Reservoir · Victoria · Australia · BOM Water Data Online
McCay
87.3% full
Capacity
1.4 hm³
Volume stored
1 hm³
River
Off-stream
Year completed
1960
Coordinates
37.092°S, 144.300°E
Last updated
2026-07-26
Current fill
87.3%vs 7 days ago
-0.3%losing
vs 1 year ago
-1.9%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: 2026-07-26.
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 July 26, 2026, McCay is filled to 87.3% 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 held broadly steady (-0.3 pts), and it is 1.9 points below its level on the same date a year earlier.
Across the readings we hold for McCay — 1063 data points between July 30, 2023 and July 26, 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
- 87.3%
- Water stored
- 1 hm³
- Total capacity
- 1 hm³
- 7-day change
- ▼ 0.3 pts
- Year-on-year
- ▼ 1.9 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
- July 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Jul 2026 | 87.3% | 1 |
| 25 Jul 2026 | 87.6% | 1 |
| 24 Jul 2026 | 88.0% | 1 |
| 23 Jul 2026 | 88.2% | 1 |
| 22 Jul 2026 | 88.2% | 1 |
| 21 Jul 2026 | 88.5% | 1 |
| 20 Jul 2026 | 89.1% | 1 |
| 19 Jul 2026 | 89.6% | 1 |
| 18 Jul 2026 | 90.0% | 1 |
| 17 Jul 2026 | 90.4% | 1 |
| 16 Jul 2026 | 90.6% | 1 |
| 15 Jul 2026 | 90.6% | 1 |
Frequently asked questions
What is the current water level of McCay?
As of July 26, 2026, McCay is at 87.3% of its capacity, holding approximately 1 hm³ of water, according to BOM data.
Is McCay reservoir full?
No. As of July 26, 2026, McCay is high at 87.3% of its capacity, so it is not full.
Is the water level at McCay rising or falling?
The level at McCay has been broadly stable over the latest week on record (-0.3 points).
How much water can McCay hold?
McCay has a total capacity of 1 hm³.
Where is McCay reservoir located?
McCay is located in Victoria, Australia, within the Off-stream Basin basin (coordinates 37.092°S, 144.300°E).
When was McCay dam built?
The dam at McCay was completed in 1960.
What is McCay used for?
McCay is used primarily for water supply, and is managed by BOM.