Blue Sea Knitted Lace Blanket — Free Knitting Pattern

There is something quietly magical about a lace knitting project. The way yarn transforms into something that looks almost impossibly delicate, full of open spaces and flowing lines, as if the fabric itself is breathing. The Blue Sea Knitted Lace Blanket captures exactly that feeling. Inspired by the rhythmic movement of ocean waves, the shifting blues of deep water, and the soft foam that edges every wave as it reaches the shore, this pattern is designed to be beautiful, meditative, and achievable for anyone with a little lace knitting experience.

Whether you are making this blanket as a gift for a new baby, a housewarming present, a cozy throw for your own reading chair, or simply because you want to spend your evenings doing something creative and deeply satisfying, this pattern will carry you through from the first cast-on stitch to the finished bound-off edge with clear, easy-to-follow instructions. Let’s begin.

Why You Will Love This Pattern

Lace knitting has a reputation for being complicated, and while some lace patterns truly are advanced, this one is built around a repeating motif that becomes intuitive after the first few repeats. Once your fingers learn the rhythm, you will find yourself moving through the rows almost without thinking, which is one of the great pleasures of knitting.

The wave-inspired stitch pattern creates a soft diagonal flow across the fabric. Light passes through the yarn overs in a way that makes the blanket shimmer when it catches sunlight, and the overall effect is genuinely lovely draped over a sofa, folded at the end of a bed, or wrapped around someone’s shoulders. The name comes not just from the color suggestions but from the way the finished fabric actually seems to move, rippling gently like water caught in an afternoon breeze.

This is also a pattern that is easy to scale. If you want a small lap blanket or a generous baby shower gift, you can cast on fewer stitches. If you want something large enough to spread across a queen-sized bed, you simply add more repeats. The instructions below will give you a finished blanket of approximately 40 by 50 inches, which is a versatile, useful size.

Materials You Will Need

Before you cast on, gather everything you need so your project flows smoothly from the start.

Yarn: Approximately 800 to 1,000 yards of DK or light worsted weight yarn. For the true Blue Sea effect, look for yarn in shades of ocean blue, soft teal, seafoam, or dusty slate. You can also work this in a gradient or self-striping yarn if you want the color to shift naturally as you knit, which creates a stunning, painterly result. Natural fiber blends like cotton-bamboo, cotton-linen, or a wool-silk blend drape beautifully and are ideal for blankets that will be used year-round. For a baby blanket, look for a soft, washable option like a superwash merino or a quality acrylic labeled “baby soft.”

Needles: US size 7 (4.5 mm) circular knitting needles, at least 32 inches long. Even though this blanket is worked flat, circular needles make it far easier to manage the width of the piece. The long cord holds all your stitches comfortably as you work back and forth.

Notions: A set of stitch markers, a tapestry needle for weaving in ends, scissors, and a row counter if you find that helpful. Blocking wires and rust-proof pins are not strictly required but will make an enormous difference to your finished blanket. Lace really blooms when it is properly blocked.

Gauge: Approximately 18 stitches and 24 rows over 4 inches in stockinette stitch after blocking. Gauge is not absolutely critical for a blanket, but it will affect your final dimensions, so if size matters to you, take the time to knit a small swatch.

Abbreviations and Stitch Guide

If you are new to lace knitting or just need a quick refresher, here is a guide to every abbreviation used in this pattern.

CO — cast on. Use a long-tail cast on for a stretchy, clean edge.

BO — bind off. Use a stretchy bind off such as the yarn-over bind off or the Jeny’s Surprisingly Stretchy Bind Off so the finished edge matches the cast-on edge in elasticity.

k — knit.

p — purl.

k2tog — knit two stitches together. This is a right-leaning decrease.

ssk — slip, slip, knit. Slip the first stitch knitwise, slip the second stitch knitwise, then insert the left needle through the front loops of both slipped stitches and knit them together. This is a left-leaning decrease.

yo — yarn over. Bring the yarn forward between the needles and then over the right needle to create a new stitch and an eyelet hole.

sl1 — slip one stitch purlwise with yarn in front.

pm — place marker.

sm — slip marker.

RS — right side of the work (the side that will face outward on the finished blanket).

WS — wrong side of the work.

rep — repeat.

