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Porth Clais Beach

Pembrokeshire, Wales

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Porth Clais Beach is a small, picturesque natural harbour located on the Pembrokeshire coast, offering a unique blend of natural beauty and historical significance.

Porth Clais Beach is a narrow, enclosed bay that forms a small natural harbour at the mouth of the River Alun. The beach is submerged at high tide, but at low tide, a good-sized patch of sand is revealed behind the breakwater. The bay is flanked by rocky slopes, densely packed with gorse bushes, and features a sea wall and a couple of disused lime kilns, remnants of a trading history that dates back to Roman times.

The harbour has a rich history, with limestone, grain, timber, and other goods once being traded here. Today, the area is popular with kayakers and rock climbers, and the Pembrokeshire Coast Path runs immediately above both sides of the harbour. The picturesque area is rich in birdlife, and in spring and early summer, there is an abundance of wildflowers.

The River Alun, which flows into the harbour, was once rich in eels, and in springtime, tiny glassy elvers could be seen swimming into the sea here on their long journey to the distant Sargasso Sea. Visitors to the area can enjoy kayaking, rock climbing, and walking along the Pembrokeshire Coast Path.

There is a National Trust car park close to the beach, with toilets and a small café. Charges may apply for parking. A seafront kiosk is also open in the holidays, selling refreshments.

Porth Clais Beach is adjacent to the Pembrokeshire Coast Path and the Wales Coast Path.

Harbour

Weather and tides for Monday 5 October

Today
Chance of rain 14%
Max temperature 17°C
feels like 19°C
Wind 16mph
Max UV Index
Tonight
Chance of rain 16%
Min temperature 15°C
feels like 16°C
Wind 12mph

The tide at Porth Clais Beach is currently rising. High tide will be at approximately 2:54 PM, and the next low tide will be at approximately 9:43 PM.

Today's air pollution levels are forecast to be Low

Detailed weather and tides »

Other beaches nearby

Location: Tyddewi (St Davids)

Location type: Town

OS Grid: SM743238

Coordinates: 51°52'4"N 5°16'46"W

Mapcode: GBR C5.SF3Z

What 3 Words: drawn.trooper.lyricist

Coordinates and location codes are for an approximate mid-point of the beach, and may not reflect the best access point or the most popular part of the beach.

Country: Wales

Local Authority: Pembrokeshire

Parish: St. David's and the Cathedral Close

Nearest postcode: SA62 6RR

(for sat-nav purposes only, a beach does not have a postal address!)

Important! Beach information is compiled from a variety of different sources and is correct to the best of our knowledge at the time of compilation. However, information may be incorrectly supplied by our sources or go out of date after publication. BritishBeaches.uk makes no warranty as to the accuracy of any information on this page.

Visitor information for Porth Clais Beach, Pembrokeshire, Wales. Weather, tides, visitor comments, beach facilities, photos, nearest postcode, beach information and nearby accommodation.

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216.73.216.115 Mon, 05 Oct 2026 09:39:32 +0100