Reservoir · Tasmania · Australia · BOM Water Data Online
Dee Lagoon
0.3% full
Capacity
41.9 hm³
Volume stored
0 hm³
River
Dee River
Year completed
1956
Coordinates
42.271°S, 146.605°E
Last updated
2026-10-26
Current fill
0.3%vs 7 days ago
0.0 ppstable
vs 1 year ago
-0.8 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
33%of normal
0.3% full on 2026-10-26, against an average of 0.9% for October across 4 years of readings (-0.6 points).
Rain over the last three months · 11 October 2026
Severely dry
In the three months to 11 October 2026 the area around Dee Lagoon had far less rain than normal, a shortfall seen about one year in fifteen. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −1.72). 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. 42.271°S, 146.605°E · Open in Google Maps
About Dee Lagoon
As of October 26, 2026, Dee Lagoon is filled to 0.3% of its total capacity, holding 0.12 hm³ of water out of a maximum 41.9 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (+0.0 pp), and it sits close to where it was a year earlier.
Across the readings we hold for Dee Lagoon — 1084 data points between October 28, 2023 and October 26, 2026 — the level has ranged from a low of 0.0% (December 6, 2023) to a high of 3.7% (January 8, 2024). On average the reservoir is fullest around March and at its lowest around November.
The dam at Dee Lagoon was completed in 1956. It is operated by BOM primarily for water supply. It lies within the Dee River Basin basin at 42.271°S, 146.605°E.
Key facts
- Current fill level
- 0.3% of total capacity
- Water stored
- 0.12 hm³
- Total capacity
- 41.9 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 0.8 pp
- Primary use
- Water supply
- River
- Dee River
- River basin
- Dee River Basin
- Year completed
- 1956
- Operator
- BOM
- Coordinates
- 42.271°S, 146.605°E
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 0.3% | 0.12 |
| 25 Oct 2026 | 0.3% | 0.11 |
| 24 Oct 2026 | 0.1% | 0.06 |
| 23 Oct 2026 | 0.1% | 0.04 |
| 22 Oct 2026 | 0.2% | 0.07 |
| 21 Oct 2026 | 0.2% | 0.1 |
| 20 Oct 2026 | 0.3% | 0.11 |
| 19 Oct 2026 | 0.3% | 0.14 |
| 18 Oct 2026 | 0.4% | 0.17 |
| 17 Oct 2026 | 0.5% | 0.19 |
| 16 Oct 2026 | 0.5% | 0.22 |
| 15 Oct 2026 | 0.6% | 0.25 |