Summer is the season when your crochet hook gets the most love, and 17+ crochet bikinis free patterns are exactly what you need to turn that extra skein of cotton yarn into something you’ll actually wear to the beach. Handmade swimwear has become one of the most-saved categories on Pinterest, and it’s easy to see why. Each piece looks like a boutique find, but you can make it yourself for the cost of a few balls of yarn and a weekend afternoon.
This roundup gathers free patterns ranging from simple triangle tops perfect for your first swimwear project to detailed granny-square sets for crocheters ready for a challenge. You’ll find notes on yarn weight, hook size, and skill level for every design, so you can pick the one that matches your experience and your next vacation.
1) Adjustable Triangle Bikini Set With Tie-Side Bottoms
This classic silhouette features triangle cups and matching tie-side bottoms, giving you full control over fit and coverage. Solid, sun-washed colors like coral, mustard, or sage look especially charming in this shape, and the simple triangle form shows off any stitch texture you choose. The adjustable ties at the shoulders, back, and hips make it one of the most forgiving designs for a first swimwear attempt.
Worsted weight cotton yarn works best here, paired with a size G or H hook. Basic single crochet and double crochet rows build the triangles quickly, with simple chain ties finishing the edges. Beginners can finish this set in a weekend, and it styles beautifully layered under a crochet cover-up or sarong.
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Detail |
Specification |
|---|---|
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Yarn Weight |
Worsted weight cotton |
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Skill Level |
Beginner |
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Estimated Time |
Weekend project |
2) Scoop-Neck Crochet Bikini Top With Wide Shoulder Straps
A soft scoop neckline and wide shoulder straps give this top a supportive, athletic look that still feels feminine. Cream, blush, and soft taupe tones highlight the clean rows of stitching, making it a versatile piece that pairs with almost any bottom in your wardrobe. The wider straps add comfort for days spent swimming or lounging poolside.
Cotton or a cotton-acrylic blend in worsted weight holds its shape well under the extra strap width. Single crochet rows form the body, while the straps use a sturdy double-stranded chain for durability. This is an easy-to-intermediate project, ideal for makers who already know basic increases and decreases for cup shaping.
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Detail |
Specification |
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Yarn Weight |
Worsted weight cotton blend |
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Skill Level |
Easy |
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Estimated Time |
3-4 hours |
3) Retro High-Waisted Bikini Bottoms With Full Coverage
High-waisted bottoms bring a retro, pin-up inspired silhouette back into style, offering more coverage through the hips and tummy. Rich jewel tones like emerald or burgundy give this piece a vintage swimwear feel, while the fitted waistband adds structure without feeling stiff. It’s a flattering option for makers who want comfort alongside style.
A firm worsted weight cotton yarn keeps the waistband from sagging, worked with a size G hook for tight, even stitches. Rows of half double crochet create a smooth fabric, with elastic thread woven through the waist edge for extra support. This intermediate project rewards patience with a bottom you’ll reach for all season.
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Detail |
Specification |
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Yarn Weight |
Worsted weight cotton |
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Skill Level |
Intermediate |
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Estimated Time |
4-5 hours |
4) Scalloped Shell-Stitch Halter Bikini Top
Delicate scalloped edges created with the shell stitch give this halter top a romantic, lacy finish. Pastel shades like lilac or seafoam green bring out the texture of each shell row, making this one of the prettiest options on this list for photos. The halter neckline adds extra support for the bust.
A light worsted or DK weight cotton yarn works well with a size F or G hook to keep the shells crisp and defined. The shell stitch repeats in rows across the cups before tapering into the halter strap, a straightforward technique once you’ve practiced the pattern once or twice. This intermediate design is a lovely gift for a crochet-loving friend heading on vacation.
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Detail |
Specification |
|---|---|
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Yarn Weight |
DK or light worsted cotton |
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Skill Level |
Intermediate |
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Estimated Time |
3-4 hours |
5) Longline Crochet Bralette With a Lace-Up Back
The extended band on this bralette-style top offers extra torso coverage and a sporty, swimsuit-meets-crop-top look. A lace-up back detail adds visual interest and lets you adjust the fit as you tighten or loosen the cord. Neutral tones like sand or white let the crisscross lacing stand out as the star feature.
Worsted weight cotton gives the band enough structure to hold its shape, worked on a size H hook with rows of double crochet. The lace-up back uses a simple chain cord threaded through spaced stitches, an easy technique even for newer crocheters. Pair it with high-waisted bottoms for a coordinated, beach-ready set.
