New Grimsby, United Kingdom offers 5 beaches perfect for sunbathing, surfing, swimming, and more. New Grimsby, England, United Kingdom, is known for Tresco Abbey Garden and its collection of subtropical plants. The best time to travel to New Grimsby, United Kingdom, is during the summer months of June to August, when the average air temperature is around 15-20°C (59-68°F) and the water temperature is approximately 14-17°C (57-63°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!