26 Free Crochet Swimsuit Patterns for Summer
Crochet swimwear turns a small amount of yarn into something you wear all summer. A bikini top eats maybe 150 yards, so if the fit is off you have lost an afternoon, not a month.
Below are 26 free crochet swimsuit patterns and design directions — bikinis, one-pieces, motif sets, kids’ sizes, fringed cover-ups — each with a note on what it actually asks of you. Read the gauge section first.
Yarn and Gauge: The Part That Decides Everything
Cotton is the standard choice, but it stretches when wet and stays stretched. A cotton and nylon blend, or cotton worked alongside fine elastic thread, gives the same look with recovery built in. Skip acrylic entirely: it holds water, sags under its own weight and pills within a season.
- Go down one hook size from the ball band — a tight fabric is the whole point.
- Swatch, soak the swatch, measure it wet. Dry gauge tells you nothing here.
- Line the cups and gusset on anything with visible chain spaces.
- Weave ends in twice, in opposite directions. Water works loose ends free.
Still building confidence with tension? A few smaller crochet project ideas make better practice — swimwear is unforgiving of loose stitches in a way a scarf never is.
26 Free Crochet Swimsuit Patterns and Ideas
1. Scalloped Shell-Stitch Bikini in Dusty Teal
The scallop is a shell edging worked as a final round; every shell needs the same stitch count or the curve wanders. Side ties skip the hip measurement.
2. Rainbow Ruffle Bandeau with Skirted Bottoms
The flare comes from a second pass into the front loops only, two or three stitches into each one below. That brim uses the same trick — one of the simpler crochet hat ideas to match a set.
3. Mandala Motif Halter Bikini
Block every motif to the same diameter before joining. Skip that and the seams pull crooked, which shows immediately across a curved bust.
4. Bold Granny-Circle Two-Piece
Size these by counting motifs, not inches: pick a circle diameter first and let the maths follow. The gaps between circles are structural, so line it.
5. Pastel Lace Bandeau and Mint High-Waist Bottoms
Wet cotton drops. A strapless band is held up entirely by tension, so work it tighter than feels comfortable and drop a hook size.
6. Kids’ Pastel Ruffle Set
Child sizes are the fastest way to test a swimwear pattern before committing to an adult one — an evening’s work. Line the top or it rides up.
7. Rainbow Stripe Ruffle Bikini
Carry the yarn up the side seam rather than cutting at every colour change. Twelve stripes is twenty-four ends otherwise, and ends work loose in water.
8. Cream Pineapple-Lace Crop and Briefs
Pineapple lace is built from chain spaces, and chain spaces grow when wet. Work a full size down and let it relax into the size you wanted.
9. Fringed Pastel Stripe Set with Sun Hat
Cut every fringe strand around the same piece of card so the hem stays level, then trim once at the end instead of as you go.
10. Flower-Motif Halter with Mesh Skirt
Sew the appliqué flowers down all the way round, not at the centre — one tacked at a single point flips in water. These crochet flower patterns suit the motifs.
11. Rainbow Mesh Tie-Front Bikini
A front tie absorbs a size either way. Reinforce the two anchor points with slip stitch — that is where the strain lands every adjustment.
12. Colourblock Patchwork Triangle Bikini
Each block is a separate triangle joined at the edges, so it reads as patchwork, not stripes. Thread the strap beads on before the final row.
13. Fringed Tropical-Print Bikini
Fringe adds weight, and weight drags a triangle top down. Work the cup dense and keep strands short enough to swing rather than pull.
14. Kids’ Rainbow Stripe Swim Dress
A bandeau body with a skirt gathered at the hip — far more practical for a child than a two-piece. The two-colour hem ruffle is a single round, alternating every few stitches.
15. Sunset Mesh Triangle Bikini
The tie under the bust does the real work of holding the cups. Make it longer than you think you need — trimming is easy, adding is not.
16. Black Openwork Mesh Set
Dark yarn swallows stitch definition, so mark every tenth row instead of counting by eye. The payoff: black openwork stays opaque wet where pale will not.
17. Open-Mesh One-Piece with Scoop Back
That deep scoop needs a firm single crochet edging at tighter tension than the body, or the back sags into a curve you never designed.
18. Rainbow Top with High-Leg Teal Bottoms
Tie-side bottoms sit wherever you put them, the one shape that fits everybody. The mismatched top is deliberate: two leftover yarn lots, one swimsuit.
19. White Tight-Stitch Bralette and High-Waist Brief
Tight single crochet rather than lace, so the fabric is opaque unlined. Slower and hungrier on yarn, but the one you can swim in without thinking.
20. Rainbow Bandeau and Ruffled Skirt
The skirt is a straight tube with three increase rounds near the hem — that is all the flare takes. Over plain bottoms it doubles as a cover-up.
21. Sea-Glass Picot-Edge Set
Picot is chain three, slip stitch back into the same stitch. Space them every third stitch and the edge looks intentional; by feel, it looks like a mistake.
22. Striped Tie-Front Top with Long Skirt Panel
Vertical stripes mean the piece is worked sideways, ninety degrees from how you would build a top. The same trick appears in these crochet shorts patterns.
23. Hibiscus Print Fringe Set
Two fringe lengths, two jobs: short under the bust for movement, long at the hip as a skirt. Knot the hip fringe through a foundation chain so it can be replaced.
24. Textured Puff-Stitch Black Bandeau
Puff stitches give the band grip as well as texture — a textured bandeau stays put where a smooth one slides. Keep the bottoms plain.
25. Pastel Open-Mesh Halter Set
Airy and completely sheer — a lounging set, not a swimming one, unless you line it. The scalloped hem goes on last, so add or skip it after trying them on.
26. White Textured Bandeau and Mesh High-Waist Brief
A solid textured band against an open mesh brief is the easiest pairing to improvise from leftovers, and the high waist gives you something sturdy to sew a lining to.
Finishing and Care
Ties, halter joins and where the cups meet the band are the three places crochet swimwear fails. Each takes five minutes to reinforce with slip stitch. Do all three.
Rinse in cold fresh water after every swim; salt and chlorine both break cotton down. Press the water out in a towel rather than wringing, then dry and store flat. Hanging a wet crochet top is how a bandeau becomes a tube.
Accessories are quick wins after that: a crochet beach bag in the same dye lot, or something longer from these crochet dress patterns to throw over the top.
Frequently Asked Questions
What is the best yarn for a crochet swimsuit?
A cotton and nylon blend in DK or sport weight. Pure cotton looks better but stretches permanently once wet; the nylon pulls it back. If your yarn has no stretch, run elastic thread through the band and leg openings.
Do crochet swimsuits stay on in the water?
Yes, if the gauge is tight and the piece is lined. Dense single crochet behaves like any other swimsuit. Open mesh and lace stretch, go sheer and shift — line those, or keep them poolside.
How much yarn does a crochet bikini need?
Roughly 200 to 350 yards of DK cotton for an adult two-piece. Motif-heavy crochet two-piece sets run higher because of the joining; anything skirted or fringed, closer to 500. Buy a spare ball in the same dye lot.
Can a beginner crochet a swimsuit?
A triangle bikini top is beginner-level: two triangles and four ties. Motif designs are harder — not the stitches, but joining dozens of circles evenly. Blocking practice on flat crochet granny squares pays off directly.