Pattern Notes

This blanket is worked flat, back and forth in rows. Right side rows are the interesting, patterned rows. Wrong side rows are mostly purled, which gives your brain a rest and makes it easy to find your place if you set the project down between sessions.

The pattern is built on a repeat of 12 stitches plus a small selvedge border. The border stitches on each side are worked in a simple garter or seed stitch to keep the edges from curling and to frame the lace motif neatly.

The stitch pattern creates a wave that moves diagonally across the fabric, with yarn overs creating the open holes and paired decreases shaping the wave. After about two or three full repeats, you will see the wave emerge clearly from your needles, and that moment is one of the most satisfying things in knitting.

Always count your stitches at the end of every RS row until you have the pattern memorized. Because lace involves both adding stitches with yarn overs and removing them with decreases, it is very easy to lose track if you drop a yarn over or work an extra decrease. A stitch marker placed every 12 stitches at the start of your project helps enormously.

Cast On

Using your long-tail cast on method, cast on 183 stitches. This gives you a 12-stitch repeat across the main body, with border stitches on each side.

Row 1 (WS): Knit across all stitches. This creates your foundation ridge.

Row 2 (RS): Knit across all stitches.

Row 3 (WS): K3, purl to the last 3 stitches, k3.

Repeat rows 2 and 3 four more times for a total of 10 rows. This garter and reverse stockinette border will anchor the bottom of your blanket and prevent any curling.

The Blue Sea Lace Pattern

Now you are ready to begin the wave motif. The pattern is written out row by row below. After you have worked through the full 16-row repeat a couple of times, you may find you no longer need to consult the written instructions.

Set-up: K3 (border), place marker, work across main body stitches following pattern rows below, place marker, k3 (border).

The main body is worked over a 12-stitch repeat. With 183 total stitches, you have 3 border stitches on each side and 177 stitches in the main body, giving you 14 full repeats of 12 stitches plus 9 additional stitches that complete the visual balance of the wave.

Row 1 (RS): K3, sm, k1, yo, k3, k2tog, ssk, k3, yo, k1; rep from to last 12 stitches before final marker, k9, yo, k3, sm, k3.

Row 2 (WS): K3, sm, purl to final marker, sm, k3.

Row 3 (RS): K3, sm, k2, yo, k2, k2tog, ssk, k2, yo, k2; rep from to last 12 stitches before final marker, k9, yo, k2, sm, k3.

Row 4 (WS): K3, sm, purl to final marker, sm, k3.

Row 5 (RS): K3, sm, k3, yo, k1, k2tog, ssk, k1, yo, k3; rep from to last 12 stitches before final marker, k9, yo, k1, sm, k3.

Row 6 (WS): K3, sm, purl to final marker, sm, k3.

Row 7 (RS): K3, sm, k4, yo, k2tog, ssk, yo, k4; rep from to last 12 stitches before final marker, work remaining stitches in pattern, sm, k3.

Row 8 (WS): K3, sm, purl to final marker, sm, k3.

Row 9 (RS): K3, sm, yo, k1, ssk, k3, yo, k3, k2tog, k1; rep from across, sm, k3.

Row 10 (WS): K3, sm, purl to final marker, sm, k3.

Row 11 (RS): K3, sm, yo, k2, ssk, k2, yo, k2, k2tog, k2; rep from across, sm, k3.

Row 12 (WS): K3, sm, purl to final marker, sm, k3.

Row 13 (RS): K3, sm, yo, k3, ssk, k1, yo, k1, k2tog, k3; rep from across, sm, k3.

Row 14 (WS): K3, sm, purl to final marker, sm, k3.

Row 15 (RS): K3, sm, yo, k4, ssk, yo, k2tog, k4; rep from across, sm, k3.

Row 16 (WS): K3, sm, purl to final marker, sm, k3.

This completes one full 16-row repeat of the Blue Sea wave motif. Work these 16 rows repeatedly until your blanket measures approximately 47 inches from the cast-on edge, ending after a row 16 (a wrong side row).

Top Border

Once your blanket reaches the desired length, you will work a top border to mirror the bottom.

Row 1 (RS): Knit across.

Row 2 (WS): K3, purl to last 3 stitches, k3.

Repeat these two rows four more times, for a total of 10 rows. Then knit one final RS row.

