This cosy, little beach is such a hidden game on the Cape Town coast. There's really not a lot of space for a lot of people so you won't have to deal with big crowds. Plus, because the beach is sheltered by huge boulders, the water temperature is a little bit higher, so you might not only dip your toes in but even swim or snorkel a bit.
Just note that there are not restrooms or restaurants around, it's just you and nature here. Parking can also be a bit tricky.