Coleraine, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. Coleraine is known for its proximity to the Causeway Coast and the Giant's Causeway. The best time to travel to Coleraine, United Kingdom, is from June to August, with average air temperatures around 15-20°C (59-68°F) and water temperatures around 14-16°C (57-61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!