to 83.2% of its total capacity, holding roughly 449 hm³ of water out of a maximum 539 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+1.1 pts), and it is 13.2 points above its level on the same date a year earlier.
Across the readings we hold for Lake King William — 1095 data points between July 30, 2023 and July 28, 2026 — the level has ranged from a low of 23.7% (June 26, 2024) to a high of 98.7% (November 14, 2025). On average the reservoir is fullest around October and at its lowest around June.
It is operated by BOM primarily for water supply. It lies within the Off-stream Basin basin at 42.230°S, 146.231°E.
Key facts
- Current fill level
- 83.2%
- Water stored
- 449 hm³
- Total capacity
- 539 hm³
- 7-day change
- ▲ 1.1 pts
- Year-on-year
- ▲ 13.2 pts
- Primary use
- Water supply
- River
- Off-stream
- River basin
- Off-stream Basin
- Operator
- BOM
- Coordinates
- 42.230°S, 146.231°E
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 83.2% | 449 |
| 27 Jul 2026 | 82.1% | 443 |
| 26 Jul 2026 | 80.7% | 435 |
| 25 Jul 2026 | 78.9% | 426 |
| 24 Jul 2026 | 77.0% | 415 |
| 23 Jul 2026 | 76.2% | 411 |
| 22 Jul 2026 | 75.8% | 409 |
| 21 Jul 2026 | 75.6% | 408 |
| 20 Jul 2026 | 75.5% | 407 |
| 19 Jul 2026 | 75.4% | 407 |
| 18 Jul 2026 | 75.1% | 405 |
| 17 Jul 2026 | 74.8% | 403 |
Frequently asked questions
What is the current water level of Lake King William?
As of July 28, 2026, Lake King William is at 83.2% of its capacity, holding approximately 449 hm³ of water, according to BOM data.
Is Lake King William reservoir full?
No. As of July 28, 2026, Lake King William is high at 83.2% of its capacity, so it is not full.
Is the water level at Lake King William rising or falling?
The level at Lake King William has been broadly stable over the latest week on record (+1.1 points).
How much water can Lake King William hold?
Lake King William has a total capacity of 539 hm³.
Where is Lake King William reservoir located?
Lake King William is located in Tasmania, Australia, within the Off-stream Basin basin (coordinates 42.230°S, 146.231°E).
What is Lake King William used for?
Lake King William is used primarily for water supply, and is managed by BOM.