Porthloo

Porthloo Beach faces west - there are two tidal islets called Taylor's Island and Newford Island which are to the north and south of the beach respectively. At the top of the beach is a small remnant sand dune system with the grassy area behind used for boat standing and repairs. Due to the disturbance hairy buttercup (Ranunculus sardous), along with other arable weeds appear here in one of its few sites on Scilly, and the only known site for wall-rue (Asplenium ruta-muraria) in the Isles of Scilly is just to the south. Porthloo is within an Area of Outstanding Natural Beauty, is a Geological Conservation Review site and was designated a Site of Special Scientific Interest (SSSI) in 1996. All of the land designated as Porthloo SSSI is owned by the Duchy of Cornwall. The 0.66 hectares (1.6 acres) site is notified for a succession of Quaternary sediments listed below with youngest at the top of the list:

• Aeolian loess deposits dated to 18,000 years BP (before present)
• Head deposits with breccia recognised as the type locality and known as the Porthloo Breccia. Dated to the Late Devensian 30,000 BP the pollen from organic layers indicate a tundra climate
• Storm beach laid down during the Ipswichian interglacial which started 130,000 years ago and ended about 114,000 years ago.

The Duchy of Cornwall runs a boat park at Porthloo, providing ground storage of boats.

The postbox at Porthloo Terrace was the starting point in a Top Gear challenge to race the Royal Mail's delivery of a letter to Orkney.