The ÃÂle de Batz (; ) is an island off Roscoff in Brittany, France. Administratively, it is a commune in the Finistère department of Brittany in north-western France.
ÃÂle de Batz has an oceanic climate (Köppen climate classification Cfb). The average annual temperature in ÃÂle de Batz is . The average annual rainfall is with December as the wettest month. The temperatures are highest on average in August, at around , and lowest in February, at around . The highest temperature ever recorded in ÃÂle de Batz was on 18 August 1932; the coldest temperature ever recorded was on 14 February 1929 and 18 December 1927.
Inhabitants of ÃÂle-de-Batz are called in French Batziens or ÃÂliens.
At the census of 1999 the island had a population of 575, and in 2005 it had an estimated population of 594.