The Best Mermaid Birthday Ideas + Free Printable

Neil Maley

Mermaids are right up there with unicorns and princesses on the list of classic girl birthday themes. If you're scrambling to make your little one's under-the-sea dreams come true, we have the perfect planning kit just for you!

Keep reading for the best mermaid birthday party cake, decor, food, games, favors, and more! 

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INVITATIONS
Make a splash and start the celebration with the perfect invitation!
We've caught the best mermaid birthday party invitations, with options to print yourself, or to order pre-printed.
If you prefer ordering pre-printed invitations, EstablishedCoGifts can have these Under the Sea Invitations mailed right to your door!
Another great hassle-free option are these Mermaid Birthday Invitations from PrettyPaperPixels.
Order them in print, or purchase a digital copy to print yourself.
PrettyPress offers this adorable downloadable Mermaid Birthday Invitation to personalize and print yourself.
Another edit-yourself option from KayAndColeCreations, we love this Mermaid Girls Party Invitation on Etsy!
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CAKE
No birthday is complete without cake!
Below you'll find some incredible creations to inspire your local baker, as well as delicious designs you can recreate at home.
No matter your level of baking comfort, keep scrolling for inspiration!
These fancy fish creations can inspire your local baker!
Bring these designs to life in your own home kitchen with full tutorials!
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DECOR
Transform your party space into a deep sea wonderland with these fun and creative mermaid birthday party decor ideas!
Whether you're a DIY master or prefer store-bought, we have the perfect picks for you.
Keep scrolling!
Kristy By The Sea used a variety of paper plates to mimic scales on the wall.
We love this creative idea!
Get creative with those traditional decorating supplies -
turn streamers into seaweed and clear balloons into bubbles!
Party Like a Cherry shares these creative ideas on her blog.
Add your child's name to this personalized mermaid vinyl banner!
You can choose from several sizes through PalmtoPineDesign on Etsy.
You can take your standard party balloons to the next level with a little help from HappyPartySupply on Etsy.
Customize these mermaid balloon bundles with a giant number for your child's age!
Simply Allie has lots of fantastic decor ideas - so many she created a video!
For some quick inspiration, check out her DIY Mermaid Birthday Party YouTube video.

 KitchenDoor offers this cute mermaid decor package on Etsy.

Choose your customized combo of balloons, netting, and wording delivered right to your door!

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OUTFITS
Make sure your little mermaid looks the part with these mermaid birthday party outfits we've created just for the occasion!

 

Customize this simple mermaid birthday girl shirt with your child's age, and even change the colors!

 Deck the whole family out to match for the party!

 This matching family mermaid birthday shirt set can be customized with any colors, names, and sizes.

Check out this fun design in our shop!

 Your little one will love this mermaid tutu set!

The top is available with or without the accessories, and you can customize it with any age.

This is another style similar to the one above, but with your little one's name added!

This mermaid tutu set is available in our shop!

Go check it out!

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FOOD
Every party needs some great snacks.
Feed your deep sea crew with these awesome mermaid birthday party food ideas!
Fill these adorable Crabwiches with any filling you like: meat and cheese, PB&J, chicken or egg or tuna salad...the possibilities are endless!
Transform your favorite spinach or artichoke dip into the perfect Seaweed Dip mermaid snack!
Create your own delicious Ocean Water with this simple, easy party punch recipe from Laura's Crafty Life.
Click for the recipe! 
How adorable are these clamshell cookies?!
Add a pop of color to your sweet treats with the recipe from MomDot.
Muddy buddies/puppy chow is a kid classic.
This fun recipe from Pink Cake Plate shows you how to transform it into the perfect mermaid treat.
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GAMES
Wrangle some mermaid energy with these fun party games to keep your guests busy!
Transform a classic limbo game into an underwater blast with some blue streamers!
365 Day of Crafts offers a full tutorial.
Grab this printable Mermaid Scavenger Hunt kit on Etsy for just $5!
Customize it to your space to build your own treasure hunt adventure.
Have your guests decorate treasure boxes with paint, stickers, jewels, and more, and then take them home as party favors! 
You can even fill them with chocolate coins or wrapped candies as treasure.
Kimspired DIY shares almost a dozen different Mermaid Slime recipes.
You can't go wrong with slime!
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FAVORS
 Every party needs a good take-home gift to continue the celebration!
We're gathered some fantastic mermaid birthday party favor ideas just for you.
Tie back some mermaid hair with these bright Mermaid Hair Ties from TheBohoGlam on Etsy.
BeadedPerfection offers these Mermaid Tail Bracelets on Etsy for some simple mermaid glam. 
These Mermaid Crayons come in pre-packaged, customizable bags.
Add your child's name and a special note to the label!
Oriental Trading offers these fun Squishy Mermaid Tails for less than $2 apiece!
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PRINTABLE
You have all the ideas now for the perfect birthday party, but you still need to keep track of them all and make sure it all gets done! Don't worry, we've covered that too; check out our FREE PRINTABLE party planning checklist just for you!
Click below to get your copy!

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Thanks for reading! We hope your party is a mermaid fairy-tail!

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