On 25 March 1818 Hotham was appointed a member of the Board of Admiralty, his position being renewed in March 1819 and February 1822, serving until March 1822. On 28 May 1825 he was promoted to vice-admiral, and returned to serve on the Board of Admiralty in September 1828, renewed in June 1829 and July 1830, until November 1830. He was appointed Commander-in-Chief in the Mediterranean on 30 March 1831, and on 4 July 1831 was made a Knight Grand Cross of the Order of St Michael and St George.