Final answer:
The Beach Boys are primarily associated with the Surf Rock genre, a sub-genre of rock music popular in the 1960s.
Step-by-step explanation:
The primary genre of music associated with the Beach Boys is Surf Rock, which is a sub-genre of rock music. The Beach Boys were renowned for their distinctive California sound that embodied the surf culture of the 1960s. Surf Rock became a phenomenon during this era, with bands like the Kingsmen and the Ventures influencing the sound that led to the development and popularity of this musical style.
This genre of music placed an emphasis on the guitar and had a particular sound that resonated with the lifestyle and imagery of the surfing community. The Beach Boys contributed significantly to the sensations encompassing this genre with their harmonious vocals and upbeat rhythms.