Nocturnal at the breeding colonies. Nesting pairs enter and leave nest only at night. Presumably sleep in burrow or on water at sea. May frequent nesting colony year-round, but most activity occurs from February to October. Both sexes incubate and feed the young, which fledge about 84 days after hatching.
House mice eat storm-petrel eggs.
Peregrine falcons may take ashy storm-petrels at sea and near colonies on land. Hunt et al. Ainley, D. G., S. Morrell, and T. J. Lewis. 1975. Patterns in the life histories of storm petrels on the Farallon Islands. Ainley, D. G. and R. J. Boekelheide.