Reservoir · Queensland · Australia · BOM Water Data Online
Marian Weir
101.6% full
Capacity
4 hm³
Volume stored
4 hm³
Year completed
1952
Coordinates
21.138°S, 148.910°E
Last updated
2026-10-26
Current fill
101.6%vs 7 days ago
-2.1 pplosing
vs 1 year ago
+1.1 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
100%of normal
101.6% full on 2026-10-26, against an average of 101.1% for October across 4 years of readings (+0.5 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Marian Weir had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index +0.32). 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. 21.138°S, 148.910°E · Open in Google Maps
About Marian Weir
As of October 26, 2026, Marian Weir is filled to 101.6% of its total capacity, holding 4.05 hm³ of water out of a maximum 4 hm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has fallen by 2.1 percentage points, and it is 1.1 points above its level on the same date a year earlier.
Across the readings we hold for Marian Weir — 1090 data points between October 28, 2023 and October 26, 2026 — the level has ranged from a low of 100.1% (October 4, 2025) to a high of 148.4% (February 7, 2025). On average the reservoir is fullest around February and at its lowest around September.
The dam at Marian Weir was completed in 1952. It is operated by BOM primarily for water supply. It is at 21.138°S, 148.910°E.
Key facts
- Current fill level
- 101.6% of total capacity
- Water stored
- 4.05 hm³
- Total capacity
- 4 hm³
- 7-day change
- ▼ 2.1 pp
- Year-on-year
- ▲ 1.1 pp
- Primary use
- Water supply
- Year completed
- 1952
- Operator
- BOM
- Coordinates
- 21.138°S, 148.910°E
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 101.6% | 4.05 |
| 25 Oct 2026 | 103.0% | 4.1 |
| 24 Oct 2026 | 107.3% | 4.28 |
| 23 Oct 2026 | 101.0% | 4.02 |
| 22 Oct 2026 | 101.2% | 4.03 |
| 21 Oct 2026 | 101.7% | 4.05 |
| 20 Oct 2026 | 102.6% | 4.09 |
| 19 Oct 2026 | 103.7% | 4.13 |
| 18 Oct 2026 | 102.4% | 4.08 |
| 17 Oct 2026 | 101.7% | 4.05 |
| 16 Oct 2026 | 101.5% | 4.04 |
| 15 Oct 2026 | 101.0% | 4.03 |