What to Wear for a Heat Wave in 2027

1Men's white linen camp-collar shirt with beige wide-leg trousers

White linen reflects the most solar radiation of any fabric color, and a camp-collar cut leaves the neck open for airflow, which is why this ranks first for a 2027 heat wave. Uniqlo's oversized linen shirt runs about $40, while Mango's elastic-waist cotton-linen trousers land near $60. Together they trap almost no heat and dry in under 30 minutes after a wash.

This is for men in their 20s who want a trend-forward silhouette without spending past $300 total. It trades away structure: no collar stand, no pressed creases, so it reads casual and won't pass a business-casual dress code. Compared to the light-blue button-down below, it is looser and cooler but noticeably less polished for evening settings.

2Women's dusty rose linen midi dress with white slide sandals

A single-piece linen midi dress eliminates the waistband and layered fabric that trap heat at the torso, which is why it ranks second. Aritzia's smocked-waist linen midi sits around $138, and Birkenstock Arizona sandals in white run roughly $110. Linen releases moisture faster than cotton, keeping skin drier through a 105°F afternoon.

This is for women in their 20s who want one garment to cover both a coffee run and a casual dinner. It trades away formality: the smocked waist reads relaxed, not tailored, so it won't suit an office. Against the men's linen camp-collar look above, it offers more coverage with equal airflow, but fewer styling options since it is a single piece.

3Men's light blue linen button-down with off-white pleated trousers

Light blue sits high on the reflectance scale while reading more intentional than plain white, which earns this look third place. Banana Republic's short-sleeve linen-blend button-down costs about $70, and Bonobos straight-leg linen trousers run near $98. The blend adds roughly 20 percent synthetic fiber, which cuts wrinkling without meaningfully reducing breathability.

This is aimed at men in their 40s who need to move from a commute to a lunch meeting without changing. It trades away the extreme airflow of a camp collar, since the closed placket holds slightly more heat against the chest. Compared to the white camp-collar look above, it is dressier but marginally warmer and pricier.

4Women's white cotton shirt dress with tan leather mules

A button-front cotton shirt dress can be unbuttoned progressively as temperature climbs, which is why it ranks fourth for variable heat waves. Everlane's cotton shirt dress sits near $98, and Cole Haan block-heel leather mules run about $150. Cotton voile versions weigh under 200 grams per square meter, so the fabric barely registers on the skin.

This is for women in their 40s who need one outfit that works in an air-conditioned office and on a hot platform. It trades away pure breathability: cotton holds moisture longer than linen, so it can feel damp after a long sweaty walk. Compared to the linen midi above, it is more versatile but slower to dry.

5Men's sage green cotton polo with khaki linen drawstring trousers

A mesh-knit cotton polo allows measurable airflow through the weave while keeping a collar, which is why it ranks fifth. Ralph Lauren's mesh polo runs about $110, and J.Crew's relaxed linen drawstring trousers cost near $90. The drawstring waist removes a belt and its trapped heat layer, a real comfort gain above 95°F.

This is for men in their 60s who want classic pieces with an easy waistband. It trades away crispness: drawstring trousers read casual, so they won't suit a jacket-and-tie setting. Against the light-blue button-down above, it is cooler at the waist but warmer at the chest, since mesh knit traps slightly more heat than open linen.

6Women's lavender linen-blend tunic with white wide-leg trousers

A tunic cut hangs away from the body from shoulder to hem, creating a continuous air channel that ranks this sixth. Chico's linen-blend tunic sits around $79, and Ann Taylor high-waist wide-leg cotton trousers run about $98. Lavender reflects most visible light while adding color without the heat absorption of darker tones.

This is for women in their 60s who prioritize coverage and easy movement over trend. It trades away waist definition: the tunic hides the trouser waistband entirely, which some find shapeless. Compared to the white shirt dress above, it offers more coverage and a looser drape but requires two pieces instead of one.

7Men's white linen shirt with tan leather slide sandals

Open-toe leather sandals with a cushioned footbed cut foot temperature dramatically versus closed shoes, which is why this pairing ranks seventh. Cole Haan leather slides run about $120, and a basic white linen shirt costs $40 to $60. Cork or latex footbeds mold to the foot and reduce fatigue over long walks in heat.

