Insolation, net radiation, and various oceanic and atmospheric variables were measured at sites 13 and about 120 km off the coast of Oregon in July and August 1973. A total of ten 24-hour stations were occupied. The daily mean net solar radiation ranged from 0.10 to 0.40 cal cm-2 min-1, and large spatial variations of radiation in this upwelling region were present. The daily mean values were not closely related to the proportion of sky covered with clouds, but a mean from all the stations was in reasonable agreement with one cloud formula. The net long-wave radiation varied from about -0.01 cal cm-2 min-1 under overcast skies to -0.10 cal cm-2 min-1 under clear skies. Daily mean values appear closely related to cloud amount, and a cloud factor of 1-0.9C, as suggested by previous workers, seems appropriate for stratocumulus clouds. The measured clear-sky net long-wave radiation is appreciably less than that given by numerous widely used formulas but is supported by other observations and by a formula derived by Anderson.