Abstract Despite widespread attention on tropical cyclone (TC)‐induced cold wakes, the dynamic recovery of evaporation duct height (EDH) post‐typhoon remains unclear. Using ERA5 data from 338 Northwestern Pacific TCs (2003–2023), we quantify the spatiotemporal evolution of EDH after TC passage. Results indicate that initial EDH reduction significantly precedes maximum ocean cooling. Remarkably, 14–20 days post‐typhoon, the EDH fully recovers and even overshoots its pre‐typhoon climatological state. This long‐term duct reconstruction stems from asynchronous air‐sea recovery paces. Post‐typhoon, the near‐surface atmosphere rapidly dries out, while large thermal inertia causes slow ocean warming. Although the lingering cold seawater thermodynamically suppresses evaporation, the profound atmospheric dryness dominates this competition, overcoming the thermal suppression to forcefully drive surface moisture evaporation. Additionally, stronger, slower, and larger TCs significantly amplify this phenomenon. This study reveals how asynchronous air‐sea evolution reshapes duct environments after TC passage, providing vital insights for forecasting maritime electromagnetic communications.