Blackness, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. Blackness, Scotland, United Kingdom, is known for Blackness Castle, a historic fortress featured in various films and TV shows. The best time to travel to Blackness, United Kingdom, is during late spring to early autumn (May to September), when the average air temperature ranges from 12°C to 19°C (54°F to 66°F) and the water temperature is around 10°C to 15°C (50°F to 59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!