Faro della Guardia (Lighthouse East & West walls)

The site sits on the exposed southern tip of Ponza, with the bulk of the island to the north (roughly NNW through N to ENE) shielding it from northerly Tramontana and Maestrale seas — those sectors are heavily shadowed. The open window is the Tyrrhenian to the south: the E-SE-S-SW arc is fully exposed, taking Scirocco (SE) seas and, most significantly, Libeccio (SW) — the dominant heavy-weather swell with the longest open fetch toward Sardinia and the open sea. Westerly seas reach the point too, while the WNW-NW sector is partly blocked by the island's western coast. There is no true ocean swell here, only wind-sea over fetch, but a Libeccio or Scirocco blow builds surface chop and reinforces the current along the walls, which is what forces dives to be cancelled.