Reservoir · New South Wales · Australia · BOM Water Data Online
Hay Weir
85.7% full
Capacity
13.3 hm³
Volume stored
11 hm³
Coordinates
34.522°S, 144.713°E
Last updated
2026-06-10
Current fill
85.7%vs 7 days ago
+0.2%gaining
vs 1 year ago
-0.1%year-over-year
7-day trend
→stable
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: 2026-06-10.
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 June 10, 2026, Hay Weir is filled to 85.7% of its total capacity, holding roughly 11 hm³ of water out of a maximum 13 hm³. At this level the reservoir is high. Of that total, about 12 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.2 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Hay Weir — 1095 data points between June 12, 2023 and June 10, 2026 — the level has ranged from a low of 33.9% (March 18, 2024) 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
- 85.7%
- Water stored
- 11 hm³
- Total capacity
- 13 hm³
- Usable capacity
- 12 hm³
- 7-day change
- ▲ 0.2 pts
- Year-on-year
- ▼ 0.1 pts
- Primary use
- Water supply
- Operator
- BOM
- Coordinates
- 34.522°S, 144.713°E
- Last updated
- June 10, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 10 Jun 2026 | 85.7% | 11 |
| 9 Jun 2026 | 85.5% | 11 |
| 8 Jun 2026 | 85.7% | 11 |
| 7 Jun 2026 | 85.9% | 11 |
| 6 Jun 2026 | 85.6% | 11 |
| 5 Jun 2026 | 86.0% | 11 |
| 4 Jun 2026 | 85.5% | 11 |
| 3 Jun 2026 | 85.5% | 11 |
| 2 Jun 2026 | 85.9% | 11 |
| 1 Jun 2026 | 85.6% | 11 |
| 31 May 2026 | 85.7% | 11 |
| 30 May 2026 | 86.0% | 11 |
Frequently asked questions
What is the current water level of Hay Weir?
As of June 10, 2026, Hay Weir is at 85.7% of its capacity, holding approximately 11 hm³ of water, according to BOM data.
Is Hay Weir reservoir full?
No. As of June 10, 2026, Hay Weir is high at 85.7% of its capacity, so it is not full.
Is the water level at Hay Weir rising or falling?
The level at Hay Weir has been broadly stable over the latest week on record (+0.2 points).
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.