Reservoir · New South Wales · Australia · BOM Water Data Online
Hay Weir
61.2% full
Capacity
13.3 hm³
Volume stored
8 hm³
Coordinates
34.522°S, 144.713°E
Last updated
2026-10-26
Current fill
61.2%vs 7 days ago
+10.5 ppgaining
vs 1 year ago
-24.5 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
92%of normal
61.2% full on 2026-10-26, against an average of 66.4% for October across 4 years of readings (-5.2 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Hay 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 +0.13). 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. 34.522°S, 144.713°E · Open in Google Maps
About Hay Weir
As of October 26, 2026, Hay Weir is filled to 61.2% of its total capacity, holding 8.14 hm³ of water out of a maximum 13.3 hm³. At this level the reservoir is within its normal operating range. Of that total, 12.3 hm³ is usable (live) storage.
Over the most recent week on record the fill level has risen by 10.5 percentage points, and it is 24.5 points below its level on the same date a year earlier.
Across the readings we hold for Hay Weir — 1095 data points between October 28, 2023 and October 26, 2026 — the level has ranged from a low of 30.6% (July 22, 2026) to a high of 86.8% (October 1, 2024). On average the reservoir is fullest around November and at its lowest around February.
It is operated by BOM primarily for water supply. It is at 34.522°S, 144.713°E.
Key facts
- Current fill level
- 61.2% of total capacity
- Water stored
- 8.14 hm³
- Total capacity
- 13.3 hm³
- Usable capacity
- 12.3 hm³
- 7-day change
- ▲ 10.5 pp
- Year-on-year
- ▼ 24.5 pp
- Primary use
- Water supply
- Operator
- BOM
- Coordinates
- 34.522°S, 144.713°E
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 61.2% | 8.14 |
| 25 Oct 2026 | 60.4% | 8.03 |
| 24 Oct 2026 | 58.2% | 7.74 |
| 23 Oct 2026 | 55.6% | 7.39 |
| 22 Oct 2026 | 53.1% | 7.06 |
| 21 Oct 2026 | 50.1% | 6.66 |
| 20 Oct 2026 | 48.7% | 6.47 |
| 19 Oct 2026 | 50.7% | 6.75 |
| 18 Oct 2026 | 54.2% | 7.21 |
| 17 Oct 2026 | 56.3% | 7.49 |
| 16 Oct 2026 | 57.6% | 7.66 |
| 15 Oct 2026 | 57.8% | 7.69 |