Get ready to make a splash! Sending out pretty mermaid party invitations sets the stage for an enchanting underwater adventure, guaranteeing your guests are already diving into excitement before the party starts.

With shimmering details and whimsical designs, these invitations promise a magical gathering where memories swim forever.

Why not go digital for your mermaid bash? Delight guests with instant RSVPs and the ability to easily share all the underwater excitement across digital platforms.

With every click, you'll be making waves and spreading the magic faster than you can say "mermaid party!

Let’s kick off ultimate mermaid under the sea birthday party ideas with a dazzling dessert table that takes you deep into the ocean.

The gorgeous sparkly sequin backdrop is so girly, as is the beautiful balloon garland, and under-the-sea party decorations.

Sometimes keeping it simple can be just as effective. As long as you have a stunning birthday cake, some pretty cookies, and pretty party decorations, your party can be equally as beautiful as an elaborate one!

Who would say that decorating with a white balloon garland would take you into a magical world at the bottom of the ocean?

If you’re looking for something a little different from the previous suggestion, take a look at this next mermaid dessert table.

It has the most amazing, almost transparent white balloon party decorations that give you the feeling that you’re at the bottom of the ocean.

Love the Illustrated mermaid backdrop and the pretty pastel colors.

This next dessert table is so exquisite. The balloon garland framing the dessert table it’s so beautiful.

Love the delicate blue tulle table skirt and floral decorations.

Check out our tulle table skirt tutorial, and make your own!

This mermaid birthday cake is beautiful and inspired by the turquoise ocean.

Love the bottom ruffle tier and the top mermaid scale tier, decorated with gold sea lions and a beautiful pink mermaid.

To finish off, this birthday cake is topped with two wonderful starfish toppers.

WOW! Our next cake will blow you away.

It’s the ultimate mermaid cake that will stand proudly on a dessert table.

It’s made up of 3 tiers. A top under the sea tier, a mermaid tail-inspired middle tier, and a gorgeous gold sprinkle tier that looks just like sand.

A birthday cake it’s always expected to be a showstopper, and this one sure is this.

In gorgeous shades of turquoise and purple, this cake is covered in fondant sea fauna, and shells and topped with the most wonderful mermaid.

Have you ever seen a cuter bunch of cookies?

These mermaid-inspired cookies are the ultimate under-the-sea delight.
How much of a hit would a plate of mermaid, seashell, starfish, and other sea creature cookies be at your mermaid party?!

Use this wonderful mermaid cookie cutter set so you can make your own.

Another gorgeous alternative are these pink seashell cookies.

Each one is delicately decorated with a single sugar pearl.  It’s a subtle touch, but truly takes these cookies to another level.

If you’re looking for something different then you don’t want to miss this mermaid cookie.

They’ll look amazing on your dessert table and are certain to put a smile on your guests’ faces.

Cupcakes are always so delightful. Take a look at these impressive ones that look like actual works of art.

Each one is decorated with a bunch of colorful frosting swirls and topped with a magnificent mermaid tail.

This next cupcake is so exquisite. Placed inside an open clamshell, decorated with beautiful swirly frosting and topped with sugar pearls.

It looks so delicate and will delight all of your guests!

Cake pops are also big hits at parties.

Take a look at these mermaid tail cake pops, each one is decorated with a seashell, starfish, and the most amazing mermaid tail.

How much fun are these mermaid tail cake pops?

They look stunning and are the perfect party food for a mermaid birthday party.

If on the other hand if you’re looking for something a little more sparkly, how about these cute multicolored pastel cake pops covered in pretty sprinkles?

Each one is decorated with either a pretty seashell or a star.

If you love macaroons and would rather have them at your party than cookies then take a look at this next suggestion

Each of these lovely clam shell macarons is decorated with a single sugar pearl designed to look like clams. What a creative idea!

Lots of us are into donuts, and they are so on-trend,  so how about adding some under-the-sea-inspired ones to your mermaid party food.

Cover each donut with frosting and some fondant seashells. Finish them off with some cookie crumbs to make them look like they have sand on them.

