The sun is out, which means wedding invitations are rolling in — and we at Trendii know that everyone, from the begrudging bridesmaid to the unassuming plus-one, only wants one thing: a dress to impress. Our sincerest apologies to the happy couple for this sobering reality.

That said, there’s (ironically) no one-size-fits-all formula — but no stress, we’ve got you. This summer, it’s all about breathable fabrics, thoughtful styling, and nailing the dress code without sacrificing comfort.

So, here’s our guide on what to wear to a summer wedding in 2026.

Fabrics

To begin with, we want to focus on natural fibres, and with that, our trinity for breathable fabrics this summer is: silk, linen, and chiffon. All three are light, breathable, and don't trap moisture.

Come nightfall, follow the above, but add a layer. Pashminas and cardigans are not only the flavour of the season, but they’re also perfect for when the temperature drops. Alternatively, look for a breathable jacket using the above fabrics.

Nothing ruins a summer wedding look faster than synthetic fabrics under the blazing Aussie sun, so skip rayon, polyester, acrylic, and nylon. Other fabrics to skip? Wool, denim, and leather. These fabrics are quite heavy, trap heat, and leave you feeling sticky.

Keep it airy and comfortable, because nobody wants a pit-stain panic halfway through the bouquet toss.

Black tie

Black tie is a pretty standard affair for a wedding, but here is the inside scoop on how to do it in the summer of ‘26.

Floor-length gowns are a go-to, but this summer I recommend a silk or satin slip dress—especially in lighter shades that reflect heat rather than trap it. Cute yet genuinely practical, butter yellow is having a moment again, thanks to the resurgence of Kate Hudson’s iconic How to Lose a Guy in 10 Days dress.

Tuxedos and suits get a big tick for black tie, but let’s be honest—summer heat is unavoidable. That’s why fabric is everything: opt for lighter, breathable materials that won’t leave you melting before the first toast.

When it comes to picking the perfect outfit, this summer we are seeing a rise in block colours with a focus on accessorising well. We are leaning into fresh summer tones of baby blue, lime green and butter yellow. And we are elevating with statement jewellery - whether that is a chic watch, a stack of necklaces or a statement bag. Footwear that we can expect are heels, ballet flats and formal boots. Accessories are having their moment, and their power should not be overlooked.

couple at wedding in a maxi green dress and blue suit — Source: Pinterest

sofia grange and husband elliot wearing black tie and maxi black dress — Source: Pinterest

couple at formal wedding wearing gold satin dress and blue suit — Source: Pinterest

woman wearing formal black jumpsuit — Source: Pinterest

Cocktail

Cocktail attire: the dress code that keeps wedding guests up at night. What to wear, how to accessorise, and how not to overdo it — let’s break it down.

Think formal-adjacent. Cocktail attire still leans towards chic and elevated, but with more room to have fun. Look for hemlines that sit between the knee and midi length, or opt for a tailored jumpsuit for a modern twist.

For our masculine readers, smart dressing is still key. While ties are optional, a well-fitted suit paired with a crisp shirt will always look polished. One rule remains non-negotiable: no jeans.

When it comes to choosing your outfit, there’s plenty of room to play. Summer favourites like pastels and florals are always a safe bet, and this dress code allows you to lean into your personal style while still looking event-appropriate.

woman wearing brown midi dress — Source: Marie Claire - Launchmetrics

two men at a wedding wearing linen suits — Source: Pinterest

couple at a semi formal wedding woman in pink maxi satin dress man in suit — Source: Sunnderly

model wearing green chartreuse dress midi — Source: Pinterest - Bohemian plus

Casual

Make no mistake, while the dress code is casual, we are not showing up in sweatpants and a T-shirt. In the hierarchy of dress codes, casual or come-as-you-are is often noted as a step or two down from cocktail. We still want an elevated look that shows respect for the happy couple on their big day. What your host is really saying is the best dress is the one you likely already own.

So what are we wearing?

Casual dress codes prioritise comfort while still looking polished. It can feel like a tricky balance, but chances are you already dress this way most weekends—think dinner party rather than day at the beach.

With that said, the usual no-nos still apply: no jeans, thongs, T-shirts, or athletic footwear unless your hosts have explicitly said otherwise.

When shopping (or pulling from your wardrobe), look for breathable linen fabrics and lean into brighter hues. Florals remain a summer favourite, but polka dots are also making a big comeback. Garden-party midi dresses get a big tick, but mini dresses are also allowed—as long as they’re tasteful and elevated rather than casual or party-club style. Chinos paired with a crisp button-up are a polished choice for men or anyone who prefers separates.

The good news is that heels and ties are not mandatory either!

Source: Elle Au - House of CB Elia Midi Sundress

woman wearing blue mini floral dress — Source: Buzzfeed - *Abercrombie*

man wearing navy blue short sleeve button down shirt and white trousers — Source: Southern Taylor

A Note on Cultural & Traditional Weddings

If you’re attending a cultural or traditional wedding, the best thing you can do is ask. Reach out to the host—or someone close to them who understands the customs—for guidance on what’s respectful and appropriate. This isn’t the moment to guess; a quick conversation will not only help you dress correctly, but you’ll likely learn something meaningful in the process.

Final Styling Advice

And finally, one last piece of advice: please, please, please don’t wear white! No matter the dress code, season, or venue, white is reserved for the couple. When in doubt, choose literally any other colour.

With that, you’re officially ready to celebrate in style—cheers to the happy couple!