Stone Sloth is a doom/sludge metal band from Santa Cruz, California, formed in 2016, embracing deliberately slow tempos and down-tuned riffs that capture the heavier side of the Northern California coast's underground scene.

Stone Temple Pilots emerged from San Diego amid the grunge explosion to become one of the '90s' most versatile and commercially successful rock bands, with Scott Weiland's chameleon-like vocals leading the charge on classics like 'Core,' 'Purple,' and 'Tiny Music.' Their ability to move fluidly between grunge heaviness, psychedelic pop, and breezy power pop distinguished them from the Seattle pack, even as Weiland's personal struggles became as well-known as the music itself.

Storm the Gates is a thrash metal band from San Jose, California, formed in 2016, drawing from the Bay Area thrash tradition with high-energy, speed-driven material.

Stormbat is a thrash/groove metal band from Watsonville, California, formed in 2013, combining the rhythmic punch of groove metal with thrash's relentless forward momentum.

Stormblade is a traditional heavy metal band from Santa Ana, California, formed in 2017, drawing from the classic NWOBHM and American heavy metal playbook with sharp, melodic riffwork.

Stormbringer is a black metal band from Murietta, California, formed in 2015, practicing a raw and atmospheric approach to the genre rooted in second-wave Scandinavian influences.

Stormbringer is a death/black metal band from Auburn, California, formed in 2015, combining black metal's atmospheric malice with the brutality and heaviness of death metal.

Stormcrow is an Oakland, California band formed in 2005 that merges the rawness of crust punk with grinding death metal brutality, earning recognition in underground circles for their ferocious, socially charged material.

Stormdemon is a black/death metal band from California, formed in 2025, blending the blasting aggression of death metal with black metal's atmospheric hostility.