Keith Best joined the Met Office in 1947 and worked at RAF stations around Britain. Between 1964 and 1968 he was based at London Weather Centre, except for the first half of 1966 when he was consultant to the World Meteorological Organization in Geneva. From mid-1968 to mid-1969 he was in charge of the Met Office at Salalah in Oman.
He returned to the London Weather Centre as a forecaster in 1969 and between 1978 and 1985 was senior met officer at Southampton Weather Centre, when he also acted as weatherman for BBC Southampton's South Today. He was a BBC TV forecaster from May 1972 to January 1978 and also on BBC radio from 1971 to 1978.
In late 1985 he was based at Heathrow Airport and then returned to the London Weather Centre until taking early retirement in 1989, since when he has undertaken freelance writing, lecturing and broadcasting occasionally as a relief weather presenter on Breakfast News in 1990. He enjoys golf, gardening, shooting, sailing and is a river bailiff.