Blackwattle Bay Marina is a purpose-built commercial marina located at Pyrmont on Sydney Harbour, constructed to replace an earlier facility that had reached the end of its useful life.

The 22-berth marina is designed to accommodate charter vessels ranging from 8 to 40 metres in length, with power and water supplied to each berth and a sewage pump-out facility on site.

The marina includes a public boardwalk providing waterfront access to the bay, forming part of a broader baywalk route. Its location in the inner harbour puts it within easy reach of the Sydney CBD, the Fish Market, and the wider harbour waterway network.