Hawthorn, United Kingdom offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Hawthorn, England, United Kingdom, is known for the Hawthorn Dene Nature Reserve and its scenic coastal walks. The best time to travel to Hawthorn, United Kingdom, is during late spring to early summer (May to June) when the average air temperature is around 15-20°C (59-68°F) and the North Sea water temperature is approximately 10-13°C (50-55°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!