He could use a few days on the beach.

Kevin Costner hit the Caribbean this week after his divorce saga, according to Page Six spies.

We’re told the “Field of Dreams” star was on Richard Branson’s Necker Island in the British Virgin Islands for the Necker Cup, the annual tennis tournament dubbed the “world’s most exclusive pro-am tennis event.”

Sandy sources said Costner seemed in high spirits and more interested in looking to the future than dwelling on his headline-making split from wife of 19 years, Christine Baumgartner.

“He was talking to other guests about his upcoming movie projects, and he even screened part of his latest movie,” said an island hopper.

“He’s so nice!” raved the smitten spy.

We’re told Costner took part in all the activities that went on around the tennis tourney (he also took to the court to play a few games), like scuba diving and sailing and attended nightly dinners with the other celebrities, including Michael Bolton, Jewel, Emma Watson, tennis greats Genie Bouchard and Mike Bryan, and others.

Meanwhile, we hear Branson was “the epitome of the ultimate host,” taking a team on a catamaran race and wowing the crowds with his windsurfing prowess at 73.

Guests — who we’re told paid as much as $100,000 to visit the island and play with the best tennis stars in the world — also played pickle ball and attended the famed “End of the World Party.”

Over the summer, Costner battled with Baumgartner in a court case that included the actor booting her out of their mansion, a wrangle over child support and accusations that she cleared out their home of valuables before she moved out.

They eventually settled the divorce in September, with the “Bodyguard” star paying her more child support than their pre-nup dictated.

A rep for Costner didn’t get back to us.