جزیره صای

Also known as Jazīrat Sāy

thumb|Ruins of the Ottoman fortress thumb|upright=0.8|The remains of the medieval cathedral, 1850s Saï is a large island in the Nile River in Nubia between the second and third cataracts, in the country of Sudan. It is 12 km long and 5.5 km wide. Saï was intermittently occupied by the Egyptians during the New Kingdom. In the Makurian period it was the center of a bishopric, while in the second half of the 16th century the Ottomans founded a fortress on the island.