Written with people moving from Turkey in mind. The Portuguese rules still apply more broadly.
Exchanging Your Driving License
You have 90 days after getting your residency card to start the exchange process with IMT. For many countries, you can keep driving, but you must register your intent.
The process requires a medical certificate (Atestado Médico) which you can easily get from a private doctor or your Centro de Saúde for a small fee.