Brynmill, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. Brynmill, Wales, United Kingdom, is known for its proximity to Swansea University and the scenic beauty of Singleton Park. The best time to travel to Brynmill, United Kingdom, is late spring to early summer (May to June) when the average air temperature is around 15-20°C (59-68°F) and the water temperature is approximately 12-15°C (54-59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!