Newton Stewart, United Kingdom offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Newton Stewart is known for its proximity to Galloway Forest Park, a popular destination for outdoor activities and stargazing. The best time to travel to Newton Stewart, United Kingdom, is during the summer months of June to August, when the average air temperature is around 15-20°C (59-68°F) and the water temperature is approximately 14-16°C (57-61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!