Vaiʻava Strait (Samoan: Vāinuʻu o Vaiʻava) is a narrow strait in Vatia, American Samoa which separates the 420-foot-high (130 m) Pola Island (Cock's Comb) from Polauta Ridge on adjacent Tutuila Island.

The strait is a good example of cliffs formed by the erosional forces of waves on volcanic rock.

A 250-acre (100 ha) area surrounding the strait was designated a U.S. National Natural Landmark in 1972.

Pola Tai is a 400-foot (120 m) cliff that is an important nesting area for the fuaʻō (brown booby) and tavaʻe (white tailored tropic bird).

Hunting of brown boobies, known as the Aʻega o le Pola, was a tradition carried out by Vatians in the past.