Background: Accurate temperature measurement is essential in paediatric clinical practice, as errors may result in misdiagnosis, inappropriate treatment, and compromised patient safety . Evaluating healthcare workers’ knowledge is important to ensure adherence to evidence-based guidelines and institutional protocols. Objective: To assess the knowledge of healthcare professionals regarding proper temperature measurement in children at Base Hospital – Wathupitiwala and to identify areas requiring targeted quality improvement interventions. Methods: A cross-sectional clinical audit was conducted among healthcare staff in paediatric units. Of 40 questionnaires distributed, 39 valid responses were analysed (response rate: 97 .5%). A validated 25-item multiple-choice questionnaire was used. Data were analysed using SPSS version 26, applying descriptive statistics including frequencies, percentages, mean, and standard deviation. Results: Among the 39 participants, 17 (43.6%) were doctors and 22 (56.4%) were nurses. The mean professional experience was 7 .44 ± 6.81 years (range: 1–25 years). Overall knowledge was satisfactory , with excellent performance in rectal contraindications (100%), oral technique (100%), tympanic thermometer identification (100%), documentation (94.9%), and rectal fever definition (87 .2%). However, critical knowledge gaps were identified in appropriate site selection for infants under three months (25 % correct), thermometer calibration frequency (35.9%), and age suitability for tympanic measurement (51.3%). Moderate deficiencies were observed in oralmeasurement age reliability (59%), axillary measurement duration (64.1%), and axillary feverinterpretation (69.2%). Conclusion: Although foundational knowledge was generally adequate, significantdeficiencies were identified in age-specific site selection and equipment calibration practices.Targeted educational interventions and re-audit are needed to enhance patient safety and clinical accuracy .