Prineville, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Prineville is known for the Ochoco National Forest and the Crooked River. The best time to travel to Prineville, United States, is during the summer months of June to August, when the average air temperature is around 70-85°F, and water temperatures in local lakes and rivers are typically in the 60s°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!