There’s something about mermaid costumes that always feels magical to me. The shimmer, the colors, and the chance to play dress up as an ocean queen make it one of my favorite Halloween looks.
I love how versatile mermaid style can be. Some days I want full-on glam with sequins and a crown, while other times a simple seashell top with a sparkly skirt feels just right.
No matter the vibe, I always feel like mermaid costumes bring out the fun, playful side of Halloween. That’s why I put together some of the most creative and stunning ideas to help inspire your own under-the-sea moment this year.
Glam Silver Mermaid Outfit
This costume shines with metallic scales that shimmer under the light, giving it that authentic underwater feel. The fitted bodice enhances the shape, while layers of pearls add a luxurious touch that instantly elevates the look. With long, flowing hair and bold aqua eyeshadow, the outfit feels like a modern-day siren ready to enchant at any Halloween gathering.
I love how this outfit strikes the perfect balance between glamorous and playful. The silver tones catch every bit of sparkle, and the pearls make it feel extra chic without being over the top. It is one of those costumes that makes you feel both magical and stylish, which is exactly what I want when dressing up for Halloween.
Regal Green Mermaid Costume
This outfit features a strapless emerald green sequin bodice that sparkles with every movement, paired with a matching fishtail-inspired skirt that enhances the mermaid fantasy. Layered pearl necklaces drape beautifully across the neckline, while seashell hair accents and a bold silver trident complete the commanding look. The overall styling feels powerful yet elegant, perfect for making a grand entrance at any Halloween event.
I adore how this costume feels both glamorous and strong. The shimmering green fabric instantly catches the eye, and the pearls give it that perfect touch of under-the-sea royalty. Holding the trident makes the whole outfit feel extra fierce, and honestly, I love the confidence it gives off. It’s one of those looks that makes you feel like the star of the night.
Pastel Fantasy Mermaid Look
This costume sparkles with iridescent rainbow scales that shimmer under the light, paired with a dreamy seashell crown that adds a touch of ocean royalty. Her soft pink wavy hair ties the whole pastel palette together, while the glittery details give the outfit a whimsical glow. Surrounded by pumpkins and colorful party décor, the entire look feels like a magical crossover between Halloween and a fairy-tale underwater world.
I think this outfit is absolutely adorable. The pastel colors make it feel playful and sweet, and the seashell crown gives it just the right amount of drama. I love how it stands out from the darker, spookier costumes while still feeling festive and fun. It’s the kind of mermaid look that makes me want to smile the whole night.
Dark Glam Mermaid Costume
This outfit transforms the classic mermaid look into something mysterious and striking. The purple sequined bodice sparkles beautifully against the black lace details, while the layered choker necklace adds a dramatic edge. Dark lipstick and flowing black hair complete the gothic-inspired vibe, making this mermaid costume perfect for anyone who loves a little touch of enchantment with their Halloween look.
I think this is such a cool twist on mermaid style. The mix of purple and black feels bold and edgy while still glamorous. I love how the accessories tie everything together, especially the statement choker that makes the outfit pop. It’s the kind of costume that lets you feel powerful and stylish all night long.
Glam Red Mermaid Gown
This costume is a showstopper with its bold red sequined fabric and figure-hugging silhouette that flows into a dramatic fishtail hem. The seashell-inspired bodice in shades of pink and white adds a playful nod to mermaid style while still keeping things chic and glamorous. Paired with voluminous curls, a confident pose, and a backdrop of glowing balloons, this look is perfect for anyone who wants to own the spotlight.
I absolutely love how this outfit mixes sultry and fun in the best way. The red sequins give it that striking, fiery vibe, while the shell detailing adds just enough whimsy to keep it on theme. It’s the kind of costume that makes you feel like the queen of both the sea and the party, and I honestly can’t think of a better combo.
Silver Sequin Mermaid Queen
This look features a dazzling silver sequin corset that shimmers with every flicker of light, paired with a sparkling fishtail silhouette that feels perfectly on theme. The jeweled crown adds an extra layer of drama, turning the outfit into a true statement of underwater royalty. Long flowing blonde waves and delicate pearl jewelry complete the glamorous vibe, making it a standout Halloween mermaid costume.
