2018 Lisboa Belém Open – Doubles

Ruan Roelofse and Christopher Rungkat were the defending champions but chose not to defend their title.

Marcelo Arévalo and Miguel Ángel Reyes-Varela won the title after defeating Tomasz Bednarek and Hunter Reese 6–3, 3–6, [10–1] in the final.

Seeds
• # Sander Arends / 🇨🇦 Adil Shamasdin (semifinals)

• # Marcelo Arévalo / 🇲🇽 Miguel Ángel Reyes-Varela (champions)

• # 🇵🇪 Sergio Galdós / 🇧🇷 Fabrício Neis (quarterfinals)

• # Marin Draganja /  Tomislav Draganja (semifinals)