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, where there is a cafe / beach shop almost on the beach. Some roadside parking can be found by continuing northwards along the lane to its next junction. A little further from here a footpath leads down to the northern end of the beach.
The sand here 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. Several other Welsh beaches have squeaky sand, although some other guides wrongly state that this 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.