Sea Breeze Afghan Pattern

Wrap your little one in the soothing textures of the coast with this beautifully draped cotton baby blanket, featuring a simple two-row repeat and a clean, modern border.

Have you ever wanted to crochet during the sweltering summer months but found yourself suffocating under a heavy wool blanket?

It is a common dilemma for passionate makers. We want to keep our hands busy, yet working with bulky acrylics in July feels like a chore.

Cotton is the ultimate warm-weather savior.

When I first started working with 100% cotton yarn years ago, I found it a bit stiff on my fingers. But over time, either the yarn manufacturing improved or my hands simply adapted, because now I absolutely adore its crisp definition and breathable weight. It drapes beautifully and washes like a dream.

That is exactly why I designed this coastal-inspired baby blanket. It uses a clever two-row repeat that mimics the classic look of a granny stitch but offers a much tighter, sturdier weave that is perfect for tiny fingers and toes.

Best of all, the simple border makes it wonderfully gender-neutral.

Why You'll Love This Pattern

• Breathable Cotton Texture: Ideal for spring and summer babies, keeping them cozy without overheating.
• Simple Two-Row Repeat: Once you establish the foundation, you can relax and watch your favorite show while crocheting.
• Minimal Weaving in Ends: A clever technique allows you to carry your yarn up the sides, saving you hours of tedious finishing work.

Materials You'll Need

• Yarn: Sable Sugar 'n Cream (100% Cotton, Worsted Weight Size 4). You will need Soft Ecru (cream) as your main shade, along with Seabreeze (blue) and Overcast (gray) for the contrasting stripes.
• Hook: Size I (5.5mm) crochet hook for the main body; Size G (4.5mm) crochet hook for the border.
• Notions: Tapestry needle for weaving in any remaining ends and scissors.
• Yardage: Approximately 900 yards of the main cream color and 180 yards of each contrasting color.

Gauge & Sizing

• Gauge: 12 double crochet stitches = 4-1/4 inches; 4 stripes (each stripe consisting of 1 double crochet row and 1 single crochet row) = 4 inches.
• Sizes included: One size (easily adjustable by changing your starting chain).
• Finished measurements: 34-1/2 inches wide by 42 inches long.

Abbreviations & Stitch Instructions

• sc (single crochet): Insert hook, yarn over, pull up a loop, yarn over, pull through both loops.
• hdc (half double crochet): Yarn over, insert hook, yarn over, pull up a loop, yarn over, pull through all three loops.
• dc (double crochet): Yarn over, insert hook, yarn over, pull up a loop, yarn over, pull through two loops, yarn over, pull through remaining two loops.
• hdc2tog (Special Stitch for Border): Half double crochet two together worked in the specified chain. Yarn over, insert hook into the designated chain and pull up a loop. Yarn over, insert hook into the same chain and pull up another loop (5 loops on hook). Yarn over and pull through all 5 loops.

Pattern Notes

• Skill Level: Easy / Advanced Beginner.
• This pattern is written in US crochet terms.
• The item is worked flat in rows, with a border added in rounds at the end.
• Tension Tip: Cotton yarn has very little stretch. Keep your tension relaxed, especially during the initial chain row, to prevent the bottom edge from bowing.
• Customization Tip: You can easily alter the width of this blanket by starting with any multiple of 2 chains.

Step-by-Step Instructions

Foundation and Row 1

Using your 5.5mm hook and the cream yarn, chain 94.

Row 1: Work 1 dc in the 4th chain from your hook (the skipped 3 chains count as your first dc). Work 1 dc into every chain across to the very end. Turn your work. (92 dc)

Establishing the Two-Row Repeat

Row 2: Chain 1 (this does not count as a stitch). Work 1 sc in the first stitch. Chain 2, skip the next dc, then work 1 sc in the space between the dc stitches. *[Chain 2, skip the next 2 dc, work 1 sc in the next space between the dc stitches]. Repeat from * across until only 1 dc and your turning chain remain. Chain 2, skip the next dc, and work 1 sc into the top of the turning chain. Turn your work. (47 sc)

Row 3: Chain 3 (counts as your first dc). Work 1 dc in the first chain-2 space. Work 2 dc in each chain-2 space across to the final chain-2 space. Work 1 dc in the last chain-2 space, then work 1 dc in the final sc. Turn your work. (92 dc)

Working the Stripe Sequence

To create the beautiful coastal stripes, you will repeat Rows 2 and 3 while changing colors.

Color Change Tip: When switching colors at the end of a single crochet row, begin your final sc as usual. When you have 2 loops left on your hook, yarn over with the new color and pull it through to complete the stitch. Start the next row using this new color.

Carrying Yarn: Do not cut your yarn after every color change. Simply drop the unused color and pick it back up when needed. The carried yarn will run along the side of your work and will be completely hidden when you crochet the border. If you prefer to fasten off, do so for the blue and gray yarns, but keep the cream attached as it is used most frequently.

Rows 4 - 5: Continue with cream. Repeat Rows 2 and 3. On the final sc of Row 5, drop the cream and join the blue yarn.

