Easy Water Themed Halloween Costumes That Will Make A Big SPLASH!

Prepping for a costume party, planning a trunk-or-treat or scrambling to find the perfect Halloween costume for your little tyke? Look no further than the pool, and use those happy splashy times as inspiration for your next DIY adventure. We have compiled some user-friendly, easy-to-create water themed costumes that will have other trick-or-treaters dreaming of a summer swim.

Easy Swimming Inspired Costumes

If you’re an aqua-parent, you have the sights, sounds and smells of the pool ingrained in your mind. So, naturally, let’s look toward the pool, the sea and the imagination for this creative list of water themed outfits as inspiration. It’s time to pin, save and recreate.  Recycle items, use craft supplies around the house or visit a dollar store, and you’ll be on your way to one splashtastic Halloween.

DIY Swimming Pool Costume

Be one with the pool. This kidney-shaped cutout is the perfect way to put some of those Barbies to good use while creating a unique, one-of-a-kind costume of your child’s favorite activity—SWIMMING!

Homemade Jellyfish Costume

All the other swim kiddos will be “peanut butter JELLY” of this costume! With a whole lot of squiggle and sparkle, this costume will bring the giggle and glow to any trick or treating adventure. This costume can come together relatively quickly; watch our how-to video below.

Estimated Time: Approximately two hours, and worth every minute!
Supplies you will need:

• Clear umbrella
• 15 – 20 white plastic grocery bags
• Packing tape
• Portable USB battery
• Wired LED string lights
• Scissors
• Decorative trim/string (48 ft.)

Did you create your own shining, shimmering jellyfish? Tag us on Facebook and Instagram so we can admire your custom creation, too!

Last Minute Scuba Costume

Scuba baby, swim on over to me. We don’t know what’s cutest—the two liter air tank, paci mouthpiece or flippered feet—but this little guy is sure to dive into some sweet treats ASAP!

DIY Kids Lifeguard Costume

Excuse us, Mr. Lifeguard? You may not save any lives while gathering candy, but you’re sure to snag some hearts! This tot is too cute in his cutoff tee, water shoes and backwards hat. And that sunscreen nose. STOP. Give him a whistle and call it a day! This may be one kid’s dress up costume that you keep handy for imagination adventures beyond Halloween.

Easy Shark Costume

“Baby Shark, do do do do do do…” We’re singing the song already! Embrace the Baby Shark madness in this easy-peasy shark hoodie to keep baby warm while he stalks his sugary prey.

Mom and Baby Starfish Costume

Star of the fish show! We know mamas need NO EXCUSE to wear leggings in public, but if you’re looking for one, this costume gives you the perfect reason as your baby’s backdrop. Carry your little super starfish around the block and give everyone something to smile about! We recommend substituting flip flops for flippers.

Easy DIY Mermaid Costume

Little Miss Merry Mermaid. Let your little girl feel like the Queen of the Sea in this merry mermaid makeover. From the crustacean-covered crown to the super scaly tail, she’ll be a Halloween highlight at every stop!

DIY Crab Costume

A not-so-crabby cutie! So cute we could pinch him! Pipe-cleaners, felt and hot glue transform this hoodie and gloves into a crab fit for a king.

Olympic Swimmer Costume

Is that Olympic gold medalist Michael Phelps? This costume is sure to bring home the gold without breaking the bank! A few plastic medals from the party store, a simple swim cap, goggles and swimming suit will earn this costume first place!

At Aqua-Tots Swim Schools, we know that swimming is fun and water themed Halloween costumes can reflect that, too. We hope these easy DIY water costume ideas inspire you to make a splash this holiday. Happy trick-or-treating, Tots!