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


thank you so much for a beautiful afghan! I would have posted a photo of mine but cant. I used red heart super saver yarn in Navy, light Periwinkle and variegated Monet. Even my partner loves it-as I do.(i have photos on facebook)
I am having a hard time keeping my edges from increasing. Any suggestions? I feel like I am following the pattern exactly but have had to remove multiple rows.
Hi Tracey 🙂 Make sure you are working the last single crochet of one row into the top of the beginning chain of the previous row. If you still feel like your edges are crooked, when you add your edging it should smooth things out. Hope that helps.
If I wanted to make a smaller blanket, what is the stitch count? Love this and the colors are beautiful.
What a nice pattern that will be easy and fast to make since the colors are carried up the sides….hence there is no having a million ends to weave in once finished. I hate weaving in a ton of ends!
I crochet blankets for Project Linus, so the faster I am at completing a blanket, the more blankets I can make for this wonderful charity. It looks like a great pattern that I can use college colors and also the professional team colors of sports teams to make blankets that the boys will like. Project Linus seems to also be in need for boy blankets.
Thanks so much for posting your pattern! I so appreciate it!
hanks! The pattern is fantastic – just perfect for the baby blanket I am planning to dió on my holidays!
Best
Liska
So in love with this! I’m getting ready to share it on my facebook page and I think I may attempt to make it this fall! I’ve never attempted a project this big. I have a question for you about switching colors. Do you have a link to your favorite way to do this? Do you cut and tie off between each color or is there a way to carry your color with you? I never like the way it looks when I switch colors.
Hi Crystal 🙂 The beauty of this one is that you can carry the colors up the sides of the blanket … no need to fasten off and weave in a bunch of ends … yay!
Yay! I’ve never carried over a color. Do you have any suggestions on a tutorial to show how to do this?
It’s really pretty simple, I usually introduce my next color on the last yarn over of the row (see my tutorial here http://www.petalstopicots.com/2013/12/seamlessly-change-colors-in-crochet/) or you can really just finish your row and leave that ball hanging and just start crocheting your next row with your new color.
You’re awesome! Thank you Kara!
Took me about 2 minutes after I saw this to order the yarn. Love the pattern and the colors, thank you!!
I can’t get the pdf to download. Beautiful afghan…
What a beautiful afgan, I think this would lovely in my granddaughter’s room. She has it decorated with a beach scenary.
So glad you like it!
It’s very pretty – the colors are gorgeous. Thanks for sharing your pattern with us. 🙂
Thank you, Debi 🙂
This is really nice! I’m not much of a crocheter but someday I’d love to make an afghan. This one is so nice and with a little help, I bet I could make it. Thanks for the pattern.
My pleasure, Brenda 🙂