He was a British philosopher, writer, and speaker, best known as an interpreter and popularizer of Eastern philosophy for a Western audience. Born in Chislehurst, he moved to the United States in 1938 and began Zen training in New York. Pursuing a career, he attended Seabury-Western Theological Seminary, where he received a master's degree in theology. Watts became an Episcopal priest but left the ministry in 1950 and moved to California, where he joined the faculty of the American Academy of Asian Studies.

Living on the West Coast, Watts gained a large following in the San Francisco Bay Area while working as a volunteer programmer at KPFA, a Pacifica Radio station in Berkeley. Watts wrote more than 25 books and articles on subjects important to Eastern and Western religion, introducing the then-burgeoning youth culture to The Way of Zen (1957), one of the first bestselling books on Buddhism. InPsychotherapy East and West (1961), Watts proposed that Buddhism could be thought of as a form of psychotherapyand not just a religion. Like Aldous Huxley before him, he explored human consciousness in the essay, "The New Alchemy" (1958), and in the book, The Joyous Cosmology(1962).

Towards the end of his life, he divided his time between a houseboat in Sausalito and a cabin on Mount Tamalpais. His legacy has been kept alive by his son, Mark Watts, and by many of his recorded talks and lectures that have found new life on the Internet. Critic Erik Davis notes the freshness, longevity, and continuing relevance of Watts's work today, observing that his "writings and recorded talks still shimmer with a profound and galvanizing lucidity."
Watts was born to middle class parents in the village of Chislehurst, Kent, in 1915, living at 3 (now 5) Holbrook Lane. His father was a representative for the London office of the Michelin Tyre Company, his mother a housewife whose father had been a missionary. With modest financial means, they chose to live in pastoral surroundings and Alan, an only child, grew up playing at brookside, learning the names of wildflowers and butterflies. Probably because of the influence of his mother’s religious family the Buchans, an interest in "ultimate things" seeped in. But it mixed with Alan’s own interests in storybook fables and romantic tales of the mysterious Far East.

Watts also later wrote of a mystical vision he experienced while ill with a fever as a child. During this time he was influenced by Far Eastern landscape paintings and embroideries that had been given to his mother by missionaries returning from China. The few Chinese paintings Watts was able to see in England riveted him, and he wrote "I was aesthetically fascinated with a certain clarity, transparency, and spaciousness in Chinese and Japanese art. It seemed to float...". These works of art emphasized the participative relationship of man in nature, a theme that stood fast throughout his life.