Ipswich Borough Council has said it is doing everything it can to "regain possession of the land" after a number of travellers have pitched at Chantry Park.
About eight caravans were spotted in Chantry Park on Wednesday evening.
It comes after other caravans were seen in the park last week.
A spokesman for Ipswich Borough Council said: "The council is aware that a group of Travellers arrived at Chantry Park late yesterday afternoon.
"We will take all necessary steps to regain possession of the land as soon as possible.”
The arrival of the travellers comes after a number of caravans pitched up at the park in May.
About 20 caravans were spotted in Christchurch Park in June.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here