The violence has affected traditional markets in Western countries prompting the industry to seek new markets in the Middle East, Eastern Europe and Asia.
August arrivals fell 31 percent to 30,672 from August 2007.
But de Alwis said that the fall was sharp as the number of visitors last year had increased because of an international conference and the Indian Cricket Tour.
De Alwis said charter flights that were canceled last year were resuming and that hotels were reporting strong bookings for this winter season.
"In my last discussions with hoteliers they said bookings are good. We're going to have a good winter," he said.
"The lucrative events we had in 2007 August have made this Augus