Top 15 Under The Sea Decorations DIY [Easy To Make]

Are you dreaming of bringing the ocean’s magic into your home? If you’re looking for creative ways to transform your space with a seaside vibe, I’ve got you covered! 

Dive into these 15 DIY under-the-sea decoration ideas, each designed to capture the beauty and tranquility of the ocean. 

Let’s get started!

Under The Sea Decorations DIY

Under the Sea, decorations bring the enchanting beauty of the ocean into your home. From seashell garlands to jellyfish lanterns, these DIY projects capture the essence of marine life. 

Perfect for adding a coastal vibe, these decorations are easy to create and customize, making them ideal for parties, kids’ rooms, or simply to infuse your space with a serene, oceanic atmosphere.

1. Seashell Garland

Creating a seashell garland is a wonderful way to bring the ocean’s charm into your home. Start by collecting a variety of seashells from your beach trips or purchasing them from a craft store. 

You’ll also need some sturdy twine or fishing line and a hot glue gun. Simply thread the twine through small holes in the shells or glue the shells directly onto the twine. 

To add a touch of color, consider painting some of the shells in shades of blue and turquoise before stringing them. 

Hang your seashell garland across a window, mantel, or doorway to give your space a coastal vibe. 

This DIY project is perfect for a summer party or just to keep the beach close to your heart all year round.

2. Underwater Mason Jar Terrariums

Mason jar terrariums are a delightful and easy way to create a miniature underwater world. Start by filling a clean mason jar with layers of colored sand to mimic the ocean floor.

Add small seashells, faux coral, and tiny aquatic figurines, like fish or sea turtles. You can even include small, battery-operated LED lights to give your terrarium a magical glow. 

Seal the jar with its lid, and you have a beautiful, low-maintenance piece of ocean-inspired decor. 

These terrariums make excellent centerpieces for a nautical-themed party or a whimsical addition to a child’s bedroom. They are a fun project for all ages and can be customized to fit your personal style.

3. Driftwood Wind Chime

Transform collected driftwood pieces into a charming wind chime that sings with the ocean breeze. 

Gather several pieces of driftwood in varying lengths, and drill small holes through one end of each piece. 

Thread a strong fishing line through the holes and tie them to a sturdy piece of driftwood or a wooden ring. 

You can also add seashells, sea glass, or small bells for extra decoration and sound. Hang your driftwood wind chime in your garden, on your porch, or near a window where it can catch the wind. 

This project not only creates a soothing sound but also serves as a beautiful reminder of your beach adventures.

4. Coral Reef Candle Holders

Create stunning coral reef candle holders to add a touch of undersea elegance to your home. 

Start with glass candle holders or jars and a collection of faux coral pieces, which you can find at craft stores. 

Use a hot glue gun to attach the coral pieces around the base of the candle holder, creating a textured, layered effect. 

For a more vibrant look, paint the coral in bright colors like pink, orange, and purple before gluing them on. 

Once the glue is dry, place a candle inside and watch as the light dances through the coral, casting beautiful shadows. 

These candle holders make fantastic centerpieces for dinner parties or a romantic evening at home.

5. Fishnet Wall Decor

Fishnet wall decor brings a rustic, nautical touch to any room. Purchase a piece of decorative fishnet from a craft store or repurpose an old fishing net. 

Stretch the net across a wall, securing it with hooks or nails. You can then decorate the net with various ocean-themed items like seashells, starfish, small driftwood pieces, and even photos from your beach vacations. 

For an extra touch, weave some fairy lights through the net to create a cozy, illuminated display. 

This project is perfect for a living room, bedroom, or even a bathroom, instantly transporting you to a seaside cottage.

6. DIY Mermaid Tail Blanket

Crafting a mermaid tail blanket is a fun and cozy way to embrace your inner sea creature. Start by choosing a soft, stretchy fabric in your favorite ocean-inspired color. 

Cut the fabric into the shape of a mermaid tail, ensuring it’s long enough to cover your legs. Sew the edges together, leaving the top open for your waist. 

Add decorative elements like sequins, fabric scales, or a fin at the bottom to enhance the mermaid look. 

This blanket is perfect for snuggling up on the couch while watching your favorite underwater adventures or as a unique gift for a mermaid-loving friend.

7. Jellyfish Lanterns

Jellyfish lanterns are an enchanting addition to any under-the-sea-themed event. Begin with paper lanterns in various sizes and colors. 

Cut long strips of crepe paper or ribbon to create the jellyfish tentacles, and attach them to the bottom of the lantern using tape or glue. 