I think this outfit is breathtaking. The way the sequins catch the light makes it feel so magical, and the crown instantly gives it queen-of-the-sea energy. I love how it blends sparkle with elegance, because it’s the kind of costume that doesn’t just look amazing in photos but also makes you feel radiant the entire night.
Classic Seashell Mermaid Outfit
This costume captures the timeless mermaid vibe with a green sequin fishtail skirt that shimmers under the light and a seashell bikini top that feels straight out of the ocean. Simple gold accessories and layered necklaces give the look a boho edge, while the natural waves of her long hair add to the carefree, under-the-sea feel. The cozy indoor setting with pumpkins makes the whole outfit feel both festive and fun.
I love how this look keeps things classic while still feeling fresh. The seashell top is such an iconic mermaid detail, and paired with the sparkly green skirt, it instantly gives that magical ocean goddess energy. It’s playful, easy to pull off, and one of those costumes that always looks good without trying too hard.
Ariel Inspired Mermaid Costume
This outfit is all about the classic fairytale mermaid look, featuring a shimmering green fishtail skirt paired with a lavender seashell-style top adorned with beaded accents. Her vibrant red waves flow beautifully and the floral hair accessory adds a delicate finishing touch. Surrounded by carved pumpkins and colorful garden décor, the whole scene feels like a magical crossover between Halloween and a whimsical seaside fantasy.
I love how this costume channels that iconic mermaid vibe while still feeling fresh and stylish. The purple and green combo is instantly recognizable, and the sparkly details make it extra eye catching. It’s one of those outfits that feels playful yet glamorous, and I can totally see it being a hit at any Halloween party.
Sparkling Teal Mermaid Dress
This mermaid costume is all about glam with its shimmering teal sequins and curve-hugging fit that flows into a dramatic fishtail hem. The plunging neckline and high slit give it a sultry edge, while the layered sequin scales at the bottom add that perfect ocean-inspired texture. Paired with silver strappy heels and tousled blonde waves, it feels like the ultimate mix of red-carpet chic and fantasy mermaid magic.
I think this outfit is absolutely stunning. The way it sparkles under the lights makes it feel so luxurious, and the slit gives it a flirty, confident vibe. It’s the kind of mermaid costume that makes you feel powerful, glamorous, and totally unforgettable at any Halloween party.
Iridescent Purple Mermaid Gown
This look features a sleek mermaid gown in a stunning mix of deep purple and teal that shifts beautifully in the light, giving it that perfect under-the-sea shimmer. The structured fishtail silhouette hugs the body in all the right places, while the plunging neckline adds a daring edge. Topped with a bold seashell crown and styled with flowing waves, it creates a dramatic yet elegant mermaid vibe.
I think this outfit is such a statement piece. The iridescent fabric makes it feel magical, and the seashell crown gives it that ocean royalty energy that I can’t get enough of. It’s one of those costumes that instantly makes you feel glamorous and powerful, and honestly, it’s hard not to feel like the queen of Halloween in this look.
Silver Sparkle Mermaid Gown
This costume is pure fantasy with its shimmering silver corset bodice covered in sequins and a dramatic layered fishtail skirt that flows like ocean waves. The structured fit gives it a regal silhouette, while the ornate crown adds the finishing touch that transforms the entire look into something fit for a mermaid queen. The soft lavender hair blends beautifully with the silvery tones, creating an ethereal vibe that stands out against the glowing lanterns and stone castle backdrop.
I think this outfit is absolutely breathtaking. The way the sequins sparkle makes it feel magical, and the full fishtail skirt gives it that fairy-tale drama we all secretly love. Paired with the jeweled crown, it’s the kind of mermaid look that makes you feel like you just stepped out of an enchanted underwater kingdom straight into a Halloween dream.
Gothic Emerald Mermaid Look
This outfit feels both dramatic and enchanting with its deep emerald green corset that glimmers softly in the candlelight. Black lace gloves and matching jewelry add a gothic touch, while the jeweled crown completes the royal vibe. The dark curls and smoky eye makeup bring the whole look together, making it feel like a mermaid queen who rules the sea after sunset.
I think this costume is stunning in such a unique way. The mix of emerald and black feels bold and powerful, and the lace gloves give it that extra touch of elegance. I love how it stands out from the brighter, glittery mermaid styles by leaning into a darker, moodier aesthetic. It’s the perfect choice if you want a Halloween look that feels both glamorous and a little mysterious.
