Reservoir · Victoria · Australia · BOM Water Data Online
McCay
83.8% full
Capacity
1.4 hm³
Volume stored
1 hm³
River
Off-stream
Year completed
1960
Coordinates
37.092°S, 144.300°E
Last updated
2026-10-08
Current fill
83.8%vs 7 days ago
-3.3%losing
vs 1 year ago
+24.1%year-over-year
7-day trend
↓falling
Drought context
Storage vs October average
114%of normal
83.8% full on 2026-10-08, against an average of 73.3% for October across 4 years of readings (+10.5 points).
Rain over the last three months · 21 September 2026
Near normal
In the three months to 21 September 2026 the area around McCay 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 +0.12). 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: 2026-10-08.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -37.092, 144.300 · Open in Google Maps
About McCay
As of October 8, 2026, McCay is filled to 83.8% of its total capacity, holding roughly 1 hm³ of water out of a maximum 1 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has fallen by 3.3 percentage points, and it is 24.1 points above its level on the same date a year earlier.
Across the readings we hold for McCay — 1059 data points between October 13, 2023 and October 8, 2026 — the level has ranged from a low of 59.5% (October 6, 2025) to a high of 97.9% (April 3, 2024). On average the reservoir is fullest around April and at its lowest around October.
The dam at McCay was completed in 1960. It is operated by BOM primarily for water supply. It lies within the Off-stream Basin basin at 37.092°S, 144.300°E.
Key facts
- Current fill level
- 83.8%
- Water stored
- 1 hm³
- Total capacity
- 1 hm³
- 7-day change
- ▼ 3.3 pts
- Year-on-year
- ▲ 24.1 pts
- Primary use
- Water supply
- River
- Off-stream
- River basin
- Off-stream Basin
- Year completed
- 1960
- Operator
- BOM
- Coordinates
- 37.092°S, 144.300°E
- Last updated
- October 8, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 8 Oct 2026 | 83.8% | 1 |
| 7 Oct 2026 | 84.4% | 1 |
| 6 Oct 2026 | 85.0% | 1 |
| 5 Oct 2026 | 85.6% | 1 |
| 4 Oct 2026 | 86.1% | 1 |
| 3 Oct 2026 | 86.5% | 1 |
| 2 Oct 2026 | 86.9% | 1 |
| 1 Oct 2026 | 87.1% | 1 |
| 30 Sep 2026 | 87.1% | 1 |
| 29 Sep 2026 | 87.4% | 1 |
| 28 Sep 2026 | 87.9% | 1 |
| 27 Sep 2026 | 88.4% | 1 |