Oldtown, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Oldtown, Idaho, United States, is known for its proximity to the scenic Pend Oreille River and the nearby Kaniksu National Forest. The best time to travel to Oldtown, United States, is in late spring (May to June) when the average air temperature is around 65-75°F and water temperature is approximately 55-65°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!