I don't mean to brag, but this summer I have been booked and busy. From weddings to graduations, christenings and birthday parties, my event calendar has never been so full. Nice in theory, but I must admit it has tested me sartorially with each weekend throwing up the same wardrobe dilemma: what to wear?
Buying a new dress for each occasion is out of the question. Not only would it send me (further) into my overdraft, in an era of Vinted and Vestiare, it's the furthest thing from chic. Yep, in case you missed the memo, outfit repeating is not only accepted, but encouraged. Especially when the guest list differs for each event.
All you need is two or three standout styles, and you're set for the summer season. Luckily, the occasion dress trends in SS25 more than deliver. From the most popular prints to the only colour worth investing in, we've rounded up the five biggest occasion dress trends that will guarantee you the title of best dressed guest.
Polka dots
You don't need us to tell you polka dots have been the print of the season when it comes to occasion wear. Coming in a range of different spotted colourways – all of which are chic AF – it's a great option for those who usually stick to neutrals to feel like they're making an effort for the event, without stepping too far outside of their comfort zone.
Butter yellow
Every year, there is a standout bridesmaid dress colour. Previously, it has been sage green. In 2025, that colour is butter yellow. Unsurprisingly so, given the sherbert shade's popularity over the summer season. Working just as well for summer parties and any other occasion on your social calendar, this sunshine hue is sure to bring a sense of cheeriness to proceedings – and what's more summery than that?
Drop waists
Okay, so we've covered both the print and colour of the season, which brings us nicely to the stand-out silhouette. For summer 2025, it's all about the drop waist dress. Despite initial doubts, this is actually a universally flattering style for every body. Plus, it comes in an array of colourways, prints and finishes so there really is a drop waist dress for everyone.
Never Fully Dressed Green Shirred Nara Dress
Summer black
No matter what the It colour of the szn is, fashion's love affair with black is never-ending. Even in summer. Yep, we're throwing out the style rule book and wearing black summer dresses and even black occasion wear dresses too, because yes, once and for all, you CAN wear black to a wedding!
Nightie dress
A little bit boho, a little bit grunge, and a lot inspired by the underwear-as-outerwear trend, the nightie dress is big news this summer. The key to making the look work for more formal occasions is to stick to lace-trimmed camisole dresses in luxe fabrics like satin and silk. Style with barely-there heeled sandals and delicate jewellery and you're good to go, whatever the event – summer date night, wedding guest dress, you name it.
Nobody's Child Brown Satin Lace Solene Maxi Dress
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Alexandria Dale is the Digital Fashion Writer at Cosmopolitan UK. Covering everything from the celebrity style moments worth knowing about to the latest fashion news, there’s nothing she loves more than finding a high street dupe of a must-have designer item. As well as discovering new brands, she’s passionate about sustainable fashion and establishing the trends that are actually worth investing in. Having worked in fashion journalism for six years, she has experience at both digital and print publications including Glamour and Ok!
