Estyn, the Inspectorate for Education and Training in Wales, carried out the inspection last November.
In their recently published report, Estyn inspectors found that "pupils are confident and engage positively with staff and visitors" and that "staff build positive working relationships with pupils based on mutual respect and understanding".
"They provide sensitive guidance to support them to develop important skills, such as resilience. As a result, pupils engage purposefully with their learning".
There was also praise for our leadership team, describing them as "committed and caring".
The report states: "They are heavily invested in the pupils and the life of the school. They have a clear understanding of the needs and aspirations of pupils. Staff at the school, work in pupils’ best interests and have high expectations of them."
During the school inspection it was noted that "pupil behaviour and engagement was good".
The recent appointment of Rev. Sam Erlandson was also praised, remarking that he "furthered strengthened pastoral provision within the school".
The inspectors noted that the teachers are "highly accessible, including during break times, via electronic communications, and during boarding time".
In addition, the inspection describes St. David's College as "a welcoming and nurturing school".
Headmaster Mr Andrew Russell said: "The inspection report clearly demonstrates the commitment of everyone at the school to nurturing pupils’ individual traits and talents.
"It highlights that the learning support methodologies employed at St. David’s College pave the way for innovative teaching approaches and empower all pupils to unlock their full potential. I’m very proud to lead such a dedicated team at a wonderful school."