Sematan, Malaysia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Sematan is known for its serene beaches and as a gateway to the natural beauty of Sarawak's coastline. The best time to travel to Sematan, Malaysia, is between May and September, with average air temperatures around 28°C (82°F) and water temperatures near 30°C (86°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!