Cefn Sidan
Nude beach in Carmarthenshire, United Kingdom
Cefn Sidan is a beach that is customarily clothing optional in Carmarthenshire, United Kingdom. The sea is warmest in August at about 17°C (62°F) and coolest in February (8°C (46°F)). Average air temperatures peak in August at 16°C (62°F). There are 4 other naturist places within 50 km (31 mi), the closest being Whiteford Sands (11 km (6.9 mi)).
Weather and water temperature at Cefn Sidan
Tap a month. Averages: air 2001–2025 (NASA POWER), sea 1991–2020 (NOAA OISST).
| Month | Air | Sea | Rain |
|---|---|---|---|
| January | 7°C | 9°C | 124 mm |
| February | 7°C | 8°C | 94 mm |
| March | 7°C | 8°C | 86 mm |
| April | 9°C | 9°C | 64 mm |
| May | 12°C | 11°C | 73 mm |
| June | 14°C | 13°C | 79 mm |
| July | 16°C | 16°C | 89 mm |
| August | 16°C | 17°C | 99 mm |
| September | 15°C | 17°C | 84 mm |
| October | 13°C | 15°C | 126 mm |
| November | 10°C | 13°C | 137 mm |
| December | 8°C | 10°C | 140 mm |
Not sure what the numbers mean? Here is how warm is warm enough to swim.
Visiting
- Coordinates: 51.70240, -4.37460 · OpenStreetMap
- Local law: is public nudity legal in United Kingdom?
- Before you go, read our nude beach etiquette guide.
- First time? Read our guide to your first time at a nude beach.
Naturist places near Cefn Sidan
- 1Whiteford Sands nude beach · SwanseaCustomarySea 17°C in August
- 2Marros Sands nude beach · CarmarthenshireCustomarySea 17°C in August
- 3Sker Beach nude beach · BridgendCustomarySea 18°C in August
- 4Fish Bench Bay nude beach · BridgendCustomarySea 18°C in August
- 5Morfa Dyffryn naturist park or area · GwyneddOfficial
- 6Budleigh Salterton nude beach · DevonOfficialSea 17°C in August
- 7Weston Mouth nude beach · DevonCustomarySea 17°C in August
- 8Petit Tor Beach nude beach · TorbayToleratedSea 17°C in August
Status labels: Official · Naturist only · Clothing optional · Tolerated · Customary · Listed · Prohibited · Closed. Statuses come from open data and are not yet verified in person.
Frequently asked questions
Is Cefn Sidan clothing optional?
Cefn Sidan is listed as "customarily clothing optional" according to British Naturism: Cefn Sidan aka Pembrey Beach. Rules can change, and clothing-optional zones are often only part of a beach, so look for signs on arrival and follow local rules. You can check what applies in United Kingdom before you go.
How warm is the water at Cefn Sidan?
Long-term sea surface temperatures (NOAA OISST, 1991–2020) range from 8°C (46°F) to 17°C (62°F) in August. Water at the shore can be a few degrees different.
What other naturist places are near Cefn Sidan?
The closest are Whiteford Sands (11 km (6.9 mi)), Marros Sands (16 km (9.9 mi)) and Sker Beach (47 km (29 mi)).
Sources
Status checked on 2026-10-31 against British Naturism: Cefn Sidan aka Pembrey Beach (naturist federation listing); see how we verify. Data updated 2026-10-31. Wikipedia · Wikidata Q1194493 · All data sources and licenses.