Porth Neigwl, known as Hells Mouth, is one of North Wales' more recognizable surf spots. Located at the end of the Llyn Peninsula, this beach is a solid swell catcher. When low pressure systems linger south in Biscay, the resulting swells come in between the Irish and Welsh coasts, hitting this long sandy bay right. This spot is popular among surfers, so be prepared to share the waves during good conditions.

The surf here can be pretty decent, especially when it’s firing. Swells come in from the South, SouthWest, and WestSouthWest, generally handling sizes from about 2 feet (0.6 meters) to 6 feet (1.8 meters). The corner at the southern end offers a wedgy left-hander that peels over rocky bottoms before ending on sand. To the north, you’ve got the Reef, which is a busy right-hander. In between, there are several beach break peaks. The waves can be fun for intermediate surfers, but keep an eye out for those conditions, as rips can be a hassle when the swell picks up.

Access is straightforward with a small parking area at the southern end leading to the beach. The spot can get busy, but since it's spread over a big beach, there’s usually room to find your own space. It’s best to check conditions before heading out since swells can appear and disappear rapidly. The winds from the NorthNorthWest and NorthEast are preferable, and a low to mid tide generally works well. Expect to see a mix of shortboards, fish, funboards, longboards, and bodyboards on the sand.