The crowds lapped up free buckets and spades, deckchairs, a traditional seaside cartoon 'peep through board' and Punch and Judy shows and were rewarded with glorious sunny spells on each day of the event, funded by SKDC.
The Council's Cabinet Member for Communications and Engagement Cllr Helen Goral said: "Thank you to all those families and individuals who took the time to visit the beach and enjoy Grantham-on-sea!
"It was great to see so many enjoying the novelty of the seaside in the middle of one of our towns and make sandcastles in the incredible 13 tonnes of sand."
SKDC's Cabinet Member for Retail and Visitor Economy Cllr Nick Robins said: "We're pleased Grantham beach was such a big success for a second year.
"The team have been working very hard and exploring lots of new ideas to help increase the number of people visiting the High Streets in our four market towns and in particular on market days."