Kayankerni, Sri Lanka offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Kayankerni, Eastern Province, Sri Lanka, is known for the Kayankerni Coral Reef, a popular spot for snorkeling and diving enthusiasts. The best time to travel to Kayankerni, Sri Lanka, is from May to September, with average air temperatures around 28-32°C (82-90°F) and water temperatures around 27-29°C (81-84°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!