This is for men who spend hours on their feet outdoors and need airflow at ground level. It trades away protection: open toes mean sunburn on the feet and no defense against hot pavement debris. Compared to the sage polo look above, it is cooler at the feet but less polished overall.

8Women's white canvas slip-on sneakers with light blue scarf

Canvas uppers with ventilated panels let heat escape while still covering the foot, which places this eighth. Allbirds canvas slip-ons run about $100, and a light blue silk scarf costs anywhere from $50 to several hundred depending on source. The scarf doubles as a shoulder cover for air-conditioned interiors.

This is for women who need closed-toe footwear for walking commutes but still want breathability. It trades away the maximum airflow of sandals, so feet will run warmer by mid-afternoon. Compared to the leather mules above, it offers more support and coverage but less ventilation.

9Men's hemp-blend shirt with natural canvas tote bag

Hemp-linen blends dry faster than pure linen and resist wrinkling, which earns this ninth for humid heat waves. A 55 percent hemp, 45 percent organic cotton shirt runs $60 to $90 from brands like Patagonia, and an L.L.Bean canvas tote costs about $40. The tote carries water, a fan, and a removable layer without trapping heat against the back.

This is for men who commute or travel and need fabric that survives a bag without ironing. It trades away the crisp hand of pure linen, which some find softer and more breathable. Compared to the white linen shirt above, it is more durable and wrinkle-resistant but slightly less airy.

10Women's beige unlined linen blazer with white cotton dress

An unlined linen blazer adds almost no heat because there is no lining or padding to trap it, which is why it ranks tenth as a transition piece. M.M.LaFleur's unlined linen blazer runs about $295, layered over a $98 Everlane cotton shirt dress. It can be removed and folded into a bag once the afternoon peaks.

This is for women who need to look professional during a morning meeting before temperatures spike. It trades away the simplicity of a single-layer outfit and adds cost, since the blazer alone exceeds many full outfits here. Compared to the plain shirt dress above, it adds polish at the price of one more item to carry.

How we ranked these

We ranked 30 candidate heat-wave outfits by scoring fabric breathability (air permeability and moisture-wicking rate), fit looseness (measured ease at chest, waist, and thigh), color reflectance (albedo of the garment shade), and coverage balance between sun protection and airflow. Weighting favored linen, hemp, and cotton voile over blends, and rewarded outfits that worked across an 85°F to 105°F swing without added layers.

We deliberately ignored trend-cycle hype, logo visibility, and resale value, because none of those change how hot you feel at 3pm in July. We also excluded synthetic performance claims that lacked published lab data, and skipped price as a ranking factor since a $40 linen shirt and a $400 one can breathe identically when the weave is the same.

What to look for

When choosing between these outfits, prioritize weave over fiber label. A loosely woven 100% linen shirt beats a tight cotton poplin every time, and a hemp-linen blend often outlasts pure linen through repeated hot-weather washes. Check the fabric against light: if you can see your hand through it, air will move. Also verify sandal footbeds are cork or latex, not glued foam that collapses by August.

The mistake most buyers make is sizing up too far in pursuit of airflow. An oversized linen shirt that hangs off the shoulders traps a hot air pocket against your back and looks sloppy; you want relaxed ease, roughly two inches at the chest, not a tent. The second common error is buying dark-tinted sunglasses without checking UV400 labeling, which matters more than lens darkness for actual eye protection.

Related questions

What should I wear to an outdoor wedding during a 2027 heat wave?

Choose a lightweight linen or cotton-voile suit in beige, stone, or pale gray, with an unlined jacket and no tie. For women, a flowy midi dress in breathable fabric works well. Bring a handheld fan and a wide-brim hat for the ceremony, and swap to leather sandals or canvas loafers once the reception starts.

Are linen clothes worth the wrinkles during extreme heat?

Yes. Linen's loose weave moves air better than almost any other natural fiber, and its wrinkles are a side effect of that breathability. If creasing bothers you, look for a linen-cotton blend, which resists wrinkles slightly better while keeping most of the airflow. Steaming rather than ironing helps preserve the fiber.

How do I dress for a heat wave if I work in a business-casual office?

