Stitch your way to a breezy crochet triangle bikini top that’s fun, easy, and perfect for sunny beach days and casual summer vibes all season long!

Lightweight Crochet Triangle Bikini Top Pattern for Warm Days

Sunshine and warm weather call for something light and lovely to wear. This small top, made with soft yarn, fits just right with two triangle shapes tied around your neck and back. It’s easy to adjust and feels gentle on your skin. The open, airy stitches help you stay cool while showing off a bit of skin in a tasteful way.

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Perfect for the beach or just outside on a sunny day, this handmade top brings a special charm that makes you stand out without trying too hard. It moves with your body, giving comfort all day long. Pair it with shorts or a skirt, and you’ll have a fresh, cheerful look that brightens any sunny moment. Simple, beautiful, and easy to wear, it’s perfect for enjoying the warmth and fun of summer.

Crochet Triangular Bikini Top Pattern

Special Features

Customizable fit based on bust measurements
Triangular cups with smooth shaping through strategic stitch decreases
Simple double crochet fabric with easy-to-follow decreases
Convenient straps for comfortable wearing
Suitable for layering or standalone summer piece

Level of Difficulty

Beginner to Intermediate

Materials

Acrylic yarn (example: Jungle Green, color 1091)
4 to 4.5 mm crochet hook
Stitch markers (optional)
Scissors
Measuring tape

Pattern Instructions

Step 1: Take Measurements & Chain Foundation

Measure your bust area just under the breasts, slightly stretched towards the back.
Decide how much coverage you want — this determines your initial chain length.
Chain a length equal to approximately one-quarter of your bust measurement, adjusted for desired coverage.
Ensure your chain is an even number, then add 2 extra chains for turning.
Example: For a coverage of ~6 inches, chain 24 + 2 = 26 chains.
Confirm the chain stretches to the desired width.

Step 2: Row 1 – First Double Crochet Row

Skip the first 2 chains (these count as your turning chain).
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Starting from the 3rd chain from the hook, work 1 double crochet (dc) in each chain to the end.
You should have 24 dc stitches excluding the turning chains.
Turn your work.

Step 3: Row 2 – Begin Decreasing for Triangle Shape

Chain 2 (counts as turning chain but not a stitch).
Make 1 dc into the base of the chain 2.
Work double crochet decrease on the next 2 stitches to start shaping the triangle:
- Yarn over, insert hook into first stitch, pull up a loop.
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- Yarn over, pull through 2 loops.
- Yarn over, insert into next stitch, pull up a loop.
- Yarn over, pull through 2 loops.
- Yarn over, pull through all 3 loops on hook (dc2tog).
Continue working dc across the row until you reach last 3 stitches.
On last 3 stitches, repeat the double crochet decrease to reduce 2 stitches at the end.
Turn your work.

Step 4: Repeat Rows 3 and Onward – Continue Shaping

Chain 2, make 1 dc in base of chain 2.
Repeat double crochet decrease on the first 2 stitches of the row.
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Continue with 1 dc in each remaining stitch until last 3 stitches.
Decrease last 2 stitches with dc2tog.
Turn and continue this pattern reducing 2 stitches per row, forming a sharp triangle.
Keep track of stitch count; you should get fewer stitches each row as you shape.

Step 5: Finishing the Triangle Cup

When you have approximately 4 stitches remaining, continue reducing similarly until 3 stitches remain.
Chain 3 (counts as first dc), then make 1 dc in each remaining stitch after that.
Make one final decrease across last stitches for a perfectly shaped triangle point.
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Fasten off yarn and weave in ends.

Step 6: Make and Attach Straps

For the straps, chain 2, then work a dc in first chain, chain 3, and dc in second chain.
Repeat this pattern to desired strap length for adjustable comfort.
Attach straps securely to the top corners of the triangles.
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You may customize strap design and length as preferred (plain chains, picots, or decorative stitches).

Step 7: Optional – Join Triangle Cups at Bottom (for full bikini or bralette)

Chain 3 (counts as first dc),
Attach yarn to end of one triangle cup and work double crochets across bottom edge to join the two cups together.
When transitioning from one triangle to the next, work stitches into both edges together in the same stitch for a neat join.
Ensure joint is even and secure.

Uses

Stylish swimwear bikini top
Summer crop top or layering piece
Custom sized for personalized fit
Great beginner project for learning decreases and shaping in crochet

Tutor’s Suggestions

Use stitch markers to keep track of decreases and turning points.
Measure bust accurately and chain accordingly to get desired coverage.
Keep consistent tension while doing decreases for smooth shape.
Explore yarn colors and textures for varied looks.

Tip

For a neat edge and comfortable fit, make the turning chains without counting as stitches. This avoids buildup and bulky edges.

Conclusion

This triangular crochet bikini top is versatile, beginner-friendly, and perfect for warm weather. With simple double crochet stitches and clear decreases, you can create flattering, customizable swimwear or summer tops.