Ventiseri is a commune in the Haute-Corse department of France on the island of Corsica.

Ventiseri has a mediterranean climate (Köppen climate classification Csa). The average annual temperature in Ventiseri is 16.7 °C (62.1 °F). The average annual rainfall is 798.7 mm (31.44 in) with October as the wettest month. The temperatures are highest on average in August, at around 25.2 °C (77.4 °F), and lowest in January, at around 9.9 °C (49.8 °F). The highest temperature ever recorded in Ventiseri was 39.9 °C (103.8 °F) on 4 July 1965; the coldest temperature ever recorded was −5.9 °C (21.4 °F) on 7 March 1971.