For added texture, mix in strips of lace, tulle, or even glow-in-the-dark materials. Hang the lanterns from the ceiling with fishing line, so they appear to float in mid-air. 

These ethereal jellyfish lanterns are sure to captivate your guests and add a magical touch to your decor.

8. Ocean Wave Wall Art

Bring the beauty of the ocean into your home with a DIY ocean wave wall art piece. Start with a large canvas and acrylic paints in shades of blue, green, and white.

Use broad brushstrokes to create a wave pattern, blending the colors to mimic the movement of the ocean. 

For added texture, consider using modeling paste or sand mixed with paint to create a three-dimensional effect. 

Once the paint is dry, you can enhance your artwork with details like foam, splashes, or even small seashells glued to the canvas. 

Hang your ocean wave art in a prominent place to remind you of the sea’s tranquility and power.

9. Starfish Photo Frames

Starfish photo frames are a simple yet elegant way to showcase your favorite beach memories. Purchase plain photo frames and a collection of starfish from a craft store. 

Paint the frames in soft, beachy colors like white, sandy beige, or pastel blue. Once the paint is dry, use a hot glue gun to attach the starfish to the frames, arranging them in a pleasing pattern. 

You can also add small seashells or pieces of sea glass for extra decoration. Insert your favorite beach photos, and you have a beautiful keepsake that captures the essence of your seaside adventures.

10. DIY Coral Shadow Boxes

Create a stunning display with DIY coral shadow boxes. Start with a set of shadow boxes in various sizes. 

Paint the inside of each box in a deep ocean blue or sandy beige to mimic the sea floor. Arrange faux coral pieces inside the boxes, using hot glue to secure them in place. 

You can also add small seashells, sea glass, or tiny aquatic figurines for extra detail. Arrange the shadow boxes on a wall in a visually appealing pattern to create a striking under-the-sea display. 

This project is perfect for adding depth and interest to a living room or hallway.

11. Sand Dollar Garland

A sand dollar garland is a beautiful and delicate way to decorate for an under-the-sea theme. Start by collecting sand dollars or purchasing them from a craft store. 

Drill small holes at the top of each sand dollar and thread a piece of twine or ribbon through the holes. Space the sand dollars evenly along the twine, tying knots to keep them in place. 

For an added touch, you can paint the sand dollars in pastel colors or add a touch of glitter. 

Hang your garland along a mantel, across a window, or above a doorway to bring a touch of coastal charm to your home.

12. DIY Nautical Rope Mirrors

Nautical rope mirrors add a rustic, seaside charm to any room. Begin with a round mirror and a length of thick nautical rope. 

Use a hot glue gun to attach the rope around the edge of the mirror, creating a frame.

You can add additional layers of rope to make a thicker frame or incorporate smaller decorative elements like seashells or starfish. Once the glue is dry, hang your mirror in a prominent place to reflect your love for the sea. 

This project is perfect for a bathroom, entryway, or living room, adding a touch of nautical elegance to your decor.

13. Shell-Encrusted Planters

Transform ordinary planters into beautiful, ocean-inspired decor with seashells. Start with plain terra cotta or ceramic planters and a collection of seashells in various shapes and sizes. 

Use a hot glue gun to attach the shells to the outside of the planter, covering the surface completely or creating a pattern. 

Consider painting the planter in a soft, beachy color for a more polished look before adding the shells. Once the glue is dry, fill your planter with your favorite plants or succulents. 

These shell-encrusted planters make a lovely addition to a patio, garden, or indoor space, bringing a touch of the beach to your greenery.

14. DIY Underwater Scene Jars

Create a whimsical underwater scene in a jar with just a few simple materials. Start with a clean mason jar and fill the bottom with a layer of sand or small pebbles. Add small seashells, faux coral, and tiny aquatic figurines like fish or sea turtles. 

Include a few drops of blue food coloring for a magical touch and fill the jar with water. Seal the jar tightly with its lid and shake gently to create a swirling underwater effect. 

These underwater scene jars make delightful decorations for a bathroom, bedroom, or even a party centerpiece, capturing the wonder of the ocean in a small, enchanting display.

15. Pearl and Shell Napkin Rings

Add a touch of elegance to your table setting with DIY pearl and shell napkin rings. Start with plain napkin rings or make your own by cutting sections of a cardboard tube. 

Wrap each ring in a piece of ribbon or fabric in a beachy color, securing it with hot glue. 

Then, glue small seashells and faux pearls to the outside of the ring, creating a beautiful, ocean-inspired design. 

These napkin rings are perfect for a summer dinner party or a beach-themed event, adding a touch of sophistication and coastal charm to your table decor. They’re a fun and easy project that will.