Based on the monthly weather report of Korea Meteorological Administration (KMA) and daily sea surface temperature (SST) data from National Fisheries Research and Development Institute (NFRDI) in 2006, heat budget was estimated at Gampo in the eastern coast of Korea, the region occuring the cold water known as upwelling in summer. Net heat flux was transported from the air to the sea surface during February to November, and it amounts to 345 Wm-2 in monthly mean value. During December to January, the transfer of net heat flux was conversed from the sea surface to the air with -56 Wm-2 in minimum of monthly mean value in January. Long wave radiation was ranged from 6 Wm-2 to 106 Wm-2. Sensible heat was varied from -36 Wm-2 (June) to 61 Wm-2 (February) and showed negative values from April to August. Latent heat showed 20 Wm-2 (July) with its minimum in July and 49 Wm-2 with its maximum in March in monthly mean value. The annual mean of net heat flux is 129 Wm-2, giving an annual heat surplus of 22 Wm-2. Thus, during summer, the upwelled cold water at Gampo, appears to compensate the heat gain. However the ways in which these compensations are accomplished remains to be clarified.