Summer Wedding Guest Formal Dresses
Serving looks hotter than the dance floor? You know it. Our summer wedding guest formal dresses are here to make you the best-dressed plus one—no bouquet catch required. Whether you're RSVP-ing for a rooftop soirée or a dreamy garden ceremony, these dresses bring main character energy with every twirl, toast, and Insta story. Get ready to turn heads and break hearts—because showing up in style is basically your superpower.
$59.90
A chic lavender satin dress with a form-fitting silhouette and high slit for upscale events.
$79.90
A burgundy strapless bodycon dress with faux pearl embellishments, mesh fabric, and a back slit.
$62.90
A chic green mermaid dress featuring a cold-shoulder design, sweetheart neckline, and high front slit.
$59.90
A light blue mesh formal dress with a square neckline, high side slit, and slim silhouette.
$39.90
A chic black crepe wrap dress with a plunging V-neckline and high front slit.
$69.90
A black floor-length formal dress with a glitter mesh overlay and spaghetti straps.
$109.90 - $149.90
A yellow mermaid dress with sequin-scroll pattern, V-neckline, and lace-up back for formal events.
$54.90
A brown mesh corset long dress with a sweetheart neckline and high side slit for formal events.
$49.90
A black crepe formal dress featuring a sleeveless square neckline and a high-cut front slit.
$29.97 $109.90 73% off
A dazzling yellow sequin-embroidered mesh dress with a mermaid silhouette and adjustable spaghetti straps.
$44.90
A sophisticated white midi dress with chiffon sleeves, a square neckline, and a ruched bodycon silhouette.
$77 $109.90 30% off
A green sequin scroll dress with a plunging V-neckline and open lace-up back.
$49.97 $119.90 58% off
A glamorous yellow mermaid dress featuring a sequin scroll pattern and an alluring lace-up back.
$54.90
An ivory satin midi dress with a corset seam bodice and pleated faux wrap hem.
$49.90
A coral satin mermaid dress featuring a lace-up back, high slit, and adjustable spaghetti straps.
$69.90
A sage satin strapless mermaid dress with a sweetheart neckline and floor-sweeping hem.
$64.90
A dreamy pink strapless mesh dress with asymmetrical ruffles and a high side slit.
$109.90
A stunning black sequin dress featuring a lace-up back, sweetheart neckline, and high front slit.
$69.90
A green satin formal dress featuring a cowl neckline, high slit, and slim-fit silhouette.
$59.90
A mauve floral mesh mermaid dress with a lace-up back, high slit, and floor-length hem.
$19.97 $54.90 64% off
A burgundy formal dress with sheer mesh, bell sleeves, and a high-side slit for elegant occasions.
$64.90
A sage satin mermaid dress featuring a lace-up back and elegant floor-length hem.
$69.90
A lavender mesh off-the-shoulder dress with ruched seams and a mermaid silhouette for formal events.
$59.90
A lime yellow formal mermaid dress with ruched mesh design and adjustable spaghetti straps.
$14.97 $74.90 80% off
A glamorous gold satin formal dress featuring a V-neckline, waist cutout, and high side slit.
$79.90
A light blue mesh mermaid gown with faux pearl embellishments and a flattering sweetheart cowl neckline.
$89.90
A glamorous yellow mermaid dress with glitter knit fabric, ruching, and a stylish lower back cutout.
$39.97 $109.90 64% off
A yellow satin A-line gown with cold shoulder design, front slit, and hidden side pockets.
$59.90
A dazzling yellow glitter knit formal dress with a high slit and floor-length silhouette.
$29.97 $89.90 67% off
An orange bodycon dress with glitter polka dots, lace-up back, and adjustable spaghetti straps.
$69.90
A mauve glitter mermaid dress with adjustable straps, perfect for weddings and formal events.
$74.90
A chic brown satin dress with a cold shoulder design and ruched mermaid silhouette.
$59.90
A navy blue strapless column dress in slinky knit fabric with pleated seams and a high side slit.
$159.90
A stunning yellow strapless formal dress with beaded mesh fabric and a high front slit.
$74.90
An elegant red glitter knit mermaid dress with an off-the-shoulder neckline and high front slit.
$59.90
A sleek eggplant column dress with a cutout accent and high side slit for sultry allure.
$59.90
A black crepe mermaid dress with a square halter neckline and elegant high front slit.
$74.90
A burgundy satin formal dress featuring a cowl neckline, waist cutout, and thigh-high slit.
$69.90
A captivating denim satin formal dress featuring an off-the-shoulder neckline and alluring front wrap slit.
$79.90
A striking navy blue mermaid dress featuring a lace open back and side ruched seams.
$69.90
A rust knit mermaid dress featuring a halter V-neckline and striking strappy open back design.
$14.97 $109.90 86% off
An orange sequin bodycon dress with a high neckline, open back, and high front slit.
$59.90
A sage satin slim-fit formal dress featuring a corset bodice, faux wrap-front, and ruched detailing.
$89.90
A dazzling gold mermaid dress with a lace-up back, high slit, and glitter knit fabric.
