Porth Diana Nature Reserve

Porth Diana Nature Reserve_Lin Cummins

A small nature reserve near Trearddur Bay, well known for the spotted rock-rose, Anglesey's County Flower


Just off Ravenspoint Road
Trearddur Bay
LL65 2AQ - houses adjacent to the reserve

OS Map Reference

SH254781 - reserve entrance
A static map of Porth Diana

Know before you go

2 hectares

Entry fee


Parking information

No parking adjacent to the reserve; park on Ravenspoint Rd and enjoy the walk around the bay towards the reserve

Grazing animals

Yes - autumn/winter

Walking trails

Uneven public right of way and path through heather and grassland


Two kissing gates at either end of the path through the reserve may restrict access 


On a lead

When to visit

Opening times

Open at all times

Best time to visit

Mid summer for spotted rockrose

About the reserve

Porth Diana is home to the spotted rock rose, Anglesey's county flower. The reserve is part of the nationally important coastal heath on the west coast of Holy Island. Characteristic plants here include bell and common heather and in the open patches of grassland, wildflowers such as spring squill and English stonecrop can be seen. There is a healthy population of invertebrates, including green tiger beetle and mottled grasshopper

Contact us

North Wales Wildlife Trust- Chris Wynne
Contact number: 01248 351541

Environmental designation

Site of Special Scientific Interest (SSSI)