Reservoir · Victoria · Australia · BOM Water Data Online
Lake Glenmaggie
97.4% full
Capacity
177.6 hm³
Volume stored
173 hm³
River
Macalister River
Year completed
1926
Coordinates
37.907°S, 146.768°E
Last updated
2026-10-06
Current fill
97.4%vs 7 days ago
+1.5%gaining
vs 1 year ago
-0.5%year-over-year
7-day trend
→stable
Drought context
Storage vs October average
101%of normal
97.4% full on 2026-10-06, against an average of 96.3% for October across 4 years of readings (+1.1 points).
Rain over the last three months · 21 September 2026
Near normal
In the three months to 21 September 2026 the area around Lake Glenmaggie 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 −0.72). 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: 2026-10-06.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -37.907, 146.768 · Open in Google Maps
About Lake Glenmaggie
As of October 6, 2026, Lake Glenmaggie is filled to 97.4% of its total capacity, holding roughly 173 hm³ of water out of a maximum 178 hm³. At this level the reservoir is high. Of that total, about 173 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+1.5 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Lake Glenmaggie — 1064 data points between October 15, 2023 and October 6, 2026 — the level has ranged from a low of 35.9% (June 23, 2025) to a high of 99.5% (October 22, 2023). On average the reservoir is fullest around October and at its lowest around June.
The dam at Lake Glenmaggie was completed in 1926. It is operated by BOM primarily for water supply. It lies within the Macalister River Basin basin at 37.907°S, 146.768°E.
Key facts
- Current fill level
- 97.4%
- Water stored
- 173 hm³
- Total capacity
- 178 hm³
- Usable capacity
- 173 hm³
- 7-day change
- ▲ 1.5 pts
- Year-on-year
- ▼ 0.5 pts
- Primary use
- Water supply
- River
- Macalister River
- River basin
- Macalister River Basin
- Year completed
- 1926
- Operator
- BOM
- Coordinates
- 37.907°S, 146.768°E
- Last updated
- October 6, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 6 Oct 2026 | 97.4% | 173 |
| 5 Oct 2026 | 97.4% | 173 |
| 4 Oct 2026 | 97.3% | 173 |
| 3 Oct 2026 | 96.2% | 171 |
| 2 Oct 2026 | 95.7% | 170 |
| 1 Oct 2026 | 95.9% | 170 |
| 30 Sep 2026 | 96.0% | 170 |
| 29 Sep 2026 | 95.9% | 170 |
| 28 Sep 2026 | 95.9% | 170 |
| 27 Sep 2026 | 95.9% | 170 |
| 26 Sep 2026 | 96.0% | 170 |
| 25 Sep 2026 | 96.2% | 171 |