Dover, United Kingdom offers 21 beaches perfect for sunbathing, surfing, swimming, and more. Dover is known for the iconic White Cliffs of Dover and Dover Castle. The best time to travel to Dover, United Kingdom, is from June to August, with average air temperatures around 18-21°C (64-70°F) and sea temperatures around 16-18°C (61-64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!