Class sizes remain small, varying from a maximum of 20 in the senior school down to as low as 8 in some subjects.

Westbourne School achieved the highest grading of excellent across all categories in its 2018 Estyn Inspection.

However, the school's foundation is deemed to be during the following year in 1896 under the headship of Mrs Caroline Ferris.

On 1st February 2024, news was released that one of Westbourne's full scholarship students, Illia Mitiushnikov who was a Ukrainian refugee, had been accepted into the University of Oxford to study politics, philosophy and economics (PPE).

The Autumn term 2008 saw the establishment of the school's first sixth form, housed in a new Research and Media Centre with its separate sixth form common room and roof terrace, ICT and Computing Department.

The school is rapidly building a global reputation as a leader in innovation and STEM, powered by its use of cutting-edge technology to enhance learning across all year groups, in addition to the unprecedented collaboration and research opportunities presented by its dynamic global network of academic schools in the UK, Sydney, Singapore and, soon to launch, Mumbai.

Results at Sixth Form consistently secure Westbourne as the top small IB school in the UK.