Known for its powerful right-hand waves, it is a popular destination for experienced surfers. The spot is situated on a rocky reef, which contributes to its consistent surf conditions. The best time to surf at Backdoor is during mid to high tide, with the ideal swell direction coming from the west and northwest. The spot is less favorable with wind from the south and southeast. Backdoor is part of the Ericeira World Surfing Reserve, a designation that recognizes its unique and rich surf heritage. Despite its popularity, the spot can be quite challenging due to its fast and hollow waves, making it more suitable for advanced surfers. The origin of its name is unclear, but it is often associated with its counterpart in Hawaii, known for similar wave characteristics.