The Seaside is the third demo album from English rock group Cardiacs. The album originally featured the second recording of what would become the band's only hit single, "Is This the Life?". It is the last of the band's releases to feature keyboard player/drummer/singer Mark Cawthra and the first to feature keyboard player William D. Drake (as well as being the only album to feature two other musicians who were briefly Cardiacs members - Graham Simmonds and Marguerite Johnson).