The lovebirds, who confirmed their romance on Valentine’s Day, are going strong four months in.
They had great fun on a getaway to Montecito, California – and they weren’t alone.
His children Alabama, 15, Landon, 17, also frolicked in the sea as they spent some quality time together.
Blink 182 drummer Travis, 45, showed off his tattooed torso as he emerged from the water.
He wore a pair of patterned board shorts and could be seen playfully grabbing Kourtney’s bottom as the beauty sported some small swimwear.
His former stepdaughter Atiana De La Hoya, 22, was also on the trip.
As the excited group ran toward the waves, they could be heard screaming as they splashed around.
As always, Kourtney, 42, looked ultra-glam – and very wet.
They took a break from their PDA social media snaps but letting fans in on their trip.
It comes after he ex Scott Disick has given his “blessing” to the new relationship.
Scott, 38, shares three children with Kourtney, 42 – and their turbulent 10-year relationship was showcased throughout reality TV show Keeping Up With The Kardashians.
During a reunion episode which brings the curtain down on a successful 14-year run of the show, Scott publicly addressed his ex-girlfriend’s latest move.
The show’s host Andy Cohen asked Scott if he approved of Kourtney’s new romance, and Scott said he did.
He said: “I think if you really love somebody you want them to be happy no matter what. So I do give her a blessing to be happy.”
Both Kourtney and Scott perviously admitted that they may have had a future together had it not been for his substance abuse struggles.
The pair split in 2015 following his addiction issues and she gave the thumbs up for his romance with 20-year-old influencer Amelia Gray Hamlin.
Amelia isn’t the first younger woman that has been romantically involved with Scott.
The Talentless founder was previously coupled up with Lionel Richie’s daughter Sofia, 22.
And when he was questioned on the show about his attraction to younger women, he said: “Everybody gets this wrong, that I look for young girls. I don’t go out looking for young girls – they happen to be attracted to me, because I look young.”