Under The Sea Party Theme

This summer, mingle with mermaids, dance with sailors and crack jokes with a clown fish at an Under the Sea party!

An Under the Sea party is great for summer and don’t worry, you don’t have to live close to the ocean to enjoy this theme. Decorate your party setting in blue and create your own spectacular underwater world with decorations and props. Dress up as a majestic sea creature and have a swimmingly good time!



There are plenty of dress up options for an under the Sea theme. Become a slimey octopus or a dazzling mermaid, a charming sailor or a scummy pirate, there are many creatures and characters to choose from.



 Mix and match, see all our Under the Sea costumes and accessories here.




Become the princess of the sea and mesmerize your guests in a sequined mermaid costume. For something more original dress up as a squirmy squid or a slimey octopus.

Under The Sea Party Theme


Transform into a creature of the sea:

  1. Mesmerizing Mermaid Womens Costume
  2. Squid Mens Costume
  3. Dazzling Womens Mermaid Costume
  4. Octopus Adult Costume




Create your underwater wonderland with colourful, tropical fish, seashell cut outs, and sea blue tableware.





  1. Summer Sea Lunch Napkins
  2. Summer Sea Party Plates
  3. Summer Sea Party Cups
  4. Summer Sea Plastic Table Cover
  5. Summer Sea paper Lanterns
  6. Pelican Cutout
  7. Coral Reef Scene Setter
  8. Hawaiian Plastic Shell Bikini Top
  9. Plastic Crab Party Prop
  10. Under the Sea Fish Cutouts
  11. Inflatable Shark Prop
  12. Hawaiian Seashell Cutouts
  13. Summer Sea Fringe Banner

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