Surface air temperature (SAT) retrieval at 2 m using Global Positioning System (GPS) radio occultation (RO) observations is presented in this paper. These measurements were further incorporated to estimate turbulent heat fluxes. The results show that the root mean square (RMS) of RO derived SAT (SAT^RO) is better than 1.1°C and the standard deviation (STD) is less than 0.9°C. Furthermore, the turbulent heat fluxes derived from RO observations show smaller deviations from the Tropical moored buoys than the other gridded products analyzed in this study, revealing that the SAT^RO is helpful in improving surface turbulent heat flux estimation.