Sri Lanka Tourism lists April–October as the surf season. Regional breaks include Arugam Point, Crocodile Rock, Peanut Farm and Pottuvil Point. Waves vary by day; some are too strong for beginners. Check conditions and learn with an instructor: https://www.srilanka.travel/attraction?attraction_id=101
Island Surf School at Pottuvil Point lists 90-minute lessons: beginner LKR 7,000 and intermediate LKR 8,000, both with board rental; longboard LKR 10,000 (the page does not specify board rental). These are one school’s prices, not an entry fee or general local tariff; advanced guiding is quoted on request. Confirm current rates and inclusions: https://islandsurfschoolarugambay.com/explore-our-packages/
Enjoy beach walks, sunrise views and time in Pottuvil. The official guide warns that strong waves can make swimming difficult. Check weather and local advice, and stay within your ability.
Cover: Dennis Sylvester Hurd, “Beach of Arugam Bay”, 22 February 2022; CC0 1.0: https://commons.wikimedia.org/wiki/File:Beach_of_Arugam_Bay.jpg