West Mersea, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. West Mersea is known for its famous Mersea Island oysters and the annual Mersea Island Food, Drink & Leisure Festival. The best time to travel to West Mersea, United Kingdom, is from June to August, when the average air temperature is around 20°C (68°F) and the water temperature is approximately 17°C (63°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!