[1] After sea trials Porlock Bay was commissioned on 14 February 1946 for service in the America and West Indies Station under the command of Lieutenant Dudley L. Davenport.

After training she was attached to the Plymouth Local Flotilla and finally sailed for Bermuda with sister ship Padstow Bay on 22 July.

[1] Once repaired she took part in visits to Newfoundland and Canada, arriving at St John's on 7 September for the National Convention on the political future of the Colony, and took the Governor, Sir Gordon Macdonald on an official tour of isolated settlements on south coast.

In July she took part in a programme of official visits by the Governor of the Bahamas to the Turks and Caicos Islands, but on the 21st was despatched to Belize City in British Honduras after Guatemalan threats to the colony, remaining there until early August.

Porlock Bay spent the year 1948 as part of the Fishery Protection Squadron in home waters, and was put into reserve at Devonport in January 1949.