Old Colwyn, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. Old Colwyn is known for its proximity to the Welsh Mountain Zoo and the scenic Colwyn Bay in Wales, United Kingdom. The best time to travel to Old Colwyn, United Kingdom, is from June to August, when the average air temperature is around 15-20°C (59-68°F) and the average water temperature is approximately 15°C (59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!