The turbulent film boiling from a vertical non-isothermal surface is formulated with due consideration to thermal radiation from its lateral face. It is observed that the application of Reynolds analogy together with thermal conduction in the test surface has yielded a conjugate solution from which the case of an isothermal condition can be generated as a special case. The analysis has further paved the way in establishing a functional relation between the Nusselt numberNu, radiation parameterN R , fin parameterM, temperature ratio termT s /(T w,0−T s ), and a product of characteristic modified Grashof, Prandtl and superheating parameter defined as (Gr 2 Pr S). In a fully developed turbulent film boiling i.e., modified Grashof number being greater than 1010, the temperature ratio term accounts for the non-linearities arising due to the inclusion of radiation from the lateral face of the fin. The results are in good agreement with experimental data over a wide range of system conditions.