Westcliff High School for Boys performs well in regards to academic attainment, with academic performance in
Key Stage 4 consistently being above 90% in various areas, with 98% of students achieving a strong pass (grade 5) or higher in English and Mathematics. Westcliff High School for Boys is in the highest 16% and highest 20% for all schools in progress and attainment scores respectively. Ofsted's 2023 inspection of the school gave an 'Outstanding' rating across all areas. WHSB's
Progress 8 score for the academic year 2023–24 is 0.93, which puts the school in the 'Well above average' performance band. In The Sunday Times Good Schools Guide 2026, WHSB was ranked 190th among the top joint state and independent secondary schools in the UK. The school achieved 14.8% A* grades at
A level, with 50.2% of entries graded A*-A and 77.9% graded A*-B, placing it 253rd nationally for A-level performance. At
GCSE, 74.9% of grades were awarded at grades 9–7 (≈ A**-A), resulting in a joint 150th national ranking. As of September 2025, the school is constituted of 1,292 pupils, with 1,217 boys (94.2%) and 75 girls (5.8%). The sixth form is a mixed sex cohort. == Headmasters ==