Tynemouth, United Kingdom offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Tynemouth, England, United Kingdom, is known for Tynemouth Priory and Castle, Longsands Beach, and the Tynemouth Market. The best time to travel to Tynemouth, 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 about 14-16°C (57-61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!