It has a maximum altitude of 414m, an area of 32.4m2, an elongated shape and a coastline 42km long.
The island’s terrain is rocky. There are bushes and low vegetation with seasonal greens and herbs. The dry stones covering almost the whole island define arable lands, most of which remain unexploited. Small crops (mainly wheat, barley, oil, wine, legumes, onions, vegetables and figs) constitute a supplementary source of income for a limited number of households.
The climate is dry, characterized by little rainfall, cool summers and mild winters.
The eastern side of Folegandros has been included in the European Network of Protected Areas NATURA 2000 as a Site of Community Importance (SCI) and a Special Protection Area (SPA). Folegandros as a whole has been declared an Important Bird Area in Greece.