This metadata record describes a mix of intertidal seawater and air temperature data collected at Cape Mendocino North, California, USA by PISCO. Measurements were collected using HOBO Temperature/Light Data Logger (Onset Computer Corp. UA-002-64) beginning 2014-01-04. Site temperature loggers are bolted down in a wire cage at various locations within each site. Mussel growth temperature loggers are bolted down in a wire cage at high, mid, or low positions within a mussel bed. Temperature is recorded at 15.0 minute intervals.