Rathlin Island, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. Rathlin Island is known for the Rathlin West Light Seabird Centre and its large puffin colony. The best time to visit Rathlin Island is from June to August, when the average air temperature is around 15°C (59°F) and the water temperature is approximately 13°C (55°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!