On 1 February 2016, Doucouré signed to Premier League side Watford for an undisclosed fee and immediately sent him to La Liga club Granada CF on loan.[3] Doucouré made his first La Liga appearance one week later, as he came on as an 80th-minute substitute for Adalberto Peñaranda in a 1–2 home loss against Real Madrid.[4][deprecated source] Doucouré scored his first goal for Watford on 4 March 2017, netting an injury time consolation as Watford lost 3–4 to Southampton.[5]