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Detail |
Specification |
|---|---|
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Yarn Weight |
Worsted weight cotton |
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Skill Level |
Easy |
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Estimated Time |
3-4 hours |
6) Front-Tie Crochet Bandeau Bikini Top
A strapless bandeau shape with a front-tie bow keeps this top simple, sweet, and quick to make. Bright colors like turquoise or hot pink give it a playful, festival-ready look, while the front bow adds a cute focal point. It works well for smaller busts or as a layering piece under a cover-up.
A worsted weight cotton yarn paired with a size G hook produces a dense, supportive fabric using rows of single crochet. The bow ties attach at the center front with simple crochet chains, finished off with knotted tassels for extra flair. This beginner-friendly project is one of the fastest on this list to complete.
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Detail |
Specification |
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Yarn Weight |
Worsted weight cotton |
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Skill Level |
Beginner |
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Estimated Time |
2-3 hours |
7) Daisy Granny-Square Bikini Top With Contrast Borders
Small daisy granny squares joined with a contrasting border bring a cheerful, patchwork charm to this top. White daisy centers against a bold background color like cobalt or coral create a cottagecore-meets-beach aesthetic that photographs beautifully. Each square becomes a mini project in itself before joining.
DK or worsted weight cotton yarn in two or three colors is ideal, worked with a size F or G hook. The daisy motif uses popcorn or puff stitches for the petals, joined with slip stitches and finished with a single crochet border. This intermediate project suits makers who already enjoy granny-square crochet and want to apply it to swimwear.
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Detail |
Specification |
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Yarn Weight |
DK or worsted cotton |
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Skill Level |
Intermediate |
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Estimated Time |
Weekend project |
8) High-Neck Crochet Halter Top With a Mesh Yoke
A high neckline paired with an airy mesh yoke gives this top a modern, fashion-forward silhouette. The open mesh panel across the chest adds a hint of skin-baring detail while keeping the rest of the top modest and secure. Solid black or white yarn lets the lattice pattern of the mesh take center stage.
Fine worsted weight cotton works with a size F hook to create the open filet mesh, using chains and double crochet spaced evenly apart. The solid cups below use tight single crochet rows for coverage and support. This intermediate-to-advanced design suits crocheters comfortable reading a stitch chart.
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Detail |
Specification |
|---|---|
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Yarn Weight |
Worsted weight cotton |
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Skill Level |
Intermediate |
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Estimated Time |
4-6 hours |
9) Color-Block Crochet Bikini Set With Contrast Straps
Bold color-blocking turns this bikini set into a statement piece, with each panel worked in a different bright hue. Contrast straps in a complementary shade tie the whole look together, making it a fun way to use up leftover yarn scraps from other projects. The geometric color breaks give it a modern, graphic edge.
Worsted weight cotton in three or four colors works best, using a size G hook and simple rows of double crochet for clean color transitions. Carrying yarn along the wrong side or weaving in ends neatly keeps the color blocks crisp. This intermediate project is a great way to practice color changes in crochet.
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Detail |
Specification |
|---|---|
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Yarn Weight |
Worsted weight cotton |
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Skill Level |
Intermediate |
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Estimated Time |
Weekend project |
10) Cheeky Crochet Bikini Bottoms With Adjustable Hip Ties
Cheeky coverage with adjustable hip ties makes this bottom a popular pairing for any top on this list. Soft solid colors like terracotta or butter yellow give it a versatile, easy-to-match finish for mixing and matching sets. The tie detail at each hip allows for a custom, snug fit.
Worsted weight cotton yarn with a size G hook creates a fabric dense enough to prevent see-through stretching. Rows of single crochet shape the front and back panels, joined at the sides with long chain ties that double as decorative tassels. This beginner-friendly bottom pattern works up quickly, often in a single sitting.
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Detail |
Specification |
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Yarn Weight |
Worsted weight cotton |
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Skill Level |
Beginner |
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Estimated Time |
1-2 hours |
11) Racerback Crochet Bikini Top With a Wide Underbust Band
A racerback strap design paired with a wide underbust band gives this top extra stability for active days at the pool or beach. Sporty color combinations like navy and white or black and gold play up the athletic shape nicely. The wide band adds support without needing extra padding or lining.
Firm worsted weight cotton yarn worked on a size H hook keeps the band from stretching out of shape over time. Rows of half double crochet build the band, while the racerback straps use a tighter single crochet for durability. This intermediate project suits crocheters who want a secure, swim-ready top.
