Carrickfergus, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. Carrickfergus is known for Carrickfergus Castle, a well-preserved Norman castle that attracts many tourists. The best time to travel to Carrickfergus, United Kingdom, is from June to August, when the average air temperature is around 15-20°C (59-68°F) and the water temperature is approximately 13-15°C (55-59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!