Fatumiala (or Sail Rock) is a small island in the Pacific Ocean, a part of the Shefa Province of Vanuatu.

Sail Rock is located north-west of the island of Tongoa, between the latter and Epi.

The islet has an elevation of 15 m above the sea level.

Fatumiala and the other islands scattered around Tongoa (Laika, Tefala) were once part of a larger landmass, which constituted the emerged part of the Kuwae submarine volcano and which united Tongoa with Epi.

The volcano's caldera exploded around 1452, creating small islands.