Penlan slopes is surrounded by urban development of Penlan and Brynhyfryd and is predominately composed of dry heath/acid grassland mosaic with smaller areas dominated by scrub and amenity grassland.
The site is important for a number of species of flora and fauna including the protected small blue butterfly and early marsh orchid.
Site of Importance for Nature Conservation (SINC 221)
Grid Reference SS646956
OS Explorer Map 165 Swansea