Reservoir · Tasmania · Australia · BOM Water Data Online
Lake King William
89.7% full
Capacity
539.3 hm³
Volume stored
484 hm³
River
Off-stream
Coordinates
42.230°S, 146.231°E
Last updated
2026-10-28
Current fill
89.7%vs 7 days ago
-1.0 pplosing
vs 1 year ago
-7.8 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
95%of normal
89.7% full on 2026-10-28, against an average of 94.3% for October across 4 years of readings (-4.6 points).
Rain over the last three months · 11 October 2026
Moderately dry
In the three months to 11 October 2026 the area around Lake King William had well below normal rain, a shortfall seen about one year in six. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −1.37). 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: 2026-10-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 42.230°S, 146.231°E · Open in Google Maps
About Lake King William
As of October 28, 2026, Lake King William is filled to 89.7% of its total capacity, holding 483.82 hm³ of water out of a maximum 539.3 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has fallen by 1.0 percentage points, and it is 7.8 points below its level on the same date a year earlier.
Across the readings we hold for Lake King William — 1095 data points between October 30, 2023 and October 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
- 89.7% of total capacity
- Water stored
- 483.82 hm³
- Total capacity
- 539.3 hm³
- 7-day change
- ▼ 1.0 pp
- Year-on-year
- ▼ 7.8 pp
- Primary use
- Water supply
- River
- Off-stream
- River basin
- Off-stream Basin
- Operator
- BOM
- Coordinates
- 42.230°S, 146.231°E
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 89.7% | 483.82 |
| 27 Oct 2026 | 89.8% | 484.49 |
| 26 Oct 2026 | 90.0% | 485.2 |
| 25 Oct 2026 | 90.1% | 486.1 |
| 24 Oct 2026 | 90.2% | 486.6 |
| 23 Oct 2026 | 90.4% | 487.44 |
| 22 Oct 2026 | 90.5% | 488.34 |
| 21 Oct 2026 | 90.7% | 489.21 |
| 20 Oct 2026 | 90.8% | 489.7 |
| 19 Oct 2026 | 90.9% | 490.2 |
| 18 Oct 2026 | 91.0% | 490.61 |
| 17 Oct 2026 | 90.9% | 490.4 |