This Sea Glass crochet afghan pattern uses a simple two-row stitch repeat to create a pretty textured blanket with rows of colorful stitches and open spaces. The easy, repetitive pattern lets your mind wander as you work … so restorative and meditative!
I absolutely love the combination of blues, turquoise, and purple I used for this blanket. The colors remind me so much of pieces of sea glass washed ashore, which is exactly how this afghan got its name.
The pattern is worked in straight rows with no increases or decreases, and the colors are carried up the side as you work. You can also easily customize the width and length to make the blanket just the size you want.

Sea Glass Crochet Afghan Pattern

What You Need
- US H-8 / 5 mm crochet hook
- 3 colors of worsted weight yarn (shown here in Berroco Comfort)
- Scissors and yarn needle
Finished size: Approx. 54 in. × 73 in. (137 × 185 cm)
Abbreviations
Pattern is written in standard US crochet terms.
- ch – chain
- dc – double crochet
- hdc – half double crochet
- sc – single crochet
- sp(s) – space(s)
- st(s) – stitch(es)
- CA–CC – Colors A through C
Resources and tutorials you may find helpful for following this pattern include: Crochet Abbreviations and U.S. to U.K. Crochet Conversion Chart.
Add this pattern to your Ravelry library.
Available as a convenient, ad-free PDF download here.
Notes
- Stitch counts are provided at the end of each row to help you keep on track.
- Carry colors up the side of your work; do not fasten off at the end of each row.
- You can customize the width by beginning with any even number of stitches.
- Continue the two-row stitch repeat until the blanket reaches your desired length.
With CA, chain 154 sts (or work a Foundation Double Crochet of 152 sts and continue to Row 2).
Row 1: Work 1 dc in 4th ch from hook and each chain across, turn and drop CA — 152 dc.
Row 2: With CB, ch 1 (does not count as stitch here and throughout), work 1 sc in top of first dc, ch 2, *skip next 2 dc and work 1 sc between the 2nd skipped dc and the next dc, ch 2, repeat from * across, ending with 1 sc in top of the turning chain, turn and drop CB — 76 sc and 75 ch-2 sps.
Row 3: With CC, ch 3 (counts as dc here and throughout), work 2 dc in next ch-2 sp and each ch-2 sp across, work 1 dc in last sc, turn and drop CC — 152 dc.
Rows 4 through 155: Repeat Rows 2 and 3, continuing with the color sequence CA, CB, CC, until Row 155 or desired length is reached.
Fasten off all colors.
Click here to reference Crochet Stitch Chart Symbols.


Edging
Round 1: With the right side of your afghan facing you, join CA and work a sc edging around the afghan. Work 1 sc in each st across top and bottom; 3 sc in each corner; and 2 sc along the side edge of each dc row and 1 sc along the side edge of each sc row. Join and fasten off.
Round 2: Join CB in the back loop of any sc and ch 2 (counts as hdc), work 1 hdc in the back loop of each st around, working 4 hdc in each corner. Join and fasten off.
Round 3: Join CA (as shown in photo; or CC if desired instead) in the back loop of any hdc and ch 1, work 1 sc in the back loop of each st around, working 2 sc in each of the middle 2 sts of each corner. Join and fasten off.
Weave in ends.
More Crochet Blanket Patterns
Looking for another cozy project? Try one of these crochet blanket and afghan patterns.
- Free Afghan Patterns
- V-Stitch Crochet Ripple Afghan Pattern
- Lakeside Throw Afghan
- Continuous Mitered Square Afghan
- Chunky Crochet Blanket


I’m just starting this Afghan but the very first line says “With CA, chain 154”. What is CA stand for. I don’t see that referenced anywhere
I believe CA refers to “color A”
Question please on the first row (SC) of the edging. Approximately how many SC should be on the “sides” of the afghan. When I zoom in on the picture, it looks like multiple of threes – but I am unsure. Could you provide more details? Thank you!
Made this blanket as a gift for a former coworker, with just a tiny tweak to the border. I did two rows of single, one double, then three ribbed rows. Just one question, if I credit you am I able to sell the finished product?
Yes, you may absolutely sell any finished products made from my patterns. And pattern credit is always appreciated 🙂 Good luck!
Thank you so much!! This pattern is so amazing I just want to keep making it but don’t need anymore blankets!
Beautiful afghan! I’m not able to find those colours on the Borocco site. Do you have any other suggestions to try as I really like these colours.
Is there a video tutorial of this by any chance?