Reservoir · New South Wales · Australia · BOM Water Data Online
Hay Weir
60.2% full
Capacity
13.3 hm³
Volume stored
8 hm³
Coordinates
34.522°S, 144.713°E
Last updated
2026-07-29
Current fill
60.2%vs 7 days ago
+5.5%gaining
vs 1 year ago
-25.5%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: 2026-07-29.
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 July 29, 2026, Hay Weir is filled to 60.2% 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 5.5 percentage points, and it is 25.5 points below its level on the same date a year earlier.
Across the readings we hold for Hay Weir — 1096 data points between July 30, 2023 and July 29, 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
- 60.2%
- Water stored
- 8 hm³
- Total capacity
- 13 hm³
- Usable capacity
- 12 hm³
- 7-day change
- ▲ 5.5 pts
- Year-on-year
- ▼ 25.5 pts
- Primary use
- Water supply
- Operator
- BOM
- Coordinates
- 34.522°S, 144.713°E
- Last updated
- July 29, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 29 Jul 2026 | 60.2% | 8 |
| 28 Jul 2026 | 54.7% | 7 |
| 27 Jul 2026 | 47.6% | 6 |
| 26 Jul 2026 | 42.5% | 6 |
| 25 Jul 2026 | 37.5% | 5 |
| 24 Jul 2026 | 32.1% | 4 |
| 23 Jul 2026 | 30.7% | 4 |
| 22 Jul 2026 | 30.6% | 4 |
| 21 Jul 2026 | 33.6% | 4 |
| 20 Jul 2026 | 38.4% | 5 |
| 19 Jul 2026 | 44.5% | 6 |
| 18 Jul 2026 | 49.3% | 7 |
Frequently asked questions
What is the current water level of Hay Weir?
As of July 29, 2026, Hay Weir is at 60.2% of its capacity, holding approximately 8 hm³ of water, according to BOM data.
Is Hay Weir reservoir full?
No. As of July 29, 2026, Hay Weir is within its normal operating range at 60.2% of its capacity, so it is not full.
Is the water level at Hay Weir rising or falling?
The level at Hay Weir is rising — it gained 5.5 percentage points over the latest week on record.
How much water can Hay Weir hold?
Hay Weir has a total capacity of 13 hm³, of which about 12 hm³ is usable storage.
Where is Hay Weir reservoir located?
Hay Weir is located in New South Wales, Australia (coordinates 34.522°S, 144.713°E).
What is Hay Weir used for?
Hay Weir is used primarily for water supply, and is managed by BOM.