Several tens of thousands of temperature profiles are used to investigate the thermal evolution of the cold wake of Typhoon Fanapi, 2010. Typhoon Fanapi formed a cold wake in the Western North Pacific Ocean on 18 September characterized by a mixed layer that was >2.5?°C cooler than the surrounding water, and extending to >80?m, twice as deep as the preexisting mixed layer. The initial cold wake became capped after 4?days as a warm, thin surface layer formed. The thickness of the capped wake, defined as the 26?°C–27?°C layer, decreased, approaching the background thickness of this layer with an e-folding time of 23?days, almost twice the e-folding lifetime of the Sea Surface Temperature (SST) cold wake (12?days). The wake was advected several hundreds of kilometers from the storm track by a preexisting mesoscale eddy. The observations reveal new intricacies of cold wake evolution and demonstrate the challenges of describing the thermal structure of the upper ocean using sea surface information alone.