It first started trading in August 1945 and on its first day sold out of ice cream in two hours and made £48.
The Harbour Bar is now owned and run by Guilian Alonzi and his wife Theresa.
TAKE A LOOK: 32 pictures of the Harbour Bar as it prepares to celebrate is 75th anniversary here

5. Harbour Bar's 75th birthday
Just some of the awards and accolades on display in the Harbour Bar - which is styled like a 1950s milk bar Photo: staff

6. Harbour Bar's 75th birthday
The cafe is popular with all ages. Olivia Cockerill enjoys her ice cream treat with her Nan Jacqueline Rogerson Photo: staff

7. Harbour Bar's 75th anniversary
The cafe sells scores of different flavoured ice cream in cones - add a Flake to make it a 99 Photo: staff

8. Harbour Bar's 75th birthday
The site on the seafront before the building was to become the site of the Harbour Bar Photo: third party