HMS Riviera was a seaplane tender which served in the Royal Navy (RN) during the First and Second World Wars. Converted from the cross-Channel packet ship SS Riviera, she was initially fitted with temporary hangars for three seaplanes for aerial reconnaissance and bombing missions in the North Sea. She participated in the unsuccessful Cuxhaven Raid in late 1914 before she began a more thorough conversion in 1915 that increased her capacity to four aircraft. Riviera and her aircraft then spent several years spotting for British warship bombarding the Belgian coast and making unsuccessful attacks on targets in Germany. She was transferred to the Mediterranean in 1918 and returned to her owners the following year.