Diddy’s cooling his heels in jail waiting for sentencing … but his ex-GF Daphne Joy is handing herself a life sentence of bikini time — and damn, she’s bringing the heat!

Daphne’s absolutely owning it in her halter-neck bikini — which was working overtime to keep her assets in check — striking sultry poses and whipping her hair like a full-on Baywatch babe in her sizzling IG display posted Wednesday.

Daphne was modeling hard AF — debuting new colors in her Daphne Joy Swimwear line — and yeah, the heat was cranked all the way up!

It’s all sunshine, swimwear, and sass for Daphne — three things her disgraced ex can’t touch right now.