21 Free Crochet Bikini Patterns (Tops, Bottoms & Full Sets)
There is something genuinely magical about wearing a swimsuit you made yourself. It fits exactly the way you want it to, it reflects your personal style, and every time someone asks where you got it, you get to say those four satisfying words: “I made it myself.” Crochet bikinis have been having a moment for years now, and they show absolutely no signs of slowing down. From cottage-core inspired triangle tops to modern high-waisted bottoms and full matching sets that look like they came straight from a boutique, the world of free crochet bikini patterns is rich, varied, and surprisingly accessible — even if you are still building your skills.
Whether you are heading to a tropical beach, spending lazy days at a backyard pool, or just want a new summer project that feels exciting and wearable, this collection has something for you. We have gathered 21 of the best free crochet bikini patterns available online, organized by category so you can easily find exactly what you are looking for. Each one has been chosen for its clear instructions, beautiful finished result, and — most importantly — the fact that it will not cost you a cent to access.
Before we dive in, a few quick notes. Most crochet bikinis are designed to be worn over a swimsuit or with a lining sewn in, since crochet fabric is not waterproof and can stretch when wet. Pay attention to yarn recommendations for each pattern; cotton and cotton-blend yarns tend to hold their shape best in water and are far more comfortable against the skin than acrylic. And always, always make a gauge swatch. Swimwear needs to fit well, and a few extra minutes at the start can save you from a frustrating do-over at the end.
Now, let us get into the good stuff.
Free Crochet Bikini Top Patterns
The top is usually where people start when they first venture into crochet swimwear, and for good reason. A well-made crochet bikini top is versatile enough to wear at the beach, layered over a bandeau, or even styled with high-waisted shorts for a day out. These patterns range from beginner-friendly triangles to more structured designs with cups and underwire channels.
1. Classic Triangle Bikini Top
The triangle bikini top is the quintessential summer staple, and this free pattern makes it beautifully approachable. Using simple half double crochet stitches worked in rows, the triangles are constructed from the bottom up with ties attached at each side. The pattern includes multiple size options and detailed instructions for adjusting the cup size by adding or removing rows. Worked in cotton yarn, this top dries quickly and holds its shape throughout a day at the beach. Find this pattern on Ravelry by searching for “classic triangle crochet bikini top” and filtering by free patterns.
2. Shell Stitch Bikini Top
If you want a little more texture and visual interest, the shell stitch bikini top is a stunning choice. The repeating fan or shell pattern creates a scalloped edge along the bottom of each cup that looks intricate but works up surprisingly quickly once you get the rhythm of the stitch. This pattern also includes a halter tie option and a band option, giving you flexibility in how the finished top fits and functions. It is ideal for someone who has crocheted a few basic projects and is ready to try a slightly more decorative stitch.
3. Bandeau Bikini Top
The bandeau style has surged in popularity because it offers full coverage, pairs beautifully with high-waisted bottoms, and is incredibly flattering on a wide range of body types. This free crochet bandeau pattern uses a combination of single crochet and mesh stitches to create a lightweight, stretchy band with optional removable ties that can be worn around the neck for extra support. The mesh sections add a bohemian touch while keeping the overall look clean and modern. This is a great pattern for intermediate crocheters who are comfortable working in the round.
4. Crochet Bralette Top
Not quite a bikini top in the traditional sense, the crochet bralette crossover has become one of the most searched swimwear styles in recent years. This free pattern creates a structured bralette with adjustable straps, a back closure, and enough coverage to wear confidently in the water or as a standalone crop top. The pattern uses a tight gauge with fingering-weight cotton yarn to ensure the fabric stays opaque when wet. Instructions for adding elastic along the band are included, which significantly improves both the fit and the longevity of the piece.
5. Crochet Halter Crop Top
This pattern straddles the line between swimwear and everyday fashion, which makes it one of the most versatile on this list. The halter crop design features a high neckline, removable padding option, and a self-tying back that makes it easy to customize the fit. It works up in simple rows of double crochet with a textured linen stitch variation available as a modification in the comments section of the original post. Beginner-friendly with clear photo tutorials included.
6. Boho Macramé-Inspired Bikini Top
For those who love the look of festival fashion, this open-work crochet top inspired by macramé knotting is an absolute stunner. The pattern uses a combination of chains, slip stitches, and long double crochets to create a geometric open pattern that provides coverage while remaining airy and lightweight. This one is best worn over a lined bandeau or bralet for modesty, and it is unquestionably a conversation starter. It is rated intermediate to advanced due to the need to keep careful count of the mesh pattern rows.
