As well as activities for youngsters, visitors could watch traditional dancing, take part in craft activity, learn about the park itself and enjoy food and drink in record breaking temperatures.
The events filled the area along the line of the lime tree avenue, which at times was a mass of people enjoying some cooling shade.
SKDC Cabinet Member for Environment, Cllr Dr Peter Moseley, said: "It was a wonderful day and the atmosphere was like a relaxed garden party as the event went on around people enjoying their picnics.
"This is the second year we've held a May Day event here and it proved to be the right mix. From children playing in the splash pool to the Morris and maypole dancing, it was also a return to traditional family fun."
Maypole dancing from youngsters of the Grantham School of Dancing entertained visitors, along with Lincoln and Mickelbarrow Morris dancers and clog dancing from the Maids of Clifton.
There were nature-related events such as creatures in compost, and the day was supported by Lincolnshire Bat Group, the Woodland Trust and Community Books.
The developers currently upgrading Wyndham Park, Robert Woodhead, were also there to discuss the ambitious £1 million Heritage Lottery Funded project and show people what the finished park will look like.
The event ran smoothly thanks to the help of 23 volunteers who helped out. Anyone who wishes to assist at future events should contact Julie Ashworth at South Kesteven District Council on 01476 406033.
Details of forthcoming events are also available at wyndhamparkgrantham.co.uk and on our Facebook page facebook.com/wyndhamparkgrantham
For media enquiries:
Email the SKDC communications team at firstname.lastname@example.org or phone 01476 406498 or 406440.