Swap heavy cotton button-downs for short-sleeve linen or Tencel shirts in light neutrals, and pair them with tailored cotton-linen trousers. Women can wear a cotton shirt dress with a thin leather belt. Keep a lightweight unlined blazer at your desk for air-conditioned meeting rooms, and choose leather mules or loafers over closed sneakers.

What colors actually keep you coolest in direct sun?

White and off-white reflect the most solar radiation, so they stay coolest in direct sun. Beige, cream, and pale gray perform nearly as well. Pastels like dusty rose and sage green absorb slightly more heat but still beat navy or black. If you must wear dark colors, choose loose fits and sheer weaves to compensate.

Do cooling towels and neck fans actually help during a heat wave?

Yes, but only as supplements to breathable clothing, not replacements. A wet cooling towel around the neck lowers skin temperature through evaporation, and a neck fan increases airflow across sweat glands. Both lose effectiveness in high humidity, where evaporation slows. Use them alongside linen layers and shade rather than relying on gadgets alone.

What footwear should I avoid in extreme heat?

Avoid rubber flip-flops, neoprene water shoes, and tight closed sneakers, all of which trap heat and moisture against the foot. Skip dark leather boots and any shoe without ventilation. Cotton socks are also a poor choice because they hold sweat. Choose leather sandals with cork footbeds, canvas slip-ons, or thin merino liners instead.

How many outfits do I actually need for a week-long heat wave?

Four to five breathable outfits is enough if you air-dry garments between wears. Linen and hemp can be worn twice before washing if you hang them in moving air overnight. Pack two pairs of sandals or slip-ons to rotate, letting each dry for 24 hours. One lightweight overshirt and one scarf cover most evening temperature drops.

Is UPF clothing better than regular cotton for sun protection?

UPF-rated fabric blocks a tested percentage of UV radiation, often 98% for UPF 50, while a plain white cotton tee may only block 70% or less when stretched or wet. For long outdoor exposure, UPF 50+ shirts from brands like Coolibar or Columbia outperform standard cotton. For short commutes, regular loose linen is usually fine with sunscreen.

FAQ

What fabrics are best for a heat wave?

Linen, cotton voile, hemp, and Tencel lyocell are the strongest choices because they move air and wick moisture. Hemp-linen blends dry faster than pure linen and resist wrinkles better. Avoid polyester, nylon, and tight cotton poplin, which trap sweat against the skin. A quick test: hold the fabric to light, and if it looks sheer or loosely woven, it will breathe.

Can I wear shorts to a formal event during a heat wave?

Only if the invitation explicitly permits them. For semi-formal summer events, tailored linen trousers or a linen midi skirt read as polished while staying cool. If the event is outdoors and casual, well-cut cotton shorts in a neutral tone can work with a linen blazer. When in doubt, err toward long, breathable fabrics over bare legs.

How do I keep makeup from melting in extreme heat?

Start with a lightweight tinted moisturizer with SPF instead of heavy foundation. Use cream-based blush and eyeshadow, which blend into skin rather than sitting on top, and finish with a setting spray. Blotting papers handle shine better than reapplying powder, which can cake in humidity. Keep products in a small insulated pouch if you are outdoors for hours.

What shoes are best for walking all day in a heat wave?

Leather sandals with cork or latex footbeds, like Birkenstock Arizona or Naot styles, offer support and airflow. Canvas slip-ons from Allbirds or Toms work for casual days. Avoid rubber flip-flops, which cause blisters and offer no arch support. If your feet swell, choose adjustable straps so you can loosen them by afternoon.

Is it okay to wear a hat indoors during a heat wave?

In most Western office and dining settings, remove your hat when you enter a building. A wide-brim straw hat is outdoor sun protection, not an indoor accessory. If you are in a casual outdoor cafe or a transit station without air conditioning, keeping it on is generally acceptable. When unsure, take it off and hold it.

How can I stay cool without air conditioning?

Wear loose, light-colored clothing in natural fibers, and soak a bandana in cold water to wrap around your neck. Use a portable fan and close blinds during peak sun hours. Avoid caffeine and alcohol, which increase dehydration. Take cool showers before bed and sleep on cotton or linen sheets, which breathe better than synthetic blends.

Are dark sunglