Evapotranspiration is crucial for managing water resources in agriculture. A study tested a method called flux variance to estimate heat fluxes in tea plants. This method uses air temperature measurements to calculate sensible heat flux and additional data for latent heat flux. The results showed that the flux variance method accurately estimated heat fluxes compared to direct measurements. In summer, the method had a good agreement with the measured data, showing its effectiveness in estimating heat fluxes in tea plants.