Enchanted Ocean Mermaid Costume
This outfit is breathtaking with its shimmering emerald green scales that cascade into a flowing fishtail silhouette. The sheer cape glitters with golden details, adding layers of elegance that catch the light beautifully. Styled with voluminous curls and surrounded by ocean-inspired textures, the whole look feels like an underwater fantasy brought to life.
I adore how this costume combines glamour and drama in such a seamless way. The scale pattern is so eye catching, and the cape gives it that regal flair that makes it feel extra special. It’s the kind of mermaid look that makes you feel like you’re not just dressing up but stepping straight into a magical world.
Glam Black Feather Mermaid Outfit
This costume is full of drama with its deep green scale-patterned gown that glimmers under the light. The fitted silhouette hugs the body like a true mermaid tail, while black feathered sleeves add a bold and glamorous twist. The jeweled crown with feather accents completes the look, giving it a regal and mysterious flair that’s perfect for Halloween.
I think this outfit is such a striking take on mermaid style. The feathers make it feel unique and unexpected, and the dark tones keep it elegant and moody. I love how it blends ocean-inspired shimmer with a touch of old Hollywood glamour. It’s one of those costumes that makes you feel powerful and unforgettable the moment you put it on.
Classic Ariel Inspired Mermaid Outfit
This costume nails the iconic mermaid aesthetic with a glittering green scale skirt and a lavender seashell-style top that sparkles under the lights. The look is completed with a statement crown covered in ocean-inspired details, giving it that royal under-the-sea vibe. Her long flowing red hair ties it all together, creating a perfect nod to the beloved fairytale mermaid.
I think this outfit is such a fun and timeless choice. The purple and green combo is instantly recognizable and always feels magical. I love how the crown makes it stand out even more, giving it a glamorous edge. It’s one of those costumes that feels classic yet bold, and honestly, it’s hard not to feel like the star of the night wearing it.
Shimmering Silver Scale Mermaid Outfit
This costume stuns with its metallic scale design in shimmering shades of silver and lavender that catch the light with every movement. The structured top and matching skirt create a bold mermaid silhouette, while the delicate accessories and flowing silver hair give it an ethereal, futuristic twist. Surrounded by glowing jellyfish and purple lighting, the whole look feels like an underwater dreamscape brought to life.
I think this outfit is so striking and unique. The holographic shimmer makes it impossible to miss, and the colors feel both modern and magical. I love how it stands out from the usual mermaid costumes by leaning into a bolder, more otherworldly vibe. It’s the kind of look that makes you feel like the star of your own enchanted sea adventure.
Sparkly Purple Mermaid Gown
This outfit turns heads with its deep purple sequined gown that hugs the body and flares into a fishtail silhouette. The bold black belt with a jeweled buckle adds extra drama, while the statement necklace brings a touch of regal flair. Her sleek long hair styled with ocean-inspired accessories ties it all together, giving the costume a glamorous mermaid queen finish.
I think this look is such a powerful and stylish take on a mermaid costume. The purple sequins shimmer beautifully, and the dramatic accessories make it feel both fierce and elegant. It’s one of those costumes that makes you feel confident the moment you put it on, and honestly, I love how it blends glamour with a little bit of bold attitude.
Emerald Glam Mermaid Gown
This outfit sparkles with an emerald green sequin gown that hugs the figure before flowing into a fishtail-style hem. The plunging neckline adds drama, while the jeweled crown elevates the look into something fit for a mermaid queen. Styled with soft waves and bold red lipstick, the entire ensemble feels luxurious and elegant, perfect for a glamorous Halloween night.
I think this look is absolutely stunning. The green sequins shimmer beautifully, and the crown makes it feel like royalty under the sea. I love how the gown strikes the perfect balance between sophisticated and bold, giving it that unforgettable wow factor. It’s one of those costumes that instantly makes you feel confident and glamorous the moment you step into it.
Ice Queen Mermaid Outfit
This costume sparkles with icy blue sequins that shimmer against the snowy setting, paired with a dramatic fishtail silhouette that feels straight out of a winter fairytale. The crystal crown is bold and regal, while her silver-toned hair and delicate jewelry add to the frosty, magical vibe. Everything about this look says mermaid royalty with a seasonal twist.
