In February 1810 he embarked with his unit for the Peninsula, but their transport ship "Camilla" nearly sank and had to put back. Owing to this, D troop did not take the field as a unit until 1811. However, Whinyates was present at Busaco in 1810, acting as adjutant to the officer commanding the artillery. He was also at the Battle of Albuera on 16 May 1811 with four guns, the cavalry affair at Usagre on 25 May, and in the actions at Fuentes de Guinaldo and Aldea de Ponte on 25 and 27 Sep