When we decided to host a Mermaid Party for Isla’s 8th Birthday, we were able to really let our imaginations run wild. Because mermaids aren’t real creatures, it gave us total creative freedom to design our own vision and bring a unique under-the-sea theme to life.
It ended up being one of the most beautiful party themes we’ve ever created. We chose soft pastel colours with beach-inspired details and carried the Mermaid theme through every part of the celebration, from decorations and food to games, gifts and party favours.
The overall look and feel of this mermaid party was timeless, elegant and playful, making it a perfect theme for a wide range of ages.
Mermaid Party Area & Setup
Even though we knew we’d be using mermaid-themed decorations, choosing the right colour palette was key to tying everything together. We settled on pastel pink, blue and purple, which worked beautifully, even with some unexpected Queensland weather.
We had quite a bit of rain in the week leading up to Isla’s party, so we quickly created a backup plan and enclosed our entertainment area with blue tarps to keep guests dry.
Once everything was set up, we realised the blue tarps actually worked perfectly with the theme. The space instantly felt like an underwater world. To enhance the effect, we added mermaid and fish stickers with green crepe paper to mimic seaweed.
Our large canvas mermaid banner was hung using fishing line and attached to a stand decorated with streamers and balloons. If you’re setting up your own party backdrop, our Guide to Decorating and Hanging Party Banners is packed with practical tips.
For table styling, we scattered shells sourced from eBay and created centrepieces using short glass jars filled with purple sand and starfish. We also made jellyfish and octopus decorations from paper lanterns with crepe paper tentacles.
Throughout the party, we used personalised decorations including a canvas banner, bunting, posters, party bags, chocolate labels, water bottle labels and pop-top labels from our Mermaids Party theme.
All of these decorations were designed and printed in-house at Katie J Design & Events in Brisbane, QLD. Adding personalised details made the celebration feel extra special and created a beautifully cohesive party setup.
Mermaid Party Food
No party is complete without fun, themed food. Our mermaid party snacks were easy to prepare, kid-friendly and visually tied into the pastel under-the-sea theme.
Many of these ideas are simple enough for kids to help create, making them perfect for at-home birthday parties.
- Clam Shell Biscuits: Butternut Snap biscuits filled with pink buttercream and a white cashous pearl, served on crushed Scotch Finger biscuits for edible sand.
- Starfish Fairy Bread: Buttered bread cut with a star cookie cutter and sprinkled with 100s & 1000s.
- Sharks in Pink Jelly: A layered jelly treat inspired by our Rainbow Jelly Party Recipe.
- Rice Crispy Treats: LCM bars topped with blue frosting and white cashous.
- Mermaid Bark: White chocolate with sprinkles inspired by this unicorn bark recipe.
- Kiwi Sea Turtles: Kiwi slices with grape legs and icing gel eyes.
- Mandarin Crabs: Mandarin segments assembled with toothpicks and googly eyes.
- Crab & Octopus Dips: Capsicum creations served with dip.
Easy Mermaid Birthday Cake
Isla’s mermaid birthday cake was another simple cake hack. We used a plain round sponge, iced with pink frosting and decorated with shell toppers, sprinkles and a fondant mermaid tail.
Crushed Scotch Finger biscuits added a realistic sand effect, finished with mermaid candles.
Mermaid Party Games & Entertainment
Because of the rain, we kept activities simple but still on theme. Each child painted a plaster mermaid to take home, and we created colouring books using free mermaid printables.
Some guests stayed for a sleepover, complete with a mini pamper salon featuring foot spas and nail painting.
Mermaid Party Bags & Favours
Party bags included mermaid necklaces, lip gloss, bath bombs, glitter nail polish, stickers, LCM bars and Milky Way chocolates.
Mermaid Party Decorations & Supplies
Creating a mermaid party like this was just as fun for us as it was for the kids. If you’re planning a mermaid or under-the-sea party, we offer a wide range of personalised decorations designed and printed in Australia.
Click here to explore our Mermaid Party Decorations.
Frequently Asked Questions
What age is a mermaid party suitable for?
Mermaid parties are incredibly versatile and work beautifully for toddlers through to tweens and even adults, depending on the colour palette and styling.
Can I customise mermaid party decorations?
Yes. All of our mermaid party decorations can be personalised with a name, age and custom wording, and are printed in-house in Brisbane, QLD.
Do you ship mermaid party supplies outside Australia?
Yes. We ship Australia-wide and also offer international shipping to New Zealand and the United States.
Find Us at Katie J Design & Events
Looking for personalised party decorations, stickers, clothing and gifts? Katie J Design & Events specialises in custom party supplies made in Australia.
For more real party inspiration, visit Parties by Katie J and subscribe to our newsletter for updates and exclusive offers.
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