 This study reveals that high predictability of the Mansoon TROF-MT is shown by the current atmosphere-ocean coupled forecasting system with the correlation coefficient being 0.84 for the model ensemble prediction with observations from 1960 to 2005. The high predictability arises mainly from the tropical DIPOL-AC surface temperature over the maritime continent and tropical Pacific Ocean, which favours convection around the warm pool and further excites the vorticity anomalies over the western North Pacific, WNP. Good knowledge of the MT could provide promising prediction of TC activity over the WNP, including the occurrence and energy of TCS. The findings suggest that coupling between the WNP circulation and tropical ocean acts as an important source of seasonal predictability in the WNP and highlight the importance of the MT for seasonal prediction of TCS over the WNP. This article was authored by Chaofan Li, Riyulu, and Guanghua Chen. We are article.tv, links in the description below.