Oysterhaven is a sheltered sea inlet on the south coast of Ireland, located approximately ten miles southwest of Cork Harbour entrance.

The haven has two arms — a northerly branch that shelves rapidly off Walton Court beach, and a nor'westerly channel navigable only by dinghy, extending toward Belgooly some three miles upstream.

The anchorage offers good protection from all but southerly winds.

Mariners approaching should exercise caution around Harbour Rock, which lies midway between Oysterhaven beach and Ferry Point, and should avoid the shallow channel between the Little Sovereign and the shore.

The beach at Walton Court is a popular summer destination, home to the Oysterhaven Activities Centre, one of Ireland's first windsurfing schools, which offers a range of water-based activities including kayaking, stand-up paddleboarding, and sailing instruction.