Justin Baldoni All Smiles Surfing Amid Blake Lively ‘It Ends With Us’ War

Justin Baldoni is focusing on good vibes only … despite his ongoing legal war against his “It Ends With Us” costar, Blake Lively.

Check it out … the actor is all smiles after hitting the ocean in Maui, Hawaii, beaming and carrying a big green surfboard while on vacation with his family.

Though, it’s lookin’ like Justin has swapped family time for some guy time.

We’re told Justin joined a group of dudes — including a couple surf instructors and another companion — for a lesson at Ukumehame Beach Park Monday … where he hung out for a bit before taking off.

Justin seems totally relaxed after his dip in the Pacific Ocean … which is the opposite of how we’d expect him to be given his current drama with Blake.

As you know, Blake filed a legal complaint against Justin — who also directed the controversial movie — with the California Civil Rights Department … accusing JB of sexually harassing her and coordinating a smear campaign against her, too. She made similar accusations in a federal lawsuit … which Justin responded to with a couple lawsuits of his own.

The costars’ legal teams are even battling it out over alleged evidence … with both camps saying one behind-the-scenes clip proves their respective narratives to be true.

It’s safe to say things are tense right now … but you can’t tell by Justin’s sunny demeanor.