Aberaeron Harbour sits at the mouth of the Afon Aeron where the river meets Cardigan Bay on the Ceredigion Heritage Coast. The harbour has tidal constraints: it dries almost completely at low water and is accessible only around 1.

5 hours either side of high tide. The sheltered inner basin is known locally as Pwll Cam ("crooked pool"), while the outer harbour is bounded by a recently constructed breakwater, part of a major coastal defence scheme completed in recent years.

The harbour traces its origins to 1808, when the passing of the Harbours Act enabled construction of the original piers and established Aberaeron as a working port.

Today it is better known as a scenic destination, framed by the town's distinctive Regency-era painted houses along the quayside.

Visitor launching is available from the South Beach Car Park, and the harbour is managed by Ceredigion County Council, with a harbourmaster contactable on VHF channel 80.