Kendall and Kylie Jenner's 2015 Swim Style Is Fab

The Kardashian-Jenner clan is soaking up the last bit of summer sun this week, vacationing on the island of St Bart's. Kendall and Kylie Jenner posted a bikini selfie to Instagram Tuesday before heading out on a boating adventure with the fam. No doubt these young ladies are ending their summer style on a positive note.

After celebrating her 18th birthday at Nice Guy in West Hollywood, followed by a mini vacay in Punta Mita, Mexico, I assumed the youngest Jenner would be all glammed out from the many wardrobe changes that ensued. But the Jenner sisters rarely disappoint when it comes to their water-friendly wardrobe, and their boating attire was no exception.

Snapping a standard hotel mirror selfie before throwing on their denim short-shorts (which they casually left unbuttoned btw), the sisters stunned in their designer swimwear. Kendall opted for a simple olive green bikini while Kylie wore a silver mesh two piece. "We woke up in paradise too," the selfie queen, otherwise known on Instagram as King Kylie, captioned the shot, which not only gave followers all the swim style inspo, but all the jealous feels. Back to school vibes are coming on strong these days, even for adults.

Since September is just around the corner, I'm encouraging you to take advantage of the last few weeks of the summer months. Slip into your favorite swimsuit, soak up some sun, and check out nine other times this summer Kendall and Kylie Jenner provided us with swimwear style inspo in 2015.

1. Itsy Bitsy Teeny Weenie Purple Bikini

Kylie hit the beach in a purple two piece.

2. Swimming With Kourtney

Love her side cut-out bottoms.

3. Making Headlines

Oh, the infamous one piece that made headlines across media platforms, whether it was because of its sexy vibes or the fact that she matched Jessica Simpson.

4. Welcome To Miami

Wearing a white two piece bikini.

5. Triplets

The Jenner sister's matched their BFF Lauren Perez poolside in a white and pink striped one piece.

6. Coachella Chillin'

Shades and bikini style.

7. Orange Bikini And Belly Bling

Because swimwear should be accessorized too.

8. Floating On Swan

Which is way cooler than a boat by far.

9. Floral Tube Top

Kendall looks like a summer babe in this picture, and pretty much all year tbh.

The Jenner sisters are such #SwimwearGoals.