Aberystwyth, United Kingdom offers 8 beaches perfect for sunbathing, surfing, swimming, and more. Aberystwyth is known for the National Library of Wales and Aberystwyth University. The best time to travel to Aberystwyth, United Kingdom, is from June to August, with average air temperatures around 15-20°C (59-68°F) and sea temperatures around 15-17°C (59-63°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!