Iho dong, South Korea offers 1 beach perfect for sunbathing, surfing, swimming, and more. Iho dong, Jeju do, South Korea, is known for Iho Tewoo Beach and its iconic horse-shaped lighthouses. The best time to travel to Iho-dong, South Korea, is in late spring (May to June) when the average air temperature is around 18-22°C (64-72°F) and the water temperature is approximately 16-20°C (61-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!