High Newton by the Sea, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. High Newton by the Sea is known for its proximity to the scenic Northumberland Coast and the historic Dunstanburgh Castle. The best time to visit High Newton by the Sea, United Kingdom, is from June to August, when the average air temperature is around 15-20°C (59-68°F) and the sea temperature is approximately 13-16°C (55-61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!