Rajgama, Sri Lanka offers 1 beach perfect for sunbathing, surfing, swimming, and more. Rajgama, Southern Province, Sri Lanka, is known for its proximity to the historic city of Galle and the scenic beaches of Unawatuna. The best time to travel to Rajgama, Sri Lanka, is from December to March, with average air temperatures around 27°C (81°F) and water temperatures near 28°C (82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!