Reservoir · New South Wales · Australia · BOM Water Data Online
Hay Weir
56.8% full
Capacity
13.3 hm³
Volume stored
8 hm³
Coordinates
34.522°S, 144.713°E
Last updated
2026-10-11
Current fill
56.8%vs 7 days ago
+20.0%gaining
vs 1 year ago
+6.8%year-over-year
7-day trend
↑rising
Drought context
Storage vs October average
81%of normal
56.8% full on 2026-10-11, against an average of 70.5% for October across 4 years of readings (-13.7 points).
Rain over the last three months · 21 September 2026
Near normal
In the three months to 21 September 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 +0.42). 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: 2026-10-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -34.522, 144.713 · Open in Google Maps
About Hay Weir
As of October 11, 2026, Hay Weir is filled to 56.8% of its total capacity, holding roughly 8 hm³ of water out of a maximum 13 hm³. At this level the reservoir is within its normal operating range. Of that total, about 12 hm³ is usable (live) storage.
Over the most recent week on record the fill level has risen by 20.0 percentage points, and it is 6.8 points above its level on the same date a year earlier.
Across the readings we hold for Hay Weir — 1095 data points between October 13, 2023 and October 11, 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.
Key facts
- Current fill level
- 56.8%
- Water stored
- 8 hm³
- Total capacity
- 13 hm³
- Usable capacity
- 12 hm³
- 7-day change
- ▲ 20.0 pts
- Year-on-year
- ▲ 6.8 pts
- Primary use
- Water supply
- Operator
- BOM
- Coordinates
- 34.522°S, 144.713°E
- Last updated
- October 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Oct 2026 | 56.8% | 8 |
| 10 Oct 2026 | 57.6% | 8 |
| 9 Oct 2026 | 56.5% | 8 |
| 8 Oct 2026 | 54.5% | 7 |
| 7 Oct 2026 | 50.2% | 7 |
| 6 Oct 2026 | 45.5% | 6 |
| 5 Oct 2026 | 40.4% | 5 |
| 4 Oct 2026 | 36.8% | 5 |
| 3 Oct 2026 | 33.1% | 4 |
| 2 Oct 2026 | 31.1% | 4 |
| 1 Oct 2026 | 30.9% | 4 |
| 30 Sep 2026 | 34.0% | 5 |