All beaches / Wales / Beaches
Porth Nefyn
Gwynedd
We do not read the water company's overflow data here yet, so storm overflows within 3 km of Porth Nefyn are not shown.
Generally good samples over the last four seasons.
- Latest E. coli
- <10
- per 100 ml, 17 Sep 2026
- Latest enterococci
- <10
- per 100 ml
- Overflows within 3 km
- -
- Spills nearby, 30 days
- -
- Excellent or Good
- Sufficient
- Poor
- Overflow discharging
- Overflow
- Offline
About this beach
The bathing water is located in a long curved north facing bay. The beach is a gently sloping sandy beach as is backed by boulder clay cliffs. The beach is backed by the town of Nefyn, and then agricultural land. The cliffs are part of the Porth Dinllaen to Porth Pistyll SSSI and also the Clogwyni Pen Llyn / Seacliffs of Llyn Special Area of Conservation. The water quality sample point lies opposite the end of the minor road down onto the beach.
From the Natural Resources Wales profile.
Storm overflows within 3 km
Nearest first, straight-line distance.We do not read the water company's overflow data here yet, so overflows within 3 km are not shown.