BANGKOK, Aug 24 (Reuters) - Thailand's economy is expected to grow by about 3% this year and about 4% the next, with low chances of aggressive interest rate hikes unless necessary, the central bank governor said on Wednesday.

The baht has been volatile but there have been no unusual capital movements and the central bank will only take action on any excessive moves in the currency, Governor Sethaput Suthiwartnarueput told reporters on the sidelines of a business forum. (Reporting by Kitiphong Thaichareon; Writing by Orathai Sriring; Editing by Clarence Fernandez)