10 Exciting Mermaid Birthday Party Decoration Ideas

Is your little girl obsessed with all things mermaid? If so, then a mermaid birthday party is probably at the top of her birthday wish list! And who could blame her? Mermaids are fun, magical, and mysterious creatures that have captivated the hearts and imaginations of little girls for centuries. 

If you’re planning a mermaid birthday party for your daughter, niece, or any other special little girl in your life, then you’re going to want to check out these exciting mermaid birthday party decoration ideas.

Mermaid Birthday Party Decoration Ideas

A little bit whimsical and a whole lot of fun, mermaid parties are perfect for kids of all ages. Plus, they can easily be tailored to fit any budget. Keep reading for everything you need to plan a mermaid birthday party that will have your little ones squealing with delight.

1. Hanging Mermaid Tail Decorations

Mermaid Birthday Party Decoration Ideas

These hanging mermaid tail decorations are perfect for decorating the walls or ceiling of your party space! They come in a variety of colors, so you can choose the perfect shade to coordinate with your party’s color scheme. Plus, they add a touch of whimsy and magic that is sure to make your little girl’s special day even more unforgettable.

2. Under The Sea Balloon Arch Kit

This Under The Sea Balloon Arch Kit is an easy way to add a wow factor to your mermaid birthday party decorations. It comes with everything you need to create a beautiful balloon arch, including an air pump, ribbon, and self-sealing balloons in a variety of colors. Simply inflate the balloons, attach them to the ribbon using the included glue dots, and voila! You’ve got a gorgeous balloon arch that is sure to impress all of your guests.

3. Mermaid Birthday Banner

Mermaid Birthday Banner

This pretty mermaid birthday banner is perfect for hanging above the food table, presents table, or any other area of your party space that could use a little bit of extra decoration. It features colorful pennants with fun mermaid-themed phrases like “happy birthday” and “let’s be mermaids”.

4. Mermaid Photo Booth props

Make sure to capture all of the memories from your little girl’s big day with this set of 12 mermaid photo booth props. They come with an assortment of fun accessories like paper crowns, starfish glasses, and shells that will help dress up any picture. And they make it easy for everyone at the party – both grownups and kids – to get in on the fun!                   

5. Under The Sea Confetti

Under The Sea Confetti

This under-the-sea confetti is perfect for adding a touch of magic to any area of your party space. Scatter it on tables, floors, or any other flat surfaces to create an enchanting look that is sure to please all of your little guests.

6. Seashell Garland

 Seashell Garland

This seashell garland is another easy way to add some under-the-sea charm to your party decorations. It would look beautiful draped across a mantelpiece or hung from doorways or windows. Plus, it’s super easy to make – simply string together some pretty shells using a fishing line or thread and you’re done.

7. Centerpiece Sticks

Centerpiece Sticks

These centerpiece sticks are perfect for dressing up any table in your party space. Simply insert them into vases or pots filled with sand or rocks, and you’ve got instant centerpieces that are sure not only look great but also double as fun photo props.

8. Seashell Suncatchers

These seashell suncatchers are such a fun and unique addition to any mermaid birthday party decoration scheme! They catch the light beautifully and add a touch of sparkle and shine that is sure to dazzle all of your guests. Plus, they’re super easy to make – simply glue shells onto clear plastic sheets using glitter glue or hot glue.

9. Personalized Water Bottle Labels     

 Personalized Water Bottle Labels                  

These personalized water bottle labels are an easy way to add a special touch to your child’s big day. Simply attach them to bottles of water using double-sided tape or glue dots and you’ve got custom water bottles that are not only practical but also festive and fun.                             

10. Mermaid Party Decorations

Mermaid Party Decorations

No matter what your budget is, you can easily find mermaid party decorations to fit your needs. For example, if you’re on a tight budget, you can decorate with items you already have around the house, like blue streamers and green balloons.

Or, if you have a little more to spend, you can purchase ready-made decorations, like banners and hanging decor. Either way, your guests are sure to be impressed with your decorating skills.

How to Plan a Mermaid Party Food Ideas  That’s Sure to Make a Splash

No birthday party is complete without delicious food, and a mermaid birthday party is no exception! You can keep it simple with finger foods and snacks that represent the colors of the sea, like blueberries and grapes. Or, get creative with fun-themed foods, like goldfish crackers “swimming” in a blue “ocean” of Jell-O. No matter what you choose to serve, your guests are sure to love it.

Splash into Fun with Mermaid Party Games 

What’s a birthday party without games? To keep your guests entertained, we suggest playing some classic games with a mermaid twist. For example, musical chairs can become musical seashells, and Pin the Tail on the Donkey can become Pin the Tail on the Mermaid. Just use your imagination and get creative! Your little ones are sure to have a blast.


These exciting ideas are sure to show you how easy it is to transform any space into an underwater paradise that is fit for a mermaid! With some easy decorations, delicious food, and fun games, you can easily throw a party that your guests will remember for years to come.