Seine Bight, Belize offers 1 beach perfect for sunbathing, surfing, swimming, and more. Seine Bight is known for its proximity to the Garifuna cultural experiences and the beautiful beaches of the Placencia Peninsula. The best time to travel to Seine Bight, Belize, is from late November to mid-April, with average air temperatures around 75-85°F (24-29°C) and water temperatures near 80°F (27°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!