$89.90
A sultry green satin mermaid dress featuring a lace corset bodice and high front slit.
$54.90
An ivory floral satin dress with a lace-up back and flirty A-line silhouette.
$69.90
A sage satin strapless column dress with a chic pleated neckline and high side slit.
$42.90
A navy blue velvet midi dress with a sleeveless sweetheart neckline and pleated bodice.
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Chic and glamorous, the Rowena sequin mermaid long dress will stylishly elevate your formal night-out look. With a lace-up strap design and fitted mermaid silhouette with a high slit, you'll deliver stunning style. Fit & FeaturesSheer mesh fabric, knit lining, moderate stretch, embroidered sequin scroll design, Sleeveless square neckline, padded bust, Spaghetti straps, open back, lace-up strap design, tie closure, Lower back zipper with hook and eye closure, High waist seam, Fitted floor-length mermaid silhouette, high front slit, Runs true to size, Where to Wear:Prom, black-tie parties and galas, fancy engagement parties Free Shipping on All Orders Over $75. | Windsor Rowena Sequin Mermaid Dress in Navy Blue | Size: M | Knit Fabric/Mesh Fabric/Sheer Mesh Fabric
Effortlessly elegant, the Sophie glitter knit mermaid dress would be a stunning choice for a formal gala. She features a square neckline, short puff sleeves, a partially open back with a lace-up strappy design for a customized fit, a high waist seam, a floor-length hem, and a mermaid silhouette with a high front slit to showcase your heels. The glitter knit fabric offers a moderate stretch. Complete the look in this long dress with rhinestone statement earrings. Fit & FeaturesSquare neckline, Short puff sleeves, Open back, lace-up strappy design, tie closure, High waist seam, Floor-length hem, mermaid silhouette, front slit, Glitter knit fabric, moderate stretch, Sticky bra or pasties recommended, Runs true to size, Free Shipping on All Orders Over $75. | Windsor Sophie Glitter Knit Mermaid Dress in Navy Blue | Size: S | Knit Fabric/Rhinestone
The Gwendolyn glitter knit bow-back mermaid dress will have you sparkling up the night with a glamorous allure! Make your entrance in this floor-length gown designed to turn heads with a curve-flaunting mermaid fit and backless design. Fit & FeaturesGlitter knit fabric, moderate stretch, Square neckline, spaghetti straps, Backless design, high waist seam, Bow-back accent, floor-length train, Floor-sweeping hem, mermaid silhouette, Runs true to size, Extra glitter for maximum sparkle - may have some natural fallout, Where to Wear:Weddings, black tie galas, formal dances, big birthday events, rehearsal dinners, engagement parties, red carpet occasions, upscale glam parties Free Shipping on All Orders Over $75. | Windsor Gwendolyn Glitter Knit Bow-Back Mermaid Dress in Black | Size: S | Knit Fabric
The Lucille formal satin dress will have you looking and feeling radiant and luxe! The dress captivates with a lace-up back, mermaid silhouette, and high front slit for effortless allure. Fit & FeaturesLined satin knit fabric, minimal stretch, Sleeveless square neckline, padded bust, adjustable spaghetti straps, Open lace-up back design, zipper and hook-eye closure, Fitted bodice, front ruched seam, high-cut slit, Mermaid silhouette, floor-length hem, Runs true to size, Where to Wear:Prom, weddings, bridesmaids, black tie galas, red-carpet events, nights at the opera or theatre, big milestone celebrations Free Shipping on All Orders Over $75. | Windsor Lucille Formal Satin Mermaid Dress in Coral | Size: L | Knit Fabric/Satin Fabric
Make it an elegant entrance in the Priscilla formal satin dress with a curve-hugging mermaid silhouette and floor-sweeping hem for dramatic flair. Fit & FeaturesLined silky satin fabric, minimal stretch, Strapless sweetheart neckline, Pleated, lightly padded bust, non-slip grip lining, Slim-fit bodice, high waist seam, hip-hugging fit, Floor-sweeping hem, mermaid silhouette, Runs true to size, Where to Wear:Prom, weddings, bridesmaids, black-tie galas and events, and fancy milestone celebrations. Free Shipping on All Orders Over $75. | Windsor Priscilla Formal Satin Strapless Mermaid Dress in Sage | Size: L | Satin Fabric
Spend an evening in the timeless elegance of the Alicia floor-length formal dress and feel like a work of art! The side ruched seams accentuate your curves along the mermaid silhouette, and the high front slit adds a touch of drama to the floor-length hem. Fit & FeaturesSmooth knit fabric lined with stretchy knit, Padded bra cups, Back zipper and hook-eye closure, High front slit, Mermaid silhouette, Runs true to size, Where to Wear:Prom, galas, black tie parties, weddings, bridesmaids, nights at the theatre and opera, red-carpets Free Shipping on All Orders Over $75. | Windsor Alicia Off-The-Shoulder Mermaid Formal Dress in Brown | Size: M | Knit Fabric
