Raymond Hide CBE FRS (17 May 1929 – 6 September 2016) was a British physicist, who was a professor of physics at the University of Oxford and, since 2000, senior research investigator at Imperial College, London.
Hide was educated at Percy Jackson Grammar School, near Doncaster, South Yorkshire and the University of Manchester, where he obtained a first-class degree in physics in 1950. He then went to Gonville and Caius College, Cambridge and was awarded a doctorate in 1953.
After research at the University of Chicago, he was a senior research fellow at the Atomic Energy Research Establishment at Harwell, Oxfordshire from 1954 to 1957. He was a lecturer in physics at King's College, Newcastle from 1957 to 1961, before becoming professor of geophysics and physics at the Massachusetts Institute of Technology (1961 to 1967). He was then head of the Geophysical Fluid Dynamics Lab at the Met Office (1967 to 1990). He was appointed a fellow of Jesus College, Oxford in 1983, holding his fellowship until 1996; he was then appointed an honorary fellow in 1997. Between 1984 and 1990, he was the professor of astronomy at Gresham College, based central London. He was director of the Robert Hooke Institute and a visiting professor in the Department of Physics at the University of Oxford from 1990 to 1992.
His research covered geophysics (geomagnetism, meteorology, geodesy, oceanography), planetary physics, geophysical fluid mechanics, including magnetohydrodynamics (MHD), and nonlinear systems. His work on the hydrodynamics and MHD of spinning fluids defined flow phenomena in atmospheres and oceans and the interiors of planetary bodies. 
Hide was elected a fellow of the American Academy of Arts and Sciences in 1964, a fellow of the Royal Society in 1971, awarded the Gold Medal of the Royal Astronomical Society for geophysics in 1989, the Royal Society's Hughes Medal in 1998 and the Royal Meteorological Society's Symons Gold Medal in 2002.
He was appointed CBE in 1990. He served as president of the Royal Meteorological Society from 1974 to 1976 and was a member of the Pontifical Academy of Sciences, having been appointed by Pope John Paul II in 1996.
- List of Gresham Astronomy Professors and their lectures on the Gresham College website (accessed 19 November 2013)
- "Professor Raymond Hide CBE". Royal Meteorological Society. Retrieved 27 November 2016.
- "Hide, Prof. Raymond". Who's Who 2008. Oxford University Press. December 2007. Retrieved 2008-10-05.
- "Professor Raymond Hide CBE". News. Royal Meteorological Society. 2016-09-08. Retrieved 2016-09-08.