Oletta (French pronunciation: [ɔlɛta]) is a commune in the Haute-Corse department of France on the island of Corsica.

Oletta has a hot-summer Mediterranean climate (Köppen climate classification Csa). The average annual temperature in Oletta is 15.7 °C (60.3 °F). The average annual rainfall is 757.3 mm (29.81 in) with November as the wettest month. The temperatures are highest on average in July, at around 24.0 °C (75.2 °F), and lowest in February, at around 8.7 °C (47.7 °F). The highest temperature ever recorded in Oletta was 40.1 °C (104.2 °F) on 1 August 2017; the coldest temperature ever recorded was −4.9 °C (23.2 °F) on 15 February 2012.