Flattery will get you everywhere in the Delia formal long dress that boasts a flattering mermaid silhouette with a high front slit for effortless allure all evening! Fit & FeaturesLined smooth knit fabric, moderate stretch, Sleeveless cowl neck, pleating, Spaghetti straps, lace-up back, Mermaid silhouette, High front slit, floor-length hem, Runs true to size, Where to Wear:Prom, weddings, bridesmaids, engagement parties, rehearsal dinners, milestone celebrations, dinner parties, and dressy date nights. Free Shipping on All Orders Over $75. | Windsor Delia Formal Cowl Neck Long Dress in Mauve | Size: XL | Knit Fabric
Stun in the Shay formal glitter dress that makes your entrance that much more glam! Shay features a mermaid silhouette that flaunts your beautiful curves and a floor-length hem for a hint of drama. Fit & FeaturesLine glitter lurex fabric, V-neckline, padded bra cups, Adjustable spaghetti straps, Ruching, mermaid silhouette, Wide banded hem, train , Runs true to size, Extra glitter for maximum sparkle - may have some natural fallout , Where to Wear: Prom, black tie galas and events, red-carpet events, upscale birthdays Free Shipping on All Orders Over $75. | Windsor Shay Formal Lurex Glitter Dress in Rose Gold | Size: XS
Prepare to make a grand entrance in the Ashelyn glitter long formal dress looking like a true masterpiece for prom or special birthday events! Her luxurious knit fabric boasts a mesmerizing glitter pattern, while the side ruching and mermaid silhouette accentuate your curves while the high front slit shows off your shoes of the night. The cowl neckline and padded bra cups offer a flattering and comfortable fit. Style this formal gown with glam earrings and a hair accessory for a stunning look all evening! Fit & FeaturesGlitter pattern, knit fabric lined with jersey knit, Padded bra cups, Adjustable spaghetti straps, High front slit, Back zipper and hook-eye closure, Mermaid silhouette, floor-length, Runs true to size, Free Shipping on All Orders Over $75. | Windsor Ashelyn Cowl Neck Glitter Mermaid Formal Dress in Black | Size: XS | Knit Fabric
Sleek and sophisticated! The Emmie satin formal dress exudes elegance with a lace-up back and flattering mermaid silhouette that accentuates your figure. Fit & FeaturesStretchy satin-knit fabric, lined bust, Spaghetti straps, V-neckline, Lace-up back, Mermaid silhouette, floor-length hem, Runs true to size, Where to Wear:Prom, black-tie galas, weddings, bridesmaids, formal parties, and red-carpet events. Free Shipping on All Orders Over $75. | Windsor Emmie Lace-Up Mermaid Satin Formal Dress in Sage | Size: XS | Satin Fabric
Summer Wedding Guest Formal Dresses
When those RSVP cards hit your mailbox and the group chat starts buzzing, you know it’s time to hunt for that perfect formal summer wedding dress—the one that’ll have you feeling like the main character (even if you’re not the one saying “I do”). Shopping for wedding guest dresses Windsor girls love is all about finding the vibe that matches your energy and the event. Maybe you’re heading to a dreamy garden soirée, a rooftop bash with city views, or a classic ballroom affair—each one calls for a look that’s equal parts wow and “where’d she get that?” Think flowy silhouettes that catch the breeze and shimmer in the sunlight, luxe fabrics that feel as good as they look, and colors that pop in every candid and dance floor selfie. Whether you’re the BFF who’s been there since day one, the cousin who always brings the party, or the plus-one who’s about to make a killer first impression, a windsor wedding guest dress lets you show up with confidence and a little cheeky sparkle.
Choosing summer formal dresses for wedding celebrations is all about balancing glam with comfort, because let’s be real—no one wants to be fussing with their outfit when the playlist hits your song. Look for breathable fabrics that keep you cool while you’re tearing it up on the dance floor, and details like adjustable straps, open backs, or a thigh-high slit that bring the drama without sacrificing movement. If you’re shopping for yourself, this is your moment to pick a style that feels unapologetically you—maybe something with a bold hue, a little shine, or a unique cut that stands out from the sea of neutrals. And if you’re gifting a formal summer wedding dress to your ride-or-die, you already know her style—help her step into the spotlight with a look that’ll have her feeling like the best-dressed guest. Windsor wedding guest dresses are made for making memories, from the first toast to the last dance, and they’re designed to keep you glowing all night long (even after the flash goes off).
The best part? With so many options, you’re never stuck with a cookie-cutter look. Whether you’re a lover of classic elegance, obsessed with romantic details, or ready to shake things up with a bold trend, there’s a Windsor wedding guest dress that’ll match your mood and the dress code. Don’t forget to finish your look with statement earrings, a cute clutch for your essentials, and shoes you can actually dance in—because the only thing you should be worried about is catching the bouquet, not a wardrobe malfunction. If you’re already planning your next RSVP, check out our Spring Wedding Formal Dresses for more inspo and styles that keep the celebration going year-round. At the end of the day, it’s all about showing up, showing out, and making every wedding moment one for the books—because you deserve to feel like the VIP you are.