Bind off on the next row (WS), using your chosen stretchy bind off method.

Finishing Your Blanket

Weave in all ends using your tapestry needle, taking care to secure them well on the wrong side so they do not work loose during washing.

Now comes the part that truly transforms a lace project: blocking. Wet blocking is the best method for natural fiber blankets. Fill a clean sink or basin with cool water and a small amount of wool wash or gentle soap. Submerge your blanket and gently press the water through the fibers. Do not wring, twist, or agitate. Let it soak for about 20 minutes.

Lift the blanket carefully, supporting its full weight, and press it gently against the side of the basin to remove excess water. Then roll it in a clean dry towel and press down firmly. Unroll the towel and transfer your blanket to a flat blocking surface.

Using your blocking wires and rust-proof pins, pin the blanket into its final shape, gently stretching the lace to open up the holes and straighten the edges. Work methodically from the corners inward. The difference between a blocked and unblocked lace piece is dramatic — the waves will open up beautifully, the eyelets will form clean circles, and the overall dimensions of your blanket will expand and settle into their final measurements.

Leave the blanket to dry completely before unpinning. Depending on the yarn fiber content and the humidity in your home, this may take anywhere from a few hours to a full day.

Care Instructions

Always check the care label on your specific yarn for washing guidance. As a general rule, hand wash your lace blanket in cool water with gentle soap and lay flat to dry. Avoid the dryer, which can felt natural fibers and distort the lace structure. Store your finished blanket folded loosely or rolled rather than compressed in a tight space. If using wool, cedar blocks placed near the storage area will help protect against moths.

Tips for Knitting Success

A few extra thoughts that will help your project go smoothly from beginning to end.

Lifelines are your best friend in lace knitting. Thread a smooth, slippery piece of waste yarn through all the live stitches on your needle at the end of any correctly completed RS row. If you make a mistake several rows later, you can rip back to the lifeline without fear of losing stitches. Move the lifeline forward every 10 or 20 rows as your confidence grows.

Work in good light, especially when you are learning the wave motif. Lace stitches require you to see what you are doing clearly, and working in poor light or when you are tired is a fast path to mistakes.

If you lose count within a row, stop and look at the stitches already on your right needle. The pattern of knits, purl bumps, yarn overs, and decreases will tell you exactly where you are within the repeat. This visual reading skill develops quickly with lace knitting and will serve you well on every future project.

Yarn Substitution Ideas

The ocean theme of this blanket opens up a beautiful range of color possibilities. A deep navy blue creates something dramatic and striking, almost like a night sea. A pale seafoam or soft sage reads as more summery and light. A heathered slate gray is modern and versatile. A creamy natural white looks elegant and timeless. You could also work the blanket in two alternating blues, switching every 16-row repeat, for a subtle gradient effect without any yarn dyeing required.

If you want to lean into the oceanic feeling as deeply as possible, look for hand-dyed yarn in ocean colorways — there are many independent dyers who create gorgeous blues and teals with subtle variation that catches the light differently across the surface of the blanket, making the wave motif even more alive.

Sizing Modifications

To make a baby blanket, cast on 99 stitches instead of 183 and work until the piece measures roughly 30 inches from the cast-on edge. This gives you a generous, wrappable baby blanket that will last well into toddlerhood.

To make a large throw or a bed blanket, cast on 243 stitches and work to your desired length. Keep in mind that larger projects require significantly more yarn, so purchase extra before you begin — running out of a specific dye lot is one of the most frustrating experiences in knitting.

Sharing Your Finished Blanket

When you finish your Blue Sea Knitted Lace Blanket, please share it. Share it with the person you made it for. Share a photograph with your knitting group or on social media with the hashtag #blueseablanket so other knitters can find inspiration in your work. Knitting is one of the oldest creative traditions in the world, and there is something deeply connecting about knowing that your hands are doing what countless hands before yours have done — transforming fiber into fabric, one stitch at a time.

Whether this is your first lace project or your fiftieth, I hope the Blue Sea Knitted Lace Blanket brings you the particular joy that only a satisfying handcraft project can offer: the quiet pleasure of making something beautiful, entirely by hand, from nothing more than a length of yarn and a pair of needles.

Happy knitting.