Calshot, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. Calshot is known for Calshot Castle and Calshot Activities Centre. The best time to travel to Calshot, United Kingdom, is from June to August, when the average air temperature is around 18°C (64°F) and the water temperature is approximately 16°C (61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!