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Detail |
Specification |
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Yarn Weight |
Worsted weight cotton |
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Skill Level |
Intermediate |
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Estimated Time |
4-5 hours |
12) Crochet Boyshort Bikini Bottoms With a Drawstring Waist
Boyshort-style bottoms with a drawstring waist bring extra coverage and a comfortable, retro-sporty vibe. Striped color combinations in red, white, and navy give this piece a nautical feel that pairs well with simple solid tops. The drawstring waist lets you adjust the fit throughout the day.
Worsted weight cotton on a size G hook creates sturdy fabric for the fuller coverage through the hips and seat. Rows of double crochet form the main body, with a simple eyelet row at the waist for threading the drawstring cord. This intermediate project is a comfortable choice for makers who want more coverage than a traditional bikini bottom.
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Detail |
Specification |
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Yarn Weight |
Worsted weight cotton |
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Skill Level |
Intermediate |
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Estimated Time |
3-4 hours |
13) Pineapple-Lace Crochet Halter Bikini Top
The classic pineapple stitch brings textured, lacy dimension to this halter top, giving it an elegant, almost doily-inspired look. Cream or soft pastel yarn lets the raised pineapple motifs catch the light beautifully. This design stands out as one of the most detailed and eye-catching on the list.
A fine worsted or sport weight cotton yarn pairs well with a size E or F hook to keep the pineapple clusters defined and tight. Each motif builds from a ring of double crochet stitches worked into clusters, repeated across the cup before shaping into the halter strap. This advanced-beginner to intermediate project rewards crocheters who enjoy textured stitch work.
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Detail |
Specification |
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Yarn Weight |
Sport or light worsted cotton |
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Skill Level |
Intermediate |
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Estimated Time |
4-6 hours |
14) One-Shoulder Crochet Bikini Top With a Wide Strap
An asymmetric one-shoulder cut gives this top a fashion-editorial look that stands apart from traditional bikini shapes. A single wide strap crosses over one shoulder, balanced by a fitted band beneath the bust. Solid, saturated colors like crimson or cobalt highlight the clean asymmetric lines best.
Worsted weight cotton yarn on a size G hook creates a firm, supportive fabric for both the band and the wide strap. Rows of double crochet form the base, with short-row shaping to create the asymmetric cup coverage. This intermediate project is ideal for crocheters ready to practice shaping techniques beyond basic increases.
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Detail |
Specification |
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Yarn Weight |
Worsted weight cotton |
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Skill Level |
Intermediate |
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Estimated Time |
4-5 hours |
15) Ruffle-Trim Crochet Bikini Bottoms
A flirty ruffle trim along the waist and leg openings adds playful texture to these otherwise simple bottoms. Soft pink, white, or lavender yarn lets the ruffles stand out as delicate, feminine detailing. This design pairs beautifully with a plain bandeau or triangle top to balance the extra texture.
Worsted weight cotton on a size G hook works for the base, switching to a smaller hook for the ruffle trim to keep it from looking floppy. The ruffle uses multiple double crochet stitches worked into each base stitch, creating natural gathering. This beginner-to-easy project adds a decorative upgrade to a basic bottom pattern.
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Detail |
Specification |
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Yarn Weight |
Worsted weight cotton |
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Skill Level |
Easy |
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Estimated Time |
2-3 hours |
16) Sunburst-Motif Crochet Bikini Top With Joining Panels
Radiating sunburst motifs form each cup on this top, creating a bold, eye-catching centerpiece for any beach outing. Warm gradient colors like orange, yellow, and red worked in rounds mimic an actual sunburst, making this one of the most striking patterns on this list. Joining panels connect the motifs smoothly across the chest and back.
Worsted weight cotton yarn on a size G hook works well for the rounds of double crochet that build each sunburst motif from the center outward. The joining panels use simple single crochet rows to connect the motifs and shape the fit. This intermediate project suits crocheters comfortable working in the round with color changes.
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Detail |
Specification |
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Yarn Weight |
Worsted weight cotton |
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Skill Level |
Intermediate |
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Estimated Time |
Weekend project |
17) Plunging Crochet Monokini With a Geometric Center Panel
A deep plunging neckline paired with a geometric center panel turns this one-piece into a show-stopping option for makers ready for a bigger project. Bold contrasting colors highlight the geometric shapes running down the center, drawing the eye from neckline to hip. This design offers more coverage than a bikini while still feeling striking and swim-ready.
Firm worsted weight cotton on a size H hook holds the structure needed for a one-piece silhouette. The geometric panel uses color-blocked rows of double crochet, while the sides and back use filet mesh for breathability. This advanced project suits confident intermediate crocheters ready to tackle full-body shaping.
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Detail |
Specification |
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Yarn Weight |
Worsted weight cotton |
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Skill Level |
Intermediate to advanced |
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Estimated Time |
Multi-day project |
How to Choose Yarn and Hooks for Crochet Swimwear
Is Cotton or a Swimwear-Specific Blend Better for Your Project?