These mermaid Rice Krispy Treats look amazing and are a wonderful addition to your mermaid party.

Dip them in melted colored chocolate and decorate them with mermaid tails and seashells.
As you can see they look fabulous on a plate.

Imagine just how fabulous these gorgeous mermaid parfaits will look on your dessert table!

Make them with under the sea shades and decorate each one with a mermaid tail and some pretty sprinkles.

Check out this quick and easy mermaid party food idea that will take you deep into the ocean.

Get a bunch of colorful rock candy and you’ve instantly got yourself some corals on a stick. How easy is that?

Have fun at your mermaid party by serving your guests some ‘ocean water’ to drink.

Place regular water, or even add a few drops of dye, into a drink dispenser to create an on-theme beverage.
Finish it off by adding some plastic greenery to your dispenser.

You won’t need to invest much time and effort into creating these fabulous mermaid bottles.

Grab yourself a bunch of pretty glass bottles and tie some whimsical ribbons to give them a delicate under-the-sea-themed look.

If you’re on a budget and looking for a quick and easy party decoration download our free mermaid party printables.

This gorgeous set includes mermaid cupcake toppers, water bottle labels, mermaid party favor tags, and much more…

Feel free to also download this FREE mermaid and dolphin printables set.
Included is a mermaid invitation, a mermaid birthday sign, a banner, and much more.
Simply download the set, print it out, cut each individual piece, and assemble.

Table settings are a great opportunity to put your decorating talents to good use.

How fabulous is this example? Love the big sequin tablecloth and the fauna and mermaid tail balloon decorations.

A cool idea is to have your mermaid party at the beach.

Have a low table and some pretty under-the-sea-themed plates and cups  Use some cushioned seating and you’re good to go.

Don’t forget to place some parasols to keep everyone out of the sun.

This next tablescape is so beautiful. The adorable pink color scheme is so girly.

Love the glass bottles with a donut placed on top of each one. The shell centerpiece is really pretty, as too are the floral decorations.

These next table settings also take us deep into the ocean.

The seashell plates and pretty mermaid tail party favor boxes give us an under-the-sea vibe.

What’s not to love about the mermaid balloon centerpiece and the pink tulle backdrop?

Dive into the excitement of your mermaid party with printable activity placemats!

They'll keep the kids entertained with games and puzzles while adding a splash of underwater charm to your table decorations.

Welcome your guests to your underwater paradise with this mermaid-themed welcome sign, setting the scene for an unforgettable adventure.

Place it at the entrance adorned with shimmering details and vibrant colors, ensuring every visitor feels the magic from the moment they arrive.

Make a splash at your party with this mermaid-inspired number centerpiece!

It's not just a decoration—it's a fun and stylish way to mark the celebration while enchanting your guests with underwater magic.

These whimsical purple, almost jellyfish-like, chair coverings are absolutely perfect for a mermaid extravaganza.

They add so much class to any little girl’s party.

You can try and recreate this look with these chair covers.

Decorate your mermaid birthday party with this gorgeous under the sea-inspired milestone poster!

It's just what you need to add a personalized touch that not only celebrates the birthday girls' special moments but adds to the magic of your underwater-themed celebration.

The party decorations at this mermaid party are mesmerizing.

The ceiling is covered in strips of purple, pale blue, and pink tulle fabric. with a bunch of paper lanterns and pretty tassel tail fringes.

To add to these amazing decorations are a bunch of transparent balloons that look like bubbles.

Take a look at this gorgeous jellyfish centerpiece. Made with a purple paper lantern and ribbons it looks incredible decorating a table. The transparent balloons add such a cute touch.

You can try and recreate this look with this jellyfish lantern.

Transform your mermaid birthday bash instantly with a mermaid foil balloon like this one!

It's a quick and easy way to add a splash of fun and whimsy to your party decor, making your celebration shimmer with enchantment as if it were straight out of the depths of the sea.

Another awesome party decoration is this blue and white balloon centerpiece.

Each one has a foil balloon animal such as a pink dolphin or a blue octopus.

