Lake Mackintosh

As of September 7, 2026, Lake Mackintosh is filled to 22.0% of its total capacity, holding roughly 201 hm³ of water out of a maximum 914 hm³. At this level the reservoir is low.

Over the most recent week on record the fill level has risen by 3.9 percentage points, and it is 4.0 points above its level on the same date a year earlier.

Across the readings we hold for Lake Mackintosh — 1093 data points between September 11, 2023 and September 7, 2026 — the level has ranged from a low of 7.4% (July 11, 2026) to a high of 32.2% (August 30, 2024). On average the reservoir is fullest around October and at its lowest around June.

The dam at Lake Mackintosh was completed in 1980. It is operated by BOM primarily for water supply. It lies within the Mackintosh River Basin basin at 41.633°S, 145.739°E.