Saint Ishmaels, United Kingdom offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Saint Ishmaels is known for its proximity to the Pembrokeshire Coast National Park and the scenic Dale Peninsula. The best time to travel to Saint Ishmaels, United Kingdom, is during the summer months of June to August, when the average air temperature is around 16-20°C (61-68°F) and the water temperature is approximately 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!