Kourtney Kardashian swims in her pajamas at the beach with friends

Kourtney Kardashian spent the weekend at the beach with a few pals, as they celebrated a birthday.

She took to her Instagram Story as she went for a swim Saturday with her friend Addison Rae, both of them fully clothed in their pajamas for the dip.

The 41-year-old floated on her back in a classic red striped set, as Addison donned a matching pair in blue, both of them soaking wet.