Helena Maria de Jesus Águas (born 16 June 1956), known professionally as Lena d'Água, is a Portuguese singer.

In 1973 she enrolled briefly in Sociology but, as the 25 April 1974, Carnation Revolution came to fruition, she left university and joined a theatre group, later majoring in Education.

Her latest album Desalmadamente was released in 2019 and brought her back to original songs, all composed by Pedro da Silva Martins.

In November 2024, Lena d’Água released her new album, Tropical Glaciar, featuring songs written by Pedro da Silva Martins, a celebrated songwriter known for his work with artists such as Ana Moura and António Zambujo, who used to be in the band Deolinda.

Lena described the collaboration with Pedro as transformative, stating that his compositions seamlessly blend with her iconic hits from the 1980s, creating a cohesive sound for her live performances.