This dataset comprises sea surface temperature (SST) measurements from the Bohai Sea and South China Sea, spanning the period from January 2010 to December 2020. The dataset includes daily mean SST values recorded at 135 nodes in the Bohai Sea and 484 nodes in the South China Sea. The spatial coverage for the Bohai Sea is defined by the coordinates 117.5° to 121.5°E and 36.5° to 40.5°N, while the South China Sea encompasses 112.375° to 117.675°E and 12.125° to 17.375°N.