Northern Beaches
Traeth Porthor - Whistling Sands
This might just be the prettiest beach in Wales and arguably one of the prettiest anywhere. The National Trust provides a car park a few hundred yards back up the road. There is a café right on the beach. The English name for Porthor,’Whistling Sands’, is derived from the squeak or whistle emitted by the peculiar shaped sand particles being rubbed together when walked on in warm weather. The sound can be made by stamping or sliding the feet on dry sand. Dog owners should note that the beach being quite small does not allow dogs at all between 1st April and 30st September
https://www.nationaltrust.org.uk/features/porthor
https://www.thebeachguide.co.uk/north-wales/gwynedd/porthor-oer.htm
Porth Ferin
Another small and secluded beach which is largely shingle with patches of sand. This is even more of a challenge to reach than the nearby Porth Iago as it requires an additional half a mile trek on the Coastal Path to reach. There isn’t any nearby parking although some visitors take a chance and try to find a spot at the roadside to leave their car.
https://www.thebeachguide.co.uk/north-wales/gwynedd/porth-ferin.htm
https://sandee.com/beach/porth-ferin-beach-pwllheli-wales-united-kingdom
Porth Iago
https://www.youtube.com/watch?v=nv72qWvXTf4
Do an online search for Porth Iago or the Llyn Peninsula in general and you will most likely be directed to one of several breath-taking pieces of aerial drone footage of this stunning and very isolated beach. Accessed only from the Llyn Coastal Path or a local private car park (farmers field), this breath-taking beach has no facilities, no toilets and no lifeguard. It is however a true hidden gem and more than worth the effort for those able to get down the steep sandy path to the beach below.
https://www.thebeachguide.co.uk/north-wales/gwynedd/porth-iago.htm
https://coastradar.com/places/united-kingdom/gwynedd/llyn-peninsula/porth-iago-beach/
Porthdinllaen & Morfa Nefyn
These two delightful beaches lie side by side on the north coast of the llyn Peninsula. Morfa Nefyn to the east offers a car park and beachside cafe. A twenty minute walk along the sand brings you to Porthdinllaen. This tiny coastal village and beach restricts vehicle access to residents only. To reach the village, beach and the famous Ty Coch Inn requires a walk along the sands from Morfa Nefyn or via a public footpath across the Nefyn Golf Course. While here consider a visit to the RNLI Lifeboat Station, which has its own visitors centre and welcomes guests throughout the year, subject of course to their being no emergency for them to deal with. A little further on over on the west side of the peninsular you will find the National Coastwatch Institution Watch Station. Unless they are dealing with an emergency you will always receive a warm welcome.
https://rnli.org/find-my-nearest/lifeboat-stations/porthdinllaen-lifeboat-station
https://www.nci.org.uk/porthdinllaen
Nefyn Beach
Located directly to the east of Morfa Nefyn the beach at Nefyn enjoys good access from a car park close to the two and a half miles of sand. There is also a café and shop next to the car park. There is an all year round dog friendly area and the beach is completely open to dogs between 31st September and 31st March.
https://www.thebeachguide.co.uk/north-wales/gwynedd/porth-nefyn.htm
https://www.visitwales.com/attraction/beach/morfa-nefyn-beach-1821179
Trefor Beach
Lying beneath the Llyn’s highest hills, Yr Eifl, is Trefor beach. The beach is part sand and part pebble which make for a fairly dynamic coastline. The beach is best suited to fishermen, who have access to a slipway to launch their boats. Trefor also has an old pier, which is mainly used by fishermen, who can take advantage of the coast's abundant marine life.
Nearby parking is available and provides easy access to the beach. The beach is quite isolated with some beautiful views of the northern coastline.
https://www.visitsnowdonia.info/trefor-beach
https://www.thebeachguide.co.uk/north-wales/gwynedd/trefor.htm
Traeth Dinas Dinlle
Just a short drive from Caernarfon, the beautiful beach at Dinas Dinlle is well worth a visit. It has free parking nearby and a beach café that serves an excellent Welsh breakfast. Facilities include disabled access, promenade, toilets and a beach shop but you need to bring beach chairs. The beach has extensive golden sands that give way to an area of pebbles near the road.
https://www.thebeachguide.co.uk/north-wales/gwynedd/dinas-dinlle.htm