A fun suggestion is to have a different animal for each table.

Different-sized clear balloons all tied together to a long string and hung from the ceiling create an amazing under the sea look.

If you love balloons then you don’t want to miss this incredible pastel balloon wall in pretty tones of pink and purple.

Together with the other under the sea party decorations, this birthday party is a dream

Balloon decorations are really really popular and so on-trend, just take a look at this amazing mermaid tail balloon garland that beautifully framed this dessert table.

You couldn’t wish for more gorgeous mermaid party decorations.

Here is another example of a beautiful balloon mermaid tail.

This multicolored balloon garland will add the perfect touch to your celebration!

For the ultimate mermaid balloon tail check out this amazing work of art!

This balloon decor is sure to impress all your guests and take your party to that extra level!

Kids love photo booths. They are a great excuse to fool around while having their picture taken.

The more mermaid-themed photo booth props you have at a party the better.

Get ready to capture underwater memories with this mermaid-themed photo booth frame!

It's the perfect mermaid party activity, that adds a touch of fun and excitement while ensuring everyone swims away with unforgettable snapshots from your mermaid extravaganza.

If you’re looking for a photo booth prop that doubles up as a party favor, then how about treating your guests to these gorgeous mermaid-inspired costumes?

Create a little dress-up area at your party and have the clothes set out so that each one of your guests can pick their costume and feel like a mermaid for the day.

There are some party activities that girls dream of, so how about making a wish come true and throwing a memorable mermaid-themed sleepover?

What could be more thrilling than treating everyone to a night filled with late-night chats, pampering, snacks, a movie, and lots and lots of laughs?

Your guests will be blown away by a surprise appearance from a real-life mermaid which is why a visit from an entertainer is always a safe bet.

Younger children won’t believe their eyes when they see a mermaid walk in and spend the afternoon with them, doing fun activities, such as telling them all about her under-the-sea adventures with her mermaid friends.

Art activities always go down a treat! Set up an art station with mermaid canvases, paints, and brushes.

Each kid is gonna love bringing out the artist in them and they double up as fun party favors to take home and proudly use to decorate their bedroom!

Face painting is always a fantastic party activity, especially for little girls.

Treating your little guests to their very own mermaid look will fill their hearts with delight.

You can either paint your guests faces yourself with some face paint, if you have the skills, of course.

If not hire a face painter to come over and magically transformed each little girl into a beautiful mermaid.

Keeping kids busy at a party can sometimes be tricky.

Go for a classic game such as ‘Pin the Tail on the Mermaid’ to keep them entertained.

When it’s their turn, place a blindfold on your guest and have them try to pin the tail on the mermaid in the correct spot. Whoever gets closest wins.

Another magical activity that will make your guests feel special is a mermaid naming ceremony.

Hang a ‘What’s your Mermaid Name?’ poster on the wall and have everyone try to figure out what their mermaid name is.

Send your guests home with one of these gorgeous mermaid-themed party favor gable boxes decorated with sea fauna and a gorgeous mermaid.

They’ll be blown away by how pretty they are!

You could also send your guests home with a seashell party favor bag full of goodies.

They are ideal for a mermaid extravaganza!

If you are the crafty type how about making your own mermaid party favor bags?

All you need are some paper bags, cut-out circles, and a bunch of cut-out seashells. Glue them onto the paper bag and you’ve got yourself a fun mermaid favor bag.

You could even have your guests make their own and turn it into a party activity.

Treat your guests to these fun skin-safe and kid-friendly mermaid temporary tattoos.

The pack comes with a 15×21 cm tattoo sheet with 10 mermaid and tiny fish and sea creature tattoos.

Another cool party favor are some mermaid-inspired headbands.

You can never have too many, so they are the perfect gift for a girl.

Girls love jewelry you so can bet they’ll love these pretty felt mermaid necklaces.

They are a great party favor for both toddlers and little girls.

Send your guests home with one of these beautiful personalized mermaid tote bags full of under-the-sea goodies.

Not only are they perfect to store party favors but they are also a great fashion accessory your guests will love to flaunt!