Surface temperature and salinity maps from measurements during the period of maximum coastal upwelling in the Arabian Sea are given. The region of coldest, temperature < 14°C, and freshest, salinity < 35.15‰, surface water off Ras Mabber (9°N Somali coast) shifted northeastward during a ten-day period. Off the Arabian coast the upwelled water was not as cold (minimum, 18°C) or fresh (minimum, 35.7‰) and was found between 16°N and 20°N.