Crews were called just before 8pm to the 7bone restaurant.
Firefighters from St Mary’s, Hightown, Redbridge, Eastleigh, Hamble and Winchester are battling the blaze and the road has been closed.
Hampshire Fire and Rescue Service said: “The road has been closed and residents in the area are being asked to keep their windows and doors closed due to the smoke.”
READ MORE: Firefighters battle Southampton restaurant fire – live updates
Two water carriers and a command unit have been deployed, along with aerial ladder platforms.
Follow our live updates as 14 crews tackle a restaurant fire in Portswood Road, Southampton pic.twitter.com/GumKARcidE
— Daily Echo (@dailyecho) July 8, 2022
Friday night revelers in nearby venues stopped to capture footage as flames burst from the roof of 7bone.
Fire crews are still working – as of 9:30 p.m. – to extinguish the fire.
Message from the Editor
Thank you for reading this article – we appreciate your support in reading the Daily Echo.
Joining the Echo means you get unlimited access to the latest Saints news, features and coverage – all with one advertising site.
You’ll also have full access to Saintsplus, your new home for Southampton FC tactical analysis, features and much, much more.
Don’t take my word for it – sign up here to see for yourself.
Follow the latest breaking news in the Southampton area by joining our Facebook group – Southampton News – Breaking News and Incidents
Follow the latest court and crime news in our exclusive Facebook group – Hampshire Court and Crime News