Climate change is altering the distribution and abundance of marine species, especially in Arctic and sub-Arctic regions. In the eastern Bering Sea, home of the world’s largest run of sockeye salmon (Oncorhynchus nerka), juvenile sockeye salmon abundance has increased and their migration path shifted north with warming, 2002-2018. For these sockeye salmon, we quantify environmental and biological covariate effects within spatio-temporal species distribution models. Spatio-temporally, with respect to juvenile sockeye salmon densities: 1) sea surface temperature had a nonlinear effect, 2) Calanus, a minor prey item, and age-0 pollock (Gadus chalcogrammus), a major prey item during warm years, had no significant effect, and 3) juvenile pink salmon (Oncorhynchus gorbuscha) had a positive linear effect on juvenile sockeye salmon densities. Temporally, juvenile sockeye salmon abundance was positively correlated with sea surface temperature, age-0 pollock abundances, and juvenile pink salmon abundance. Changes in population dynamics of sockeye salmon in response to environmental have potential implications for projecting specific future food securities and management of fisheries in Arctic waters.