This work investigated the acoustic features of English closing diphthongs articulated by Owerri speakers, in order to show how these features are different from or similar to the Standard British English. Data for the study, which were elicited from ten bilingual Owerri speakers of English, comprise a wordlist that contained closing diphthongs read in isolation and within the context of connected speech and tape-recorded using a Sony Xperia Android phone recorder. The analysis, which was done acoustically using Praat, focused on lengths, formants and pitch. Formant measurement and the comparison of the glide from the first vowel to the second vowel within the diphthong showed that the respondents had almost the same values for F1 and F2 in /??/, /??/, and /??/ sound, which were different from the values for the SBE, while the articulation of the /e?/ sound is varied among the respondents. Lower vowel heights were also observed for the L2 respondents than the SBE in addition to a more frontal F2 for the SBE than Owerri respondents.