Reservoir · Victoria · Australia · BOM Water Data Online
Lake Nillahcootie
101.1% full
Capacity
40.4 hm³
Volume stored
41 hm³
River
Broken River
Year completed
1967
Coordinates
36.884°S, 146.003°E
Last updated
2026-08-18
Current fill
101.1%vs 7 days ago
0.0%stable
vs 1 year ago
+39.1%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: 2026-08-18.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -36.884, 146.003 · Open in Google Maps
About Lake Nillahcootie
As of August 18, 2026, Lake Nillahcootie is filled to 101.1% of its total capacity, holding roughly 41 hm³ of water out of a maximum 40 hm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 39.1 points above its level on the same date a year earlier.
Across the readings we hold for Lake Nillahcootie — 334 data points between September 10, 2023 and August 18, 2026 — the level has ranged from a low of 38.6% (June 14, 2025) to a high of 113.6% (October 4, 2023). On average the reservoir is fullest around January and at its lowest around August.
The dam at Lake Nillahcootie was completed in 1967. It is operated by BOM primarily for water supply. It lies within the Broken River Basin basin at 36.884°S, 146.003°E.
Key facts
- Current fill level
- 101.1%
- Water stored
- 41 hm³
- Total capacity
- 40 hm³
- 7-day change
- No change
- Year-on-year
- ▲ 39.1 pts
- Primary use
- Water supply
- River
- Broken River
- River basin
- Broken River Basin
- Year completed
- 1967
- Operator
- BOM
- Coordinates
- 36.884°S, 146.003°E
- Last updated
- August 18, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 18 Aug 2026 | 101.1% | 41 |
| 10 Aug 2025 | 62.0% | 25 |
| 9 Aug 2025 | 61.9% | 25 |
| 8 Aug 2025 | 61.8% | 25 |
| 7 Aug 2025 | 61.7% | 25 |
| 14 Jun 2025 | 38.6% | 16 |
| 13 Jun 2025 | 39.2% | 16 |
| 12 Jun 2025 | 40.6% | 16 |
| 17 Oct 2024 | 82.2% | 33 |
| 16 Oct 2024 | 82.3% | 33 |
| 15 Oct 2024 | 82.3% | 33 |
| 14 Oct 2024 | 82.4% | 33 |