Mengham, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. Mengham, England, United Kingdom, is known for Hayling Island's beautiful beaches and the Hayling Seaside Railway. The best time to travel to Mengham, United Kingdom, is from June to August, with average air temperatures around 18-22°C (64-72°F) and water temperatures around 16-18°C (61-64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!