Cotton yarn is the most reliable choice for crochet swimwear because it holds its shape and handles water better than most acrylic fibers. Mercerized cotton gives stitches a smooth, polished look and dries faster than fuzzy or textured yarns. A cotton blend with a small amount of nylon or spandex adds stretch recovery, which helps a swimsuit keep its fit after repeated wear in the water.
How Do Yarn Weight and Hook Size Affect Coverage?
Worsted weight yarn paired with a smaller-than-recommended hook creates a denser fabric that offers better coverage for swimwear. Going down a hook size or two from what the yarn label suggests tightens up the stitches and closes any gaps that could show skin or become see-through. Looser gauge swatches almost always mean a bikini that stretches out of shape quickly.
Why Is Chunky Yarn Usually Impractical for Swimwear?
Chunky yarn creates bulky, heavy fabric that soaks up water and takes a long time to dry, making it a poor match for swimwear. The thick stitches also tend to stretch and sag once wet, losing the shape you worked hard to crochet. Worsted or DK weight cotton gives a lighter, more swim-appropriate fabric that still works up at a reasonable pace.
Will the Finished Fabric Stretch or Become Transparent When Wet?
Tightly worked stitches in a dense pattern like single crochet resist stretching and transparency better than open lace stitches. A quick swatch test before starting the full project shows how the fabric behaves wet, since cotton can relax and loosen slightly once saturated. Lining delicate or lacy sections with swim-safe fabric or a stretch liner keeps coverage secure even after a swim.
How to Customize Fit, Coverage, and Support
Which Measurements Should You Take Before Starting?
Bust, underbust, and hip measurements form the foundation for any crochet bikini pattern. Taking these measurements snugly with a soft measuring tape, rather than loosely, gives a more accurate gauge swatch comparison. Writing down torso length and desired coverage area helps you adjust row counts for cups, bands, and bottoms before you begin.
How Can You Adjust Cups and Bands Independently?
Working cups and bands as separate pieces lets you size each one to your actual measurements instead of relying on a single fixed pattern size. Adding or removing rows of double crochet in the band changes the underbust fit, while short rows or extra stitches in the cup adjust for bust size. This two-piece construction method appears in most well-written swimwear patterns and makes alterations far simpler.
What Should XS–5XL Makers Check in the Size Instructions?
Patterns written for a range from XS to 5XL should list separate stitch counts and row repeats for each size, not just one set of numbers with vague scaling advice. Checking that the pattern includes a finished measurement chart, not just a size label, confirms the garment will actually fit before you start crocheting. Plus-size makers should also look for guidance on adjusting strap width and band tension for added support.
When Are Lining, Elastic, or Wider Straps Helpful?
Thin elastic thread woven through waistbands and bust bands adds support and prevents sagging after repeated wear. A swim-safe fabric lining behind cups or bottoms adds opacity and structure, especially for lighter colored yarns. Wider straps distribute weight more evenly across the shoulders, which makes a noticeable difference for larger cup sizes or all-day wear.
How to Find and Use the Free Pattern Instructions
Does the Original Designer Offer a Complete Free Pattern?
A complete free pattern includes gauge, materials, finished measurements, and full written instructions from start to finish, not just a photo with a brief summary. Checking that the designer’s own site or blog post includes every section of the pattern avoids frustration partway through a project. Some designers offer the full pattern free with ads, while others require signing up for a newsletter to access the PDF.
Are the Instructions Written in US or UK Crochet Terms?
US and UK crochet terms use the same stitch names for different stitches, so confirming which system a pattern uses prevents major sizing mistakes. A US single crochet is the same stitch as a UK double crochet, for example. Most free patterns state their terminology near the top of the instructions or materials list, so checking there first saves time.
Is the Tutorial Written, Video-Based, or Both?
Patterns that combine written instructions with a video walkthrough tend to be easier to follow for visual learners tackling shaping or motif joining. Written patterns alone work well for crocheters who already read charts and stitch abbreviations comfortably. Looking for a pattern with both formats gives you a backup if a written instruction feels unclear partway through.
Is the Design Intended for Swimming or Dry Beachwear?
Some crochet bikini patterns are designed purely as beachwear accessories meant to be worn over a liner or swimsuit, rather than for actual swimming. The pattern description or designer notes usually clarify whether the piece is swim-safe, lined, or intended as a cover-up style garment. Confirming this detail before starting helps you choose the right yarn and reinforcement techniques for how you plan to wear the finished piece.