7. Underwire Crochet Bikini Top
One of the more technically impressive free patterns available, this design includes an underwire channel crocheted directly into the base of each cup, allowing you to insert a standard bra underwire for additional support and shape. The construction method is clever and well-explained, and the finished top looks remarkably polished. If you have always shied away from crochet swimwear because you need more support, this pattern was made with you in mind. Worked in a 4-ply cotton with a 3mm hook.
Free Crochet Bikini Bottom Patterns
Crochet bikini bottoms require a bit more attention to fit and coverage than tops, but a well-constructed pair can be just as comfortable and beautiful as anything you would find in a store. These patterns cover everything from classic briefs to high-waisted silhouettes and cheeky cuts.
8. Basic Crochet Bikini Brief
This is the pattern to start with if you have never crocheted swimwear bottoms before. Worked in the round from the waistband down, the construction is intuitive once you understand the shaping logic, and the pattern includes detailed notes on how to adjust for different hip-to-waist ratios. A single crochet fabric worked at a tight gauge keeps the piece opaque and gives it enough structure to sit smoothly against the body. The ties at each hip are long enough to adjust fit and double as a decorative detail.
9. High-Waisted Crochet Bikini Bottoms
High-waisted bottoms are arguably the most flattering silhouette for a wide variety of body types, and this free pattern captures that retro-modern aesthetic beautifully. The pattern features a deep waistband worked in ribbed single crochet that provides a snug, smooth fit, with the body of the bottom transitioning into a slightly more open stitch pattern for visual interest. Available in sizes XS through XL with detailed modification notes for larger sizes.
10. Crochet Cheeky Bikini Bottoms
For those who prefer a more minimal coverage at the back, this cheeky bikini bottom pattern delivers a clean, modern silhouette. The shaping is achieved through strategic increases and decreases worked in rows of half double crochet, and the adjustable side ties make it easy to achieve a custom fit. The pattern is straightforward enough for confident beginners and works up in a weekend. Multiple color suggestions and stripe variation ideas are included in the pattern notes.
11. Crochet Boy Shorts
On the other end of the spectrum, crochet boy shorts offer full coverage with a sporty, playful look. This free pattern uses a moss stitch variation that creates a dense, stretchy fabric perfect for swimwear. The waistband includes an option to add elastic for extra security, and the leg openings are finished with a simple slip stitch border that prevents stretching or rolling. This is a great choice for those who want to feel fully covered while still rocking handmade swimwear.
12. Brazilian Bikini Bottom
A little bolder, a little more beachy. This Brazilian-cut bikini bottom pattern features a minimal back coverage design with a ruched center seam that creates a flattering, lifted appearance. The construction uses continuous rounds of tight single crochet with thoughtfully placed decreases at the seat. The pattern includes a lining tutorial using stretch swimwear fabric, which is highly recommended for this style.
13. Crochet Swim Skirt
Not everyone wants a traditional bikini bottom, and this crochet swim skirt pattern is perfect for those who want a little more coverage and a lot more style. The skirt is worked in a flowing shell stitch that moves beautifully in and out of the water, and it is designed to layer over a basic swim brief or board shorts. Available in mini and midi lengths, this pattern is a lovely addition to any handmade swimwear collection.
Free Crochet Bikini Full Set Patterns
Sometimes you want the whole look, fully coordinated and made entirely by hand. These full set patterns provide instructions for both the top and the bottom in one place, ensuring a seamless color match and a cohesive finished result. Several also include cover-up or bag patterns as bonus add-ons.
14. The Seashore Matching Set
One of the most popular free crochet bikini patterns on Pinterest, the Seashore set features a triangle top and matching tie-side brief worked in a linen stitch that gives the finished pieces a slightly woven appearance. The texture is beautiful in solid neutral colors like cream, sand, or sage green. The pattern is well-written with stitch counts for each size clearly labeled, and the instructions for joining the tie straps are particularly thorough. Ideal for intermediate crocheters.
15. Retro High-Neck Bikini Set
This pattern takes its inspiration from the high-neck swimwear styles of the 1960s and 70s. The top features a modest scoop neck with a racerback tie and full cup coverage, while the bottoms are cut high at the hip for a vintage silhouette. Worked predominantly in rows of half double crochet with a textured basket weave variation on the top, this set feels substantial and well-constructed. The designer includes notes on blocking, which makes a significant difference in the drape and appearance of the finished pieces.
16. Boho Tassel Bikini Set
If you want your handmade swimwear to look like it came from a festival market stall in the best possible way, this is your pattern. The boho tassel set features an open-weave top with dangling tassel ties and matching bottoms with tassel hip details. The overall construction is simpler than it looks, relying on a basic mesh stitch for both pieces, with the tassels added at the end as a finishing detail. The pattern includes instructions for making your own tassels from leftover yarn.
