Crochet Bikini Pattern | Handmade Boho Swimwear Set for Summer Beach Style
There is something undeniably magical about wearing something you made with your own hands. When that something happens to be a beautifully crafted crochet bikini, the magic doubles. Handmade swimwear has been having a major moment in the boho fashion world, and honestly, it makes perfect sense. Nothing captures the free-spirited, sun-soaked energy of summer beach style quite like a textured, crocheted bikini set that you designed and created yourself.
Whether you are a seasoned crocheter looking for your next exciting project or a confident beginner ready to level up your skills, this crochet bikini pattern guide will walk you through everything you need to know — from choosing the right yarn and hook to assembling a gorgeous set that will turn heads on the shoreline. By the end, you will have all the knowledge and inspiration you need to make your own handmade boho swimwear set for summer.
Why Crochet Bikinis Are the Ultimate Summer Project
Before we dive into the pattern itself, let’s talk about why making your own crochet bikini is such a rewarding idea.
First, there is the fit. Store-bought swimwear is notoriously difficult to size correctly. Tops and bottoms often come in separate sizes, but finding a set that fits your unique measurements as a ready-to-wear product is a different story. When you crochet your own bikini, you are in complete control. You adjust the measurements to your own body, choose how much coverage you want, and create something that genuinely flatters your figure in ways that mass-produced swimwear rarely does.
Second, there is the sustainability angle. Fast fashion swimwear is one of the more environmentally costly sectors of the clothing industry. Handmade crochet pieces are made with intention, typically from smaller quantities of material, and they last far longer when cared for properly. Many crochet enthusiasts also choose natural or recycled fibers, making their projects even more eco-conscious.
Third — and perhaps most importantly — there is the sheer joy of it. Summer is a season of creativity and freedom. Spending a few evenings working through this pattern, holding the finished product, and then wearing it on a beach you love? That is an experience that no online shopping cart can replicate.
What You Will Need Before You Start
Getting your materials together before you begin is always the best approach. Here is a complete list of what you will need for a standard crochet bikini set.
Yarn: This is the most important choice you will make. For swimwear, you want a yarn that holds up to water, dries quickly, and has a bit of stretch. Cotton yarn is the classic choice — it is breathable, soft against skin, and widely available. Look for a lightweight cotton yarn in size 3 (light/DK weight) or a cotton-blend yarn that includes a small percentage of nylon or polyester for added durability and stretch. Nylon thread yarn is another excellent option and gives your bikini a more refined, delicate look. For a boho aesthetic, a natural cotton in a cream, sand, terracotta, or sage green colorway works beautifully.
Crochet Hook: A size 2.5mm to 3.5mm hook works well for most cotton swimwear yarn. The exact size depends on your yarn weight and your personal tension. Always check your gauge before beginning the main pieces.
Elastic: You will need thin swimwear elastic for the waistband of the bottoms and optionally for the back band of the top. Look for 5mm or 6mm elastic that is designed for swimwear — it is chlorine and water resistant.
Scissors and a Tapestry Needle: For finishing your work and weaving in ends neatly.
Stitch Markers: These are your best friend when working in rounds.
Measuring Tape: Essential for checking gauge and taking your body measurements.
Lining Fabric (Optional): Some crocheters like to add a fabric lining to the cups of the top and the gusset of the bottoms for added coverage and comfort. A swimsuit lining fabric works perfectly.
Taking Your Measurements
Before you cast on a single stitch, you need your measurements. Take these carefully and write them down.
For the bikini top, you need your bust measurement (the fullest part of your chest), your underbust measurement (directly under your bust), and your cup depth (measured from the top of your shoulder down to your nipple, or from the center of your chest to the fullest point of your bust).
For the bikini bottoms, you need your waist measurement, your hip measurement (the fullest part of your hips and seat), and your desired rise (how high you want the waistband to sit — low-rise, mid-rise, or high-rise).
Write down all of these numbers. You will refer to them throughout the pattern.
