The National Trust beach of Whistling Sands or Porthor was once an important port serving the local area. Lying at the north-western tip of the Llyn peninsula, its sandy beach is backed by banks of sand and boulder clay, becoming rocky towards the northern end. Parking is on grass at a National Trust car park, with a P&D machine for times when it is not attended. Access to the beach is a walk of about 300 yards further down the lane, which ends in a slipway onto the sand. A cafe / beach shop is located here, almost on the beach. Some roadside parking can be found by continuing northwards along the lane to its next junction. A little further along, a footpath leads down to the northern end of the beach.
The sand on this beach consists mostly of rounded grains of quartz of a uniform size, which under dry conditions make a squeaky sound when walked upon - hence the name Whistling Sands. Some other Welsh beaches have squeaky sand, although certain sources incorrectly state that this phenomena is unique to only two beaches in all of Europe. Surf conditions can be good in winter either side of high tide and with a south-west wind, but it can get busy. It's a good choice if Hell's Mouth is blown out, but make sure you know where the rocks are! Dogs are not allowed between 1st April and 30th September.