Dalwood was born on 2 June 1924 at 78 Whiteladies Road, Clifton, Bristol. He was apprenticed to the Bristol Aeroplane Company (1940–44), and attended the Bristol School of Art part-time. After national service in the Royal Navy, he studied at Bath Academy of Art. He was a teacher of sculpture at several institutions over the years. He married Mary Nicolson and they had two daughters. They divorced in 1963 and he married Caroline Gaunt, who produced two sons. They divorced in 1974. He died 2 November 1976 in St Bartholomew's Hospital, London.
In 1959 he won first prize at the John Moores exhibition in Liverpool for his ovoid Large Object and won the David Bright prize at the 1962 Venice Biennale. From 1959 to 1962 he was engaged on a commission to construct a large cast aluminium relief mural (6.4 x 6.1 m) for the new Bodington Hall student accommodation complex at the University of Leeds. The significance of this work was considered such that the building was scheduled Grade II listed on grounds that he was a leading sculptor; it represented his first large scale output in his great period, and its high aesthetic quality. When the Hall was demolished, the mural was transferred to another University of Leeds building.
- The Sculpture of Hubert Dalwood by Chris Stephens (1999) published: The Henry Moore Foundation in association with Lund Humphries ISBN 0-85331-786-0.
- "Dalwood, Hubert Cyril". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/64394.(Subscription or UK public library membership required.)
- Historic England. "Hubert Dalwood Mural (1412199)". National Heritage List for England. Retrieved 20 April 2017.
- "'Standing Draped Figure', Hubert Dalwood". Tate. Retrieved 4 December 2013.
- "'Lucca', Hubert Dalwood". Tate. Retrieved 4 December 2013.
- "'Large Object', Hubert Dalwood". Tate. Retrieved 4 December 2013.
- "'O.A.S. Assassins', Hubert Dalwood". Tate. Retrieved 4 December 2013.
- "'Maquette for 'Arbor'', Hubert Dalwood". Tate. 15 January 1972. Retrieved 4 December 2013.