Wavy Crochet Sweater Pattern with Oversized Fit & Colorful Waves

Want bold texture without complicated stitches? This wavy crochet sweater pairs rhythmic waves with alternating colors for cozy everyday wear.

This wavy crochet sweater gets its character from repeating increases and decreases that create smooth peaks and dips across each panel. Alternating colors row by row makes each wave easier to see while giving the finished crochet sweater playful visual movement and soft, cozy texture.

Sizing stays flexible because front and back panels begin with chain counts based on multiples of 14 plus 3. You can extend or shorten crochet panel rows for your preferred length, while shoulder markers and sleeve placement help create balanced fit before side seams are finished.

Credit Hannah Drapinski

Materials & Tools

• Yarn: Worsted weight yarn, Size 4. Tutorial uses Hobbii Jade, fluffy worsted yarn, with alternating colors for every row.
• Hook: 5.0 mm crochet hook.
• Notions: Tapestry needle, scissors, measuring tape, and stitch markers.

Finished Size & Customization

This sweater is designed around an oversized, boxy fit. Front and back starting chains need multiple of 14 + 3.

For more width, chain in multiples of 14 until your chain reaches past your shoulders for boxy shaping, or continue until it measures shoulder-to-shoulder for a slimmer fit, then add 3 chains.

For more or less length, adjust the number of body rows before flattening the top edge.

Color choices can completely change finished look:

• Greens and creams create an earthy feel.
• Oranges and browns bring retro 70s character.
• Blues and whites create an ocean-inspired palette.
• Alternating colors every row keeps the wave pattern visually defined.

Pattern Abbreviations

• CH: Chain
• SC: Single Crochet
• HDC: Half Double Crochet
• DC: Double Crochet
• DC INC: Double Crochet Increase – place 2 DC in same stitch
• DC2TOG: Double Crochet Two Together – decrease stitch
• ST(S): Stitch(es)

Front and Back Panels – Make 2

Tutorial uses 84 + 3 chains, 87 chains total, creating a boxy fit with 26 rows in length.

Keep chain count within multiples of 14 + 3. Width comes from starting chain, while length comes from number of repeated rows. Before beginning, check chain length against shoulder width so finished sweater does not become wider or narrower than intended.

Row 1

CH an amount that is a multiple of 14, plus 3. In 4th CH from hook, place 1 DC. Skipped 3 chains count as first DC, so this opening effectively begins with an increase. Place 1 DC in each of next 4 chains. DC2TOG over next 2 chains, then work second DC2TOG over following 2 chains. Place 1 DC in each of the next 4 chains. Work DC INC in next chain, then second DC INC in following chain. Repeat sequence across chain: 4 DC, 2 DC2TOG, 4 DC, 2 DC INC. At the final chain, place 2 DC.

The important feature in Row 1 is rhythm rather than simply stitch counting. Decreases pull the wave inward, while increases push the next section outward. Keeping the sequence consistent across the chain prevents uneven peaks and dips later.

Row 2

CH 3 and turn; CH 3 counts as first DC. Place 1 DC in very first stitch at base of CH 3. Place 1 DC in each of next 4 sts. Work DC2TOG twice over next 4 sts. Place 1 DC in each of the next 4 sts. Work DC INC twice in next 2 sts. Repeat wave sequence across row: 4 DC, 2 DC2TOG, 4 DC, 2 DC INC. At row end, 5 sts remain; place 1 DC in next 4 sts, then place 2 DC in final stitch, working into top of previous row’s CH 3 turning chain.

Check first and final stitches carefully here. Extra DC at both row edges keeps panel shape balanced while center wave sequence continues unchanged.

Rows 3-26

Repeat Row 2 for each row until reaching 26 total rows, or adjust row count for desired sweater length.

Alternating yarn colors after each row makes wave movement especially visible. When changing colors, keep tension consistent so one color does not pull wave peaks tighter than neighboring rows.

Flattening Top Edge

Wave rows naturally leave the top edge uneven. Flattening rows turn this jagged edge into a straight joining edge, making shoulder seaming much cleaner.

Do not cut yarn at panel end.

Flattening Row 1

CH 1, turn. Place 1 SC in first st. Place 1 HDC in next 3 sts. Place 1 DC in next 6 sts. Place 1 HDC in next 3 sts. Place 1 SC in next 2 sts. Repeat sequence across: 3 HDC, 6 DC, 3 HDC, 2 SC. End with 1 SC in final stitch.

Taller DC stitches fill lower wave dips, while shorter HDC and SC stitches pass over higher sections. This difference in stitch height is what brings the uneven wave edge toward a straight line, so keep stitch placement accurate rather than replacing stitches with one uniform height.

Flattening Row 2

CH 1, turn. Place 1 SC in every stitch across. Fasten off.

Run this same panel sequence again for back panel. Before fastening the second panel, compare both pieces side by side. Matching row counts and matching wave alignment will make shoulder and sleeve placement much easier.

Sleeves – Make 2

Tutorial uses 56 + 3 chains, 59 chains total, with 27 rows.

Row 1

CH desired sleeve width using a multiple of 14 + 3. Repeat Row 1 from body panel.

Rows 2-27

Repeat Row 2 from body panel through 27 total rows.

Flattening

Work the same Flattening Row 1 and Flattening Row 2 along one side only of the sleeve panel so this edge sits flush against the body. Fasten off.

Before attaching the sleeve, locate the flattened edge carefully. This edge needs to meet the body panel smoothly, while the opposite sleeve edge will later meet during side seaming.

Assembly

1. Join Shoulders

Lay front and back panels flat with right sides facing out. Hold panels against your chest to determine desired neck opening. Place stitch markers on both sides where shoulder seams should end, and neck opening should begin.

Thread tapestry needle and whip stitch each shoulder from outer edge inward toward stitch marker. For whip stitching, loop the needle over top continuously rather than sewing back and forth. Insert needle underneath both loops on the right side. Fasten off.

Check neck opening before completing both shoulders. Wider marker spacing gives more neck room, while bringing markers closer together creates a narrower opening.

2. Attach Sleeves

Open seamed body panels so they lie completely flat.

Find the exact center of the sleeve’s flattened top edge and align it with the shoulder seam. Pin center first.

For straight sleeve placement, count down 13 rows from the shoulder seam on the front panel and 13 rows down the back panel. Pin sleeve ends at these points.

Whip stitch sleeve to body panels. Repeat same process for second sleeve.

Counting both sides instead of relying only on visual placement helps keep sleeves level. If one end sits higher, sleeve may twist once side seams are closed.

3. Seam Sides

Fold entire sweater in half with right sides facing out.

Starting at the wrist cuff, whipstitch the sleeve bottom edges together up toward the armpit. Continue the same seam down the body side to the bottom hem.

Keep corresponding row colors aligned while sewing. Since colors alternate row by row, matching each color band at side seam gives finished sweater cleaner visual continuity.

Repeat side seam on opposite side.

Finishing & Steam Blocking

Weave in all loose yarn ends once every seam is secure. Turn sweater inside out if needed, then give it gentle steam blocking.

Steam blocking relaxes stitches and helps wave sections settle into smoother drape. Avoid pressing heavily against fabric; gentle steam is enough to relax yarn while preserving wave texturePattern Use