How to Throw a Surf Shack Beach Bash Birthday for Siblings – Budget-Friendly & So Fun!
surfs up
🏝️🦈🧜♀️
surfs up 🏝️🦈🧜♀️
Planning two (or more!) birthdays in one season? A co-ed sibling party is the perfect way to celebrate big — without doubling your stress or your budget. We threw a Surf Shack Beach Bash in our backyard for our little ones and made it fun, affordable, and full of personality!
From a giant inflatable water slide to custom cakes and themed tables, every detail was tailored to match our kids’ unique styles — and we found so many cute party supplies on Amazon. Keep reading for all the fun ideas, easy DIYs, and how we kept it affordable!
🎂 The Vibe: Backyard Surf Shack Meets Mermaid + Shark Party
We wanted the party to feel like one big beachy celebration — with elements for both boys and girls to feel special. Our theme was a coastal surf shack with pops of ocean fun, featuring mermaids, sharks, pineapples, surfboards, and waves of blue.
💡 Highlight Features:
Inflatable water slide rental (backyard-sized but big fun!)
DIY balloon garlands in ocean blues, aqua, and sunshine yellow
Shark & surf table setup for the boys
Mermaid & pineapple table for the girls
Three fun cakes to match each child’s personality
Custom cookies, cupcakes, and party snacks
Kid-sized tables and chairs for a cute and comfy setup
Easy Amazon party finds to tie it all together
🍰 The Magical Cakes: One for Each Kid
Each of our kiddos got their own cake that matched their vibe:
🦈 Surfer Boy Cake – Bold, blue, and toothy for our fearless one
🧜♀️ Mermaid Cake – Sparkly scales and shells for our dreamy girl
🌞 Pineapple Cake – Bright and tropical for our sunshine-loving toddler
Not only did this make each child feel special — it made the dessert table a total showstopper.
🧁 Cookies, Cupcakes & Sweet Details
No beach bash is complete without adorable themed treats. We had:
Surfboard + Waves sugar cookies
Palm Trees & Sunnies cookies
Simple vanilla & Chocolate cupcakes with shell + shark toppers
A sprinkle of edible glitter made everything sparkle like sun on water 🌊
🧜♀️
🦈
🧜♀️ 🦈
🪑 Setting the Scene: Kid-Size Tables + Themed Decor
We rented child-sized tables and chairs (so worth it!) and styled them two ways:
🦈 Shark + Surf Table
Blue wave tablecloth
Mini surfboards + beach stickers
Shark napkins and plates
Cups of fresh fruit
🧜♀️ Mermaid + Pineapple Table
Iridescent sequin runner
Pineapple Plates, cups + napkins
DIY centerpiece with glittered palms
Cups of Fresh fruit
🛍️ Amazon Finds That Made It Happen
Here’s everything we used or recommend to make your own Surf Shack Beach Bash easy and fun. Most of it ships fast and won’t break your budget:
💦 Activity Rentals or Extras:
💬 Final Thoughts: Family Fun That Sticks
Throwing a sibling party can feel like a lot — but this Surf Shack Beach Bash turned into one of our favorite memories yet. The kids felt celebrated individually, the decor was festive without the stress, and everyone left with sandy toes and big smiles.
Backyard birthdays are where the best memories are made — especially when there's sunshine, cookies, and a splash zone!
This post may contain affiliate links. As an Amazon Associate, I earn from qualifying purchases — at no extra cost to you. I only recommend products I truly love and use.
