Looking for a free adult crochet watermelon bikini pattern that’s actually flattering, summer-ready, and quick to make? You’re in the right spot. I designed this watermelon bikini for women who want something playful for the beach, the pool, or a backyard photo shoot — and the best part is you can finish the whole set in a weekend with just one ball of cotton yarn in each color. The fitted construction means no wardrobe malfunctions, and the classic red-white-green colorway makes it instantly recognizable. Whether you’ve been crocheting for years or you’re looking for a fun summer challenge, this crochet watermelon bikini is one of those makes that gets noticed everywhere you wear it.

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Who Wore it Best? ACK – not sure I want to compete with a Princess! I fell in love with this look when I saw that picture of Meghan Markle and I set out to make a copycat pattern. I’ll be totally honest, I had a lot of fun making this AND taking the matching selfies! If you have a couple hours and want to make something fun for the summer, try this out. Don’t skimp on the yarn, you really don’t want to have any wardrobe malfunctions here. I used a 100% cotton yarn and a small crochet hook so the stitches were nice and tight.

Materials

• Crochet hook size 3.5mm (you could also use 3.25mm if you want it tighter) — grab a hook bundle here
• 1 ball each of 100% cotton aran yarn in Red, Green, and White (with a small amount of black for accents).
• Tapestry needle for weaving in ends
• Scissors

Abbreviations

• ST: Stitch
• YO: Yarn over
• CH: Chain
• SS: Slip stitch
• SC: Single crochet
• DC: Double crochet
• Picot (P): Chain three and insert hook into first chain, YO and pull through

Crochet Watermelon Bikini Pattern

Cups (Make 2)

With Red, ch 13.

Round 1: SC in the second CH from hook. SC 1 in each CH to make 12 SC total. In the last chain, do another SC, making it have two total SC. Ch 1 and again do 2 more SC in the same CH. Now on the back side of the CH you will do 12 more SC until you reach your first starting chain.

Round 2: CH 1 and turn. SC in each SC from the previous round until you get to the CH 1 space in the previous round. In that CH 1 space, SC, CH 1, SC, and then do 1 SC in each of the next SC from the previous row.

Rounds 3–14 (or to size): Continue Round 2 until you reach your desired width and height for your cup, keeping in mind that for the border you will be adding one more additional row of SC around the entire cup.

Bottom of cup: CH 1 at the end of your last round and turn so you are working across the bottom of the cup. SC as evenly as possible along the bottom of the cup.

Assembly

Edging: With red, and starting with the RS bottom right corner and right cup, SC around the right side. At the top of the cup, ch 50, then SC in each of those newly created chains (front right tie created), and down the left side. Chain 3 and attach the next cup. SC across the right side, at the top ch 50, then SC in each of those newly created chains (front left tie created) and down the left side. SC across the bottom and around to the other cup. Bind off.

Back straps and under border: With white, ch 50, starting at the bottom of the RS front right cup. SC across the bottom of both cups, ch 50, bind off.

With Green, DC in each of the white SC. Bind off.

Add accents: With black and an embroidery needle, add “seeds” wherever you see fit. Feel free to follow my placement in the photos above as a guide.

More Adult Crochet Patterns You’ll Love

If you enjoyed this crochet watermelon bikini, you’ll find more pretty patterns sized for grown-ups in my adult patterns collection. A few favorites for warm weather and easy weekend makes:

• Easy Boho Granny Square Tote Bag — the perfect summer beach companion to carry everything you need
• Browse all adult crochet and knit patterns
• More free patterns to try

Get the Printable PDF Pattern

Want to skip scrolling and have the full pattern in a beautifully formatted, ad-free PDF you can take to the beach? Grab the printable Crochet Watermelon Bikini Pattern from my Etsy shop and use code SEELOVE15 for 15% off your order.

Take pics, post them below, and tag @seeloveshare on Instagram — I love seeing your finished makes! 🍉