Stirling

As of September 6, 2026, Stirling is filled to 51.3% of its total capacity, holding roughly 29 hm³ of water out of a maximum 57 hm³. At this level the reservoir is within its normal operating range. Of that total, about 56 hm³ is usable (live) storage.

Over the most recent week on record the fill level has held broadly steady (+0.3 pts), and it is 8.8 points below its level on the same date a year earlier.

Across the readings we hold for Stirling — 1052 data points between September 11, 2023 and September 6, 2026 — the level has ranged from a low of 43.1% (May 23, 2024) to a high of 71.5% (November 22, 2024). On average the reservoir is fullest around November and at its lowest around June.

The dam at Stirling was completed in 1948. It is operated by BOM primarily for water supply. It lies within the Harvey River Basin basin at 33.109°S, 116.044°E.