Cat Hill, Ascension Island offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Cat Hill, Ascension is known for its proximity to Green Mountain National Park and the unique landscapes of Ascension Island. The best time to travel to Cat Hill, Ascension Island, is from May to October, with average air temperatures around 25°C (77°F) and water temperatures near 24°C (75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!