The teenager was arrested after a violent incident outside a supermarket in Oldfield Place, believed to be a Co-op store, between 7.10pm and 7.30pm on May 19.
A woman in her 30s was reportedly attacked with a bottle and suffered injuries resembling stab wounds.
She was taken to a nearby hospital and has since been discharged.
Officers have said the incident involved several people.
Police believe many people witnessed the incident and urging these bystanders to come forward with information, also asking for any relevant phone, CCTV or dashcam footage.
The suspect is currently out on bail pending further investigation.
Anyone with information can reach Kent Police at 01474 366149, using reference 46/82053/24, or reach out to Crimestoppers anonymously through their hotline or their website’s online form.
