Quintenic (French pronunciation: [kɛ̃tnik]; Breton: Kistenid; Gallo: Qeintenit) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.

The average annual temperature in Quintenic is 11.3 °C (52.3 °F).

The average annual rainfall is 743.4 mm (29.27 in) with November as the wettest month.

The temperatures are highest on average in August, at around 17.5 °C (63.5 °F), and lowest in January, at around 5.8 °C (42.4 °F).

Inhabitants of Quintenic are called quintenicais in French.