Rows 6 - 7: Using blue, repeat Rows 3 and 2. On the final sc of Row 7, drop the blue and join the cream yarn.

Rows 8 - 9: Using cream, repeat Rows 3 and 2. On the final sc of Row 9, drop the cream and join the gray yarn.

Rows 10 - 11: Using gray, repeat Rows 3 and 2. On the final sc of Row 11, drop the gray and join the cream yarn.

Rows 12 - 13: Using cream, repeat Rows 3 and 2. On the final sc of Row 13, drop the cream and join the blue yarn.

Rows 14 - 73: Repeat the sequence from Rows 11 to 20 (which corresponds to the stripe rotation of blue, cream, gray, cream) 6 more times.

Rows 74 - 78: Continue with cream yarn and repeat Rows 3, 2, 3, 2, and 3. Do not fasten off your yarn.

Crocheting the Border

Switch to your G (4.5mm) hook.

Round 1: Working down the side of your blanket, chain 1. *[Work 2 dc across the end of each dc row, and 1 sc across the end of each sc row]. Repeat this sequence down to the first corner, then work 3 sc in the corner space.

Continue along the bottom edge, working 1 sc into each free loop of your foundation chain. To prevent holes, insert your hook directly under the junction of the two free loops.

At the next corner, work 3 sc. Work sc up the remaining side, crocheting directly over your carried yarn tails to hide them.

When you reach the top corner, work 3 sc. Work 1 sc in each stitch of the final row until 1 stitch remains. Work 2 sc in that last stitch, then slip stitch to the first stitch of the round. Do not turn.

Round 2: Chain 1, work 2 sc in the same stitch. *[Work 1 sc in each stitch across to the next corner, then work 3 sc in the corner]. Repeat from * around the entire blanket, ending with a slip stitch to the first sc. Do not turn.

Round 3 (Edging): Chain 4 (counts as sc plus chain 3). Work hdc2tog in the 3rd chain from your hook. Skip the next 2 sc, then work 1 sc in the next stitch. *[Chain 3, work hdc2tog in the 3rd chain from your hook, skip 2 sc, work 1 sc in the next stitch]. Repeat from * to the next corner. At the corner, chain 3, work hdc2tog in the 3rd chain from your hook, skip 1 sc, and work 1 sc in the next stitch. Repeat this sequence around the entire blanket. Slip stitch to the first chain of your turning chain to join. Fasten off.

Weave in any remaining tails securely.

Easy Variations & Custom Ideas

• Solid Color Elegance: If you prefer a simpler look, skip the color changes entirely. Crocheting this blanket in a single solid shade highlights the gorgeous texture of the stitch. You can find a similar relaxing vibe in my Rolling Pebbles Blanket.
• Cozy Chunky Version: Swap the worsted weight cotton for a bulky yarn and a larger hook to make a thick winter throw. For inspiration on working with heavier weights, take a look at the Tropical Shore Blanket.
• Playful Tassels: Add large, fluffy tassels to the four corners of the blanket instead of working the final decorative round of the border.
• Gender-Neutral Pastels: Swap the coastal blues and grays for soft mint, pale yellow, and cream to create a beautiful, modern nursery accessory.
• Toddler Size Adjustment: To make this blanket larger for a toddler bed, simply increase your starting chain in any multiple of 2 and add more row repeats until you reach your desired length.
• Colour ideas: Try a sunset palette with warm terracotta, soft peach, and cream, or a forest theme with sage green, mustard, and ecru.
• Yarn substitutions: Paintbox Yarns Cotton Aran or Bernat Handicrafter Cotton are excellent alternatives if Sable Sugar 'n Cream is unavailable.

Common Troubleshooting & Fixes

• Problem: The edges of my blanket are curling or bowing inward.
  Fix: This usually happens if your starting chain is too tight. Try using a hook one size larger just for your foundation chain, then switch back to the recommended hook.
• Problem: My stitch count is off at the end of Row 2.
  Fix: Make sure you are skipping exactly two double crochet stitches between your single crochets. It is easy to accidentally skip three.
• Problem: The carried yarn on the sides looks messy or loose.
  Fix: Keep a consistent tension when picking up your dropped colors. When working the border in Round 1, ensure you crochet completely over these carried strands to secure and hide them.
• Problem: The cotton yarn feels too stiff while I am working.
  Fix: Cotton has no natural elasticity. Try using an ergonomic hook to reduce hand strain, and remember that cotton softens up significantly after its first wash.

Care Instructions

To keep your cotton afghan looking its best, machine wash it in cold water on a gentle cycle with similar colors. Tumble dry on low heat or lay flat to dry. Avoid using bleach, as it can fade the vibrant coastal colors.

Final Thoughts

There is nothing quite like the satisfaction of completing a handmade blanket, especially one as versatile as this coastal throw. Whether you are gifting it to a new mom or keeping it as a lightweight lap throw for chilly summer evenings, I hope you enjoy every single stitch. Happy crocheting, my friends!