Allerdale, United Kingdom offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Allerdale, England, United Kingdom, is known for the Lake District National Park and the Solway Coast Area of Outstanding Natural Beauty. The best time to travel to Allerdale, United Kingdom, is from 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!