Reservoir · New South Wales · Australia · BOM Water Data Online
Seaham Weir
Current fill: N/A
Capacity
7.4 hm³
Volume stored
N/A
River
Williams River
Year completed
1979
Coordinates
32.614°S, 151.765°E
Not currently reporting
The most recent reading for this reservoir is from 2025-12-17, more than 45 days ago, so the current fill is shown as N/A. The history below reflects that older reading.
Current fill
N/Avs 7 days ago
N/Avs 1 year ago
N/A7-day trend
N/ADrought context
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Seaham 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).
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 32.614°S, 151.765°E · Open in Google Maps
About Seaham Weir
The dam at Seaham Weir was completed in 1979. It is operated by BOM primarily for water supply. It lies within the Williams River Basin basin at 32.614°S, 151.765°E.
Key facts
- Total capacity
- 7.4 hm³
- Usable capacity
- 2.4 hm³
- Primary use
- Water supply
- River
- Williams River
- River basin
- Williams River Basin
- Year completed
- 1979
- Operator
- BOM
- Coordinates
- 32.614°S, 151.765°E
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 17 Dec 2025 | 10.3% | 0.76 |
| 20 Oct 2025 | 12.7% | 0.94 |
| 19 Oct 2025 | 12.8% | 0.95 |
| 18 Oct 2025 | 12.9% | 0.96 |
| 17 Oct 2025 | 12.8% | 0.95 |