Portugal was represented at the Eurovision Song Contest 1986 with the song "", written by Guilherme Inês, Zé Da Ponte, and LuÃÂs Manuel de Oliveira Fernandes, and performed by Dora. The Portuguese participating broadcaster, (RTP), selected its entry at the 1986.
(RTP) held the 1986 at its studios in Lisbon on 22 March 1986, hosted by Henrique Mendes and Maria Helena Fialho Gouveia, who hosted the very first Portuguese national final in 1964.
Mendes and Fialho Gouveia introduced and made light commentary on the songs, which were taped in advance for the television audience. Each television region in Portugal (Ponta Delgada, Funchal, Porto, and Lisbon) submitted three songs for this year's Festival. An expert jury decided the winner, and only the placement of the top three songs were made public.
The winning entry was one of the songs from Lisbon, "Não sejas mau para mim", performed by Dora and composed by Guilherme Inês, Zé Da Ponte, and LuÃÂs Manuel de Oliveira Fernandes.
Dora was the twentieth and last performer on the night of the contest, following Finland. At the close of the voting the song had received 28 points, placing 14th in a field of 20 competing countries. Despite its low placing, it would be the highest rank Portugal would receive in the Contest between 1985 and 1990.