17. The Minimalist Maillot-Inspired Set
This unique pattern defies easy categorization — it is technically two separate pieces that snap together at the sides to create a one-piece appearance, or wear them separately as a traditional bikini. The snap closure technique is explained in detail and uses standard plastic snaps sewn through the crochet fabric. The stitch pattern is a clean, dense single crochet worked in a sophisticated matte cotton, and the overall aesthetic is very editorial. This one requires intermediate to advanced skills.
18. Striped Summer Set
Color blocking and stripes are perennially on trend in swimwear, and this free pattern makes it easy to incorporate both into a crochet bikini set. The pattern uses the tapestry crochet technique to carry colors as you work, creating clean horizontal stripes in two or three colors. The top is a bandeau style, and the bottoms are a classic brief cut. A full color chart and tips for managing multiple yarn strands simultaneously are included, making this a great introduction to tapestry crochet if you have not tried it before.
19. Lace Overlay Bikini Set
This set takes a layered approach: the base pieces are simple solid-stitch construction designed for opacity and fit, while a separate lace overlay panel attaches to the front of both pieces for a romantic, ethereal look. The overlay uses a traditional granny square variation reworked into rectangular panels, and the technique for attaching them is clearly illustrated. This is one of the most visually impressive patterns on this list and photographs beautifully.
20. The Surfer Girl Set
Designed with active beachgoers in mind, the Surfer Girl set prioritizes security and coverage without sacrificing style. The top is a sporty pull-over style with no ties — just a wide back band and a scooped neckline — while the bottoms feature a wide waistband and full coverage seat with optional shorts overlay. The pattern uses a tight gauge and includes detailed instructions for adding swimwear lining throughout. If you love the water but worry about wardrobe malfunctions, this set was designed with exactly that concern in mind.
21. The Market Set with Matching Bag
Saving one of the most delightful finds for last: this full pattern pack includes a triangle bikini set plus a coordinating mesh market bag, all in the same stitch pattern and yarn so everything matches perfectly. The top and bottoms are clean and classic, but the real star is the mesh bag, which uses the same open-work stitch in a slightly looser gauge that makes it ideal for carrying sunscreen, a book, and a towel. The bag uses just a fraction of the yarn left over from the swimwear, making this a gloriously efficient use of your materials.
Tips for Making Your Crochet Bikini Last
Once you have finished your handmade masterpiece, a little care will help it last for many seasons.
Rinse your crochet bikini in cool fresh water immediately after swimming in chlorinated or saltwater pools. Both can degrade natural fibers over time if left to dry in them. Hand wash gently with a mild soap or specialized wool wash, and never wring the fabric — press it gently between a clean towel to remove excess water. Lay it flat to dry in the shade, since direct sunlight can fade colors and weaken cotton fibers more quickly than you might expect.
Store your bikini flat or loosely rolled rather than stuffed into a drawer. Crochet fabric has a long memory, and pieces that are stored crumpled can develop permanent creases that are difficult to block out later.
If you notice a stitch beginning to unravel, address it immediately. A small darning needle and a few minutes of attention can save a piece that would otherwise fall apart. Keep a small length of the original yarn somewhere safe for exactly this kind of repair.
Getting Started: What You Need
For most of the patterns in this collection, you will need a 3mm to 4mm crochet hook, a good quality cotton or cotton-blend yarn in the weight specified by the pattern, a yarn needle for weaving in ends, scissors, stitch markers, and a measuring tape. Some patterns also call for swimwear elastic, plastic snaps, bra underwire, and fabric for lining, all of which are readily available at fabric and craft stores.
If you are choosing your own yarn rather than following a specific recommendation, look for yarns labeled as cotton, linen-cotton blend, or bamboo cotton. These fibers hold their shape when wet, dry quickly, and feel soft against the skin. Avoid 100% acrylic for swimwear — it can feel uncomfortably sticky when wet and does not breathe well in warm weather.
Final Thoughts
Crochet swimwear is one of those projects that rewards patience and attention to detail with something genuinely beautiful and personal. The 21 free patterns in this collection represent a wide range of styles, skill levels, and aesthetics, so whether you are a beginner working up your first triangle top or an experienced crocheter ready to tackle an underwire bandeau with tapestry stripes, there is something here to inspire your next cast on.
Start with the pattern that excites you most, take your time with gauge and sizing, and enjoy the process. There are few things better than stretching out on a beach towel in the sunshine wearing something you made entirely yourself. Happy crocheting.