Understanding Gauge
Gauge is the number of stitches and rows you get per inch with your chosen yarn and hook. Getting gauge correct is especially important for swimwear because the fit is everything. If your gauge is off, your finished bikini will be too big or too small.
For this pattern, a good target gauge using size 3 cotton yarn and a 3mm hook is approximately 22 stitches and 24 rows equal 4 inches in single crochet. Work a swatch at least 5 inches square, wash and dry it (since cotton can change slightly when wet), and measure again before deciding whether to adjust your hook size.
If your swatch has too many stitches per inch, go up a hook size. If it has too few, go down a hook size. This step feels tedious but it is genuinely the difference between a bikini that fits and one that does not.
The Bikini Top Pattern: Triangle Style
The triangle bikini top is the most iconic boho swimwear silhouette. It is flattering, adjustable, and works beautifully in crochet. This pattern creates two triangular cups connected by ties that go around the neck and around the back.
Foundation: Begin by creating a slip knot and chaining the number of stitches that corresponds to the base of your triangle. For a medium cup size, chain 30 and turn.
Row 1: Single crochet across, turn. (30 stitches)
Row 2: Chain 1, single crochet 2 together at the beginning of the row, single crochet to the last 2 stitches, single crochet 2 together, turn. (28 stitches)
Continue decreasing one stitch at each end of every row in this way until you have just 2 stitches remaining. You now have a triangle. Fasten off and weave in ends. Make two of these — one for each cup.
Adding Texture: For a more boho feel, you can work the body of the cups in a simple mesh pattern instead of solid single crochet. After your foundation chain, work alternating chain-1 spaces and single crochets across each row, maintaining the same decrease pattern at each edge. This creates that gorgeous, open-weave look that is so characteristic of handmade crochet swimwear.
The Ties: For the neck ties, rejoin your yarn at the top corner of one cup and chain approximately 80 to 100 stitches (depending on how long you want your ties). Slip stitch back along the chain to reinforce it, then fasten off. Repeat on the other cup. For the back band, you can work a crocheted tie in the same way, connecting the bottom corners of both cups, or you can thread swimwear elastic through a row of chain-1 spaces worked along the bottom edge of each cup.
Side Ties: For a more adjustable and stylish boho look, add separate ties to the outer bottom corners of each cup rather than a fixed back band. These allow you to tie the top loosely in the back, adjust the fit, and create that effortlessly relaxed triangle top silhouette.
Finishing the Cups: Once both cups are complete with all ties attached, hold them together and join the inner edges with a few slip stitches or a short seam. Alternatively, you can leave them separate and let them naturally meet when tied — this is the more common boho approach and requires no seaming at all.
Adding Boho Details to the Top
This is where you can make the pattern truly your own. Here are some ways to add beautiful, bohemian details to your bikini top.
Fringe: Cut 4-inch lengths of yarn and fold them in half. Use your crochet hook to pull them through the stitches along the bottom edge of each cup, creating a fringe. Trim evenly for a polished look.
Shell Stitch Border: Work a row of shell stitches (five double crochets into a single stitch, skip two stitches, single crochet, skip two stitches, repeat) along the top edge or bottom edge of each cup for a pretty, scalloped finish.
Tassels: Attach small yarn tassels to the ends of the neck ties and back ties. These sway beautifully as you move and add a distinctly handmade, artisanal touch.
Color Blocking: Work the first half of the triangle in one color and the second half in another, or make each cup a different color. This is a bold, playful look that photographs beautifully against ocean and sand.
The Bikini Bottoms Pattern: Classic Brief Style
The bikini bottoms are worked in a simple but effective construction that creates a comfortable, adjustable fit.
The Front Panel: Chain a number of stitches equal to your desired front panel width at the hip. For most sizes, this is somewhere between 28 and 40 stitches depending on your gauge and your hip measurement. Work in single crochet, increasing one stitch at each end every few rows to create a slight curve that follows the shape of the hip. Work until the panel reaches your desired rise height.
The Back Panel: The back panel is worked the same way but slightly taller and with a bit more width at the top to ensure coverage and comfort. Increase at the edges more aggressively than the front panel — adding a stitch at each end every other row rather than every few rows — to create a shape that accommodates the curve of the seat.
Joining the Panels: With the front and back panels complete, join them at the sides with a crocheted seam or by working a row of single crochet through the corresponding stitches on each panel. Leave the top edges open for the waistband.
The Gusset: Cut a small rectangle of swimsuit lining fabric and hand-stitch it to the inside of the crotch area. This is not optional — it is what makes your bottoms actually wearable as swimwear. Make sure it is secured neatly on all four sides.
The Waistband: Thread your swimwear elastic through a channel along the top edge of the bottoms. To create the channel, work two or three rows of single crochet along the top, then fold them over and slip stitch down to create a small tunnel. Thread the elastic through, sew the ends together securely, and let the waistband relax into place.
Side Tie Alternative: If you prefer the look of tie-side bottoms (and for boho style, you probably do), skip the waistband entirely. Instead, finish the side edges of your front and back panels with a row of single crochet, then add long chains to each of the four upper corners. These become your ties. Knot them at your hips for an adjustable, ultra-boho look. This style also photographs spectacularly on the beach.
Caring for Your Crochet Bikini
Handmade swimwear requires a little extra attention to keep it looking its best, but the care routine is simple once you know it.
Always rinse your bikini in cool, clean water immediately after wearing it in the ocean or a pool. Salt water and chlorine can break down cotton fibers over time, so rinsing promptly significantly extends the life of your piece. Wash gently by hand using a mild detergent — never machine wash or machine dry a handmade crochet garment if you can help it. Lay it flat to dry in the shade rather than in direct sunlight, which can fade the yarn color.
Never wring out a crochet bikini. Instead, gently press excess water out by rolling the piece in a clean towel and pressing lightly. Store it flat or loosely rolled rather than folded to prevent creasing.
Styling Your Handmade Boho Crochet Bikini
The beauty of a handmade boho bikini is that it exists at the intersection of beachwear and fashion. There are so many ways to style it beyond just wearing it in the water.
Over a flowy linen midi skirt with strappy sandals, your crochet bikini top becomes a festival-worthy crop top. Pair it with high-waisted denim shorts for a beach bar look. Layer it under a sheer beach cover-up dress for an effortlessly layered, textured outfit. Add a wide-brimmed straw hat, some shell jewelry, and a woven tote bag and you have the complete bohemian summer aesthetic.
On the beach itself, the crochet set pairs beautifully with a sarong tied at the hip. Choose fabrics in warm, earthy tones — terracotta, rust, golden yellow — to complement neutral yarn colors, or go bold with vibrant botanical prints against a cream crochet set.
Tips for Making This Pattern Your Own
The best thing about working from a pattern like this is that it is a framework, not a restriction. There are endless ways to personalize your handmade boho swimwear.
Consider incorporating different stitches for texture — the bobble stitch, the waffle stitch, or the granny square construction all make stunning bikini tops. You can work a full granny-square bikini by making small squares and joining them together, which is a beloved boho approach with serious visual impact.
Try dyeing your own yarn using natural plant-based dyes before you begin crocheting. Indigo, turmeric, avocado pits, and hibiscus all produce gorgeous, wearable colors that no commercial yarn can quite replicate.
If you are making this set as a gift, take the recipient’s measurements carefully and consider adding a monogram or initial worked into the cups of the top using a simple tapestry crochet technique.
A Note on Confidence and the Process
If this is your first wearable crochet project, it is completely normal to feel a little intimidated. Swimwear is more technically demanding than a scarf or even a sweater, because fit matters so much and because the piece has to function in water. But the skills involved — single crochet, decreasing, chaining, and finishing — are fundamentals that any crocheter at an intermediate level already has.
Give yourself time. Work the gauge swatch. Trust the measurements. Make the cups before you commit to the ties so you can hold them up and check the size before you finish. And most importantly, be proud of what you are creating. Every stitch in this bikini is yours, and wearing it on a warm summer day is one of the most satisfying feelings the craft of crochet has to offer.
The beach is waiting. Your hook is ready. Let’s make something beautiful.
