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By The Sea Blanket

Updated February 9, 2023
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The By The Sea Blanket is a quick and easy beginner friendly blanket. Whether you want to make a baby blanket or modify this blanket to make it bigger. This beginner friendly pattern is made up from UK trebles, slips stitches and chains. You can find the assisting video tutorials further down the post.

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By the Sea Blanket

You can purchase a low cost ad free, printable copy of this pattern HERE. Not only does it mean you get your own copy of the pattern to print, you also support a small business and help me to keep making free patterns!

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materials and tools

Yarn: Stylecraft Special Chunky (100% Acrylic), 144m (157yrds), 100g (3.5oz) 1 skein of each colour. 

Colour A: Silver (1203)

Colour B: White (1001)

Colour C: Storm Blue (1722)

Colour D: Graphite (1063)

Hook: 6mm (J/10 US)


Darning Needle

You Can Crochet with Bella Coco

pattern notes

This blanket was designed to use 4 balls of stylecraft special chunky, making it the prefect 4 ball project!


10cm x 10cm = 10 stitches x 6 rows

completed size

67.5 cm (H) x 85 cm (W) approx


Pattern written in UK terms

Chain Space(ch-sp)

Slip Stitch (ss): Insert hook into space, yarn over and pull through stitch and loop on hook

Chain (ch): Yarn over, pull through one loop on hook.

Treble crochet (tr):Yarn over, insert hook into stitch, yarn over, pull up a loop, you will have three loops on the hook. Yarn over, pull through two loops, yarn over, pull through remaining two loops.

By the Sea Blanket

Unsure of the differences between UK and US terms? Need a refresher on how to do your stitches? In my ‘How to crochet: A handy reference guide’ EBook I help you with all of these terms and you can always have them to hand! You will also get exclusive access to free video instructions. You can find my EBook HERE.

How to Crochet: a handy reference guide

by the sea blanket pattern

Using Colour A

Foundation: Ch 70 + 3 for turning.

Row 1: Tr in 4th ch from hook and each ch to end, turn. (70 sts including turning ch here and throughout)

Row 2-12: Ch3 (counts as a tr here and throughout), tr in each st to end, turn. (70 sts)

Fasten off Colour A and attach Colour B

Row 13-24: Ch3, tr in each st to end, turn. (70 sts)

Fasten off Colour B and attach Colour C

Row 25-36: Ch3, tr in first st and each st to end, turn. (70 sts)

Fasten off Colour C and attach Colour D

Row 37-48: Ch3, tr in first st and each st to end, turn. (70 sts)

Fasten off and sew in ends. 

By the Sea Blanket

How to adapt

If you would like to make this blanket bigger, double (or treble or more) the length of the chain. You must then do the same with the rows. So if you have doubled the amount of the chains, you would also double the amount of the rows.

assisting tutorial: tips for keeping straight edge

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Patch Work Blanket

I always love to see your makes so if you try any of my patterns or follow my stitch tutorials please tag me @bellacococrochet or use the #bellacococrochet

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  • joanne james
    February 23, 2019 at 12:02 pm

    hi i have just bought this pattern.

    How do you treble crochet into the base of the chain 2 when the instructions are turn and chain 3

    • Sarah-Jayne
      February 24, 2019 at 2:34 pm

      Hi Joanne, have you watched the videos that goes along side the pattern? It will show you what to look for when doing the stitch 🙂

      • Amanda
        March 16, 2021 at 6:55 pm

        Hi want to make this blanket. Very much a begginer. Love your there avideo which goes along with this blanket pattern? Amanda

        • BellaCocoTeam
          March 18, 2021 at 2:48 pm

          Hi Amanda I do not have a video or this blanket, however it’s only treble crochet so maybe you could have a go at following the written pattern. Good luck 🙂

  • Val
    October 16, 2019 at 10:07 am

    Thank you for the pattern… off work as I tumble downstairs and have broken my leg so will have a go

    • BellaCocoTeam
      October 17, 2019 at 10:51 am

      Oh no Val I hope you get better soon and enjoy the time off work to do lots and lots of crochet lol 🙂

  • Pauline
    June 15, 2020 at 9:01 am

    Dear Sarah-Jayne, I have taken up crochet during lockdown and have been massively inspired by your website, your YouTube videos have been a godsend! I have chosen this blanket as my first proper project and decided to double it so it could properly wrap around a person so I bought 2 of each colour. I understand doubling the foundation chain from 70 to 140 but not sure I understand doubling the rows. Won’t doubling the chain and crochet 12 rows of each colour use all the yarn? Should I have bought more yarn? Will it look wrong if I just double to chain length but not the rows?

    • BellaCocoTeam
      June 16, 2020 at 2:19 pm

      Hi Pauline

      Thank you so much, it makes me really happy to know you’ve found my videos and website helpful As long as you have bought twice the yarn for this project then you shouldn’t run out by doubling the rows. If you want to keep just four blocks of colour then just double the number of rows from 12 to 24. Another option would be to keep 12 rows as in the pattern, but then repeat the whole colour sequence again so you have eight colour blocks. Hope this helps

      • Pauline
        June 16, 2020 at 3:40 pm

        oh yes I like this, thank you! I swapped the white for a meadow green (children with grubby hands don’t go well with white) and will post the outcome on insta for sure!


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