In this paper, mathematical modeling for the thermal performance of floating cum tilted-wick type solar still has been presented. Explicit expressions for the temperatures of various components of the proposed system and its efficiency have been developed. The effect of mass flow rate due to capillary action of jute wick has been investigated for evaporative, convective, and radiative heat transfer from the evaporating surface to the condensing surface.It has been found that the mass flow rate of 2.5 x 10(-3)kg/s is optimum for effective distillation. Also, the effect of absorptivity of the wick surfaces (floating and tilted-wick) on the productivity of the solar still has been studied and found that (w1) (absorptivity of the tilted-wick surface) and (wf)(absorptivity of the floating-wick surface) of 0.85 have given higher productivity.For enunciation of the analytical results, numerical calculations have been made using meteorological parameters for a typical winter and summer day in Coimbatore.The theoretical results are in good agreement with the experimental results.