Antarctic Bottom Water (AABW) is a cold, dense water mass formed around Antarctica that ventilates the global abyssal ocean. Recent studies have reported widespread warming, freshening, and thinning of AABW, yet its temporal variability remains poorly constrained because of sparse observations. This limits our ability to distinguish trends induced by climate change from natural variability. We address this limitation by examining seasonal and interannual AABW variability using dye-like tracers in the high-resolution ocean-sea ice model ACCESS-OM2-01. The tracers are released in four key AABW formation regions: the Ross and Weddell Seas, Prydz Bay and the shelf adjacent to Adélie Land. We find pronounced differences in the magnitude and time scales of AABW variability across formation regions. AABW from the narrow-shelf regions (Prydz Bay and Adélie Land coast) is characterised by high seasonal variability (0.16 tracer units) that can be traced at depths greater than 3500 m. Seasonal variability of AABW formed on the wide shelves is below 0.08 tracer units. Interannual variability of AABW is strongest (0.16 tracer units) along the continental slope in the Weddell Sea. Advective timescales show that AABW from narrow-shelf sources ventilate the abyss on much shorter time scales (~1 year) than AABW from wide shelves (3-4 years). These findings provide new context for interpreting observed deep-ocean changes, helping to distinguish anthropogenic trends from natural variability and sampling limitations.