Surfside Girls is an Apple TV+ teen girls half-hour mystery series running 10 episodes.

Teen best friends Jade (Miya Cech) and Sam (YaYa Gosselin) live in the small California coastal town of Surfside where the most exciting issue is the nearby cliff unnaturally eroding into the sea. In the first episode Sam almost drowns but ends up in hidden cave where she picks up a doubloon (gold coin) and eventually is visited by Remi (Spencer Hermes-Rebello) a ghost pirate teen.

Apparently whatever is causing the cliff to erode is also destroying Remi's home, a ghost pirate ship. Jade and Sam agree to help Remi find the cause. Meanwhile Jade and Sam have issues of their own, mostly that Jade is a science geek going to summer science class and her new smart friends make Sam rather uncomfortable and left out. This eventually leads them to break up for an episode or two until their investigations bring them back together.

Since it's half hour episodes things move fairly quickly. As a teen series there are no high stakes or melodrama so it's pleasant watching. Overall it's a good family series.