Spaceboots is a raw and depressive black metal project from Santa Rosa, California, formed in 2013. They work in the lo-fi, emotionally corrosive tradition of depressive black metal, pairing minimal production with bleak atmospheric intensity.

Spaceboy is a San Francisco band formed in 2017, navigating an eclectic intersection of progressive stoner, doom, and death metal. Their genre-blending approach reflects the Bay Area's history of genre-boundary-pushing heavy music, layering psychedelic texture over heavier structural ambitions.

Spawn Winters is a gothic and doom metal band from Los Angeles, California, formed in 2016, weaving mournful atmosphere and heavy, downtuned riffs into a sound that draws equally from the melancholic gothic metal tradition and the glacial weight of doom.

Spectra is a heavy metal band from Rubidoux, California, formed in 2016, working within the traditional heavy metal style with an emphasis on melodic songwriting and classic genre sensibilities. Their sound reflects the enduring influence of the NWOBHM and American power metal traditions.

Spectral Tower is an atmospheric black/doom metal project from San Luis Obispo, California, formed in 2014, crafting expansive, desolate soundscapes that merge glacially slow tempos with windswept black metal tremolo and melancholy atmosphere.

Spectral Woods is a raw black metal solo project from Eureka, California, formed in 2019, producing primitive, lo-fi black metal rooted in harsh production and misanthropic Northern California forest aesthetics.

Speed Demon is a thrash/speed metal band from Monterey, California, formed in 2022, drawing on punk-infused speed metal in the mold of early Motörhead and Agent Steel, favoring raw velocity and stripped-down song structures.

SpeedBurner is a speed/thrash metal band from Los Angeles, California, formed in 2019, playing fast, stripped-down metal informed by the early 1980s speed metal tradition and classic thrash aggression.

Spektre is a California black metal and dark ambient project formed in 2022, weaving harsh black metal compositions with ambient atmospheric passages to create an unsettling and immersive sonic experience.