The town, well-known for the World Heritage Angkor complex, projects 200,000 tourists during the new year holidays this year, Chheuy Chhorn, deputy director of the Siem Reap Tourism Department, told the Phnom Penh Post.
The Sangkran festival, or Songkran in Thai, begins on Sunday and runs until April 16. It features concerts, trade fairs and cultural activities, the official added.
The town has 166 hotels and 233 guesthouses, according to the agency. Some of them are fully booked during the long holiday, the newspaper said.
Siem Reap is the top destination for visitors to Cambodia. Last year, more than 2.23 million tourists visited the town, an 8% rise from 2012.