Cathedral Oceans II is an album of instrumental ambient music by John Foxx. It was released in 2003 as disc two of a two disk set, the first disk being the original Cathedral Oceans album, now renamed Cathedral Oceans I. The second album follows on from the first in style and substance.
The back cover of the CD digipack introduces the combined tracklisting as "...music for a vast, half-submerged ruined cathedral...". Cathedral Oceans III was released two years later.