 On 27 August 1917 "Spiteful" was reported entering Lough Swilly, in north-western Ireland, along with destroyers , and .From May to December 1918, by which time the war had ended, "Spiteful" was again listed as part of the Portsmouth Local Defence Flotilla, but also as a tender for "HMS "Victory"", as Portsmouth Naval Barracks were named at the time.From January to April 1919 she was listed only as based at Portsmouth, but in May that year she was listed as being based there without an officer in command.