Summerween is a fictional holiday from the animated series Gravity Falls, where the townspeople celebrate Halloween in June because they love it so much.

How do you dress up for a Summerween party?

Combine summer clothing like swimsuits, Hawaiian shirts, and sunglasses with classic Halloween motifs like ghosts, skeletons, and carved watermelons.

What is a Jack-o'-Melon?

A Jack-o'-Melon is a watermelon carved with a spooky face, used during Summerween instead of a traditional pumpkin jack-o'-lantern.

Summerween Costume: DIY Gravity Falls Ideas & Try It On

Summerween

Celebrate Halloween in June with spooky, warm-weather summer styles.

Summerween is the Gravity Falls holiday where citizens celebrate Halloween on the second-to-last Friday of June. This costume style blends spooky Halloween elements with breezy summer staples like shorts, floral prints, and pool gear. It is a popular choice for themed summer parties, Gravity Falls fans, and anyone looking for a comfortable, warm-weather cosplay.

Difficulty: Easy
Time: ~30 min
Budget: $20–60

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40 Summerween costume ideas

Ranked by how many people are searching for them this season. Open any one for the full guide and to try it on.

What you need for a Summerween costume

Summerween Jack-o'-Melon T-Shirt
A black or orange t-shirt featuring a carved watermelon face instead of a pumpkin.
DIY: Draw a carved jack-o'-lantern face onto a green or orange t-shirt using black fabric markers.
Amazon
Breezy Board Shorts or Swim Trunks
Bright green, orange, or tropical patterned shorts to keep the summer vibe alive.
DIY: Use any bright summer shorts or a grass skirt you already own.
Amazon
Spooky Hawaiian Shirt
A short-sleeve button-down shirt featuring tropical flowers mixed with skulls or ghosts.
DIY: Pin small plastic spiders or felt bats onto a standard floral Hawaiian shirt.
Amazon
Watermelon Bucket Hat
A pink and green bucket hat resembling a watermelon slice to shade from the summer sun.
DIY: Wear a plain green bucket hat and draw black teardrop seeds on it with a marker.
Amazon
Trick-or-Treat Sand Bucket
A plastic beach pail used to collect 'Loser Candy' instead of a traditional pumpkin bucket.
DIY: Draw a spooky face on a yellow or blue plastic sand bucket with a black permanent marker.
Amazon

How to put it together

1
Put on the spooky Hawaiian shirt over the Summerween t-shirt, leaving it unbuttoned for a relaxed look.
2
Slip into the bright board shorts or swim trunks.
3
Place the watermelon bucket hat on your head, tilting it slightly back.
4
Put on comfortable summer footwear like flip-flops or canvas sneakers.
5
Carry the plastic sand bucket filled with assorted colorful candies as your trick-or-treat prop.

Makeup & hair

Keep hair messy and beach-ready. Apply light, sun-kissed bronzer or use face paint to draw small watermelon seeds or a tiny ghost on one cheek.

Summerween for couples, groups, kids & more

couples: One person dresses as Dipper Pines in summer gear, and the other dresses as Mabel Pines in a sleeveless Summerween sweater.
group: Have the group dress as Gravity Falls characters wearing swimsuits, sunglasses, and spooky Halloween masks.
kids: A simple green t-shirt painted to look like a carved Jack-o'-Melon paired with comfortable cargo shorts.
Plus size: A loose-fitting, short-sleeve spooky tropical button-down paired with comfortable drawstring linen pants.
pet: A dog-sized bandana featuring a carved watermelon print.

Tips

Choose lightweight, breathable cotton or linen fabrics to stay cool during outdoor summer events.
Fill your beach bucket with real candy to share with friends at the party.
Wear sunscreen if your Summerween celebration takes place outdoors during the day.
Incorporate classic Gravity Falls references, like a pine tree logo or a pink sweater vest, to delight fans.

Summerween costume FAQ

What is Summerween?: Summerween is a fictional holiday from the animated series Gravity Falls, where the townspeople celebrate Halloween in June because they love it so much.
How do you dress up for a Summerween party?: Combine summer clothing like swimsuits, Hawaiian shirts, and sunglasses with classic Halloween motifs like ghosts, skeletons, and carved watermelons.
What is a Jack-o'-Melon?: A Jack-o'-Melon is a watermelon carved with a spooky face, used during Summerween instead of a traditional pumpkin jack-o'-lantern.

Did you know? In the Gravity Falls universe, Summerween is celebrated on the second-to-last Friday of June, and the primary treat is 'Loser Candy'—the unpopular candy that nobody wants.