Reservoir · Tasmania · Australia · BOM Water Data Online
Shannon Lagoon
66.1% full
Capacity
1.7 hm³
Volume stored
1 hm³
Coordinates
41.993°S, 146.739°E
Last updated
2026-07-28
Current fill
66.1%vs 7 days ago
+4.2%gaining
vs 1 year ago
+14.5%year-over-year
7-day trend
↑rising
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. -41.993, 146.739 · Open in Google Maps
About Shannon Lagoon
As of July 28, 2026, Shannon Lagoon is filled to 66.1% of its total capacity, holding roughly 1 hm³ of water out of a maximum 2 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has risen by 4.2 percentage points, and it is 14.5 points above its level on the same date a year earlier.
Across the readings we hold for Shannon Lagoon — 1095 data points between July 30, 2023 and July 28, 2026 — the level has ranged from a low of 23.1% (June 13, 2025) to a high of 103.2% (September 2, 2024). On average the reservoir is fullest around September and at its lowest around June.
It is operated by BOM primarily for water supply.
Key facts
- Current fill level
- 66.1%
- Water stored
- 1 hm³
- Total capacity
- 2 hm³
- 7-day change
- ▲ 4.2 pts
- Year-on-year
- ▲ 14.5 pts
- Primary use
- Water supply
- Operator
- BOM
- Coordinates
- 41.993°S, 146.739°E
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 66.1% | 1 |
| 27 Jul 2026 | 61.9% | 1 |
| 26 Jul 2026 | 57.2% | 1 |
| 25 Jul 2026 | 53.5% | 1 |
| 24 Jul 2026 | 51.0% | 1 |
| 23 Jul 2026 | 49.8% | 1 |
| 22 Jul 2026 | 51.3% | 1 |
| 21 Jul 2026 | 52.2% | 1 |
| 20 Jul 2026 | 52.8% | 1 |
| 19 Jul 2026 | 51.0% | 1 |
| 18 Jul 2026 | 50.9% | 1 |
| 17 Jul 2026 | 51.0% | 1 |
Frequently asked questions
What is the current water level of Shannon Lagoon?
As of July 28, 2026, Shannon Lagoon is at 66.1% of its capacity, holding approximately 1 hm³ of water, according to BOM data.
Is Shannon Lagoon reservoir full?
No. As of July 28, 2026, Shannon Lagoon is within its normal operating range at 66.1% of its capacity, so it is not full.
Is the water level at Shannon Lagoon rising or falling?
The level at Shannon Lagoon is rising — it gained 4.2 percentage points over the latest week on record.
How much water can Shannon Lagoon hold?
Shannon Lagoon has a total capacity of 2 hm³.
Where is Shannon Lagoon reservoir located?
Shannon Lagoon is located in Tasmania, Australia (coordinates 41.993°S, 146.739°E).
What is Shannon Lagoon used for?
Shannon Lagoon is used primarily for water supply, and is managed by BOM.