I think this outfit is absolutely enchanting. The cool blue tones mixed with the glittery details make it feel so unique compared to the usual mermaid colors. I love how the crown ties it all together and gives it that queenly energy. It’s the kind of costume that makes you feel ethereal and powerful at the same time.
Modern Silver Mermaid Outfit
This costume feels sleek and stylish with a metallic silver skirt that flows into a high slit, paired with a sheer, crystal-embellished top that sparkles under the lights. The fitted silhouette gives off that mermaid-tail vibe without being over the top, while strappy heels and bold earrings polish off the glamorous look. The whole outfit feels chic and modern, perfect for a Halloween party with a fashionable twist.
I think this is such a refreshing take on a mermaid costume. The silver shimmer makes it feel futuristic, and the slit adds just the right amount of drama. I love how it blends elegance with a little bit of edge, making it the kind of outfit that stands out in the most effortless way.
Pastel Sparkle Mermaid Costume
This look is playful and dreamy with its iridescent pink and pearl-sequined top that glitters under the light. The layered pearl necklaces and bracelets add a touch of ocean-inspired elegance, while the long wavy blue hair makes the pastel palette pop even more. Surrounded by balloons in shades of pink and aqua, the whole outfit feels like a magical under-the-sea party come to life.
I think this costume is absolutely adorable. The pastel colors give it such a fun and whimsical vibe, and the sparkle makes it perfect for standing out at Halloween. I love how it feels sweet and glamorous at the same time, making it one of those outfits that instantly puts you in a festive mood.
Midnight Blue Mermaid Queen
This costume radiates elegance with a deep navy gown designed in a scale pattern that sparkles under dim light. The plunging neckline and figure-hugging cut create a bold silhouette, while the crystal crown and chandelier earrings bring in a regal touch. Surrounded by a gothic-inspired backdrop, the whole look feels like it was made for an enchanting Halloween night.
I think this outfit is incredibly chic. The dark shimmer makes it mysterious yet glamorous, and the crown instantly gives it queenly energy. I love how it feels powerful without losing its elegance, making it one of those mermaid costumes that you know will turn every head in the room.
Playful Turquoise Mermaid Outfit
This costume shines with a turquoise scale skirt paired with a strapless corset-style top that brings out the classic mermaid silhouette. Layered pearl necklaces and chunky ocean-inspired jewelry give it a fun, boho twist, while her ombré blue-green hair makes the whole look pop. The smoky Halloween backdrop with a bubbling cauldron adds the perfect spooky edge to this otherwise cheerful costume.
I think this outfit is such a fun take on mermaid style. The bold hair color paired with the pearls makes it feel playful and unique, and I love how it mixes glam with a touch of witchy Halloween vibes. It’s one of those costumes that makes you smile the second you put it on, and it feels perfect for anyone who loves a little sparkle with their spooky season.
Simple Pastel Mermaid Outfit
This costume keeps things light and whimsical with a pastel sequin skirt that glimmers in shades of pink and lavender. The look is paired with a simple white crop top, decorated with shell details at the waistband for that ocean-inspired touch. Her loose waves and delicate jewelry finish the outfit, making it feel effortless yet perfectly themed for a mermaid Halloween style.
I think this look is such a sweet option. The pastel shimmer is playful without being too flashy, and the seashell accents make it feel creative and fun. I love how it shows that you don’t need an over-the-top gown to pull off a magical mermaid vibe. It’s the kind of costume that feels relaxed, pretty, and super easy to wear for a night of fun.
Sparkly Blue Mermaid Costume
This outfit shines with a glittering turquoise sequin skirt that flows into a classic fishtail shape, paired with a matching seashell-style top. Her long red hair adds a bold contrast, making the whole look pop against the glowing lanterns and Halloween décor. The setting gives it a magical underwater vibe while still keeping it festive for spooky season.
I think this costume is such a gorgeous take on the mermaid theme. The sparkly blue sequins make it feel vibrant and fun, and the red hair brings in that fairytale mermaid energy we all love. It’s playful, glamorous, and one of those looks that instantly makes you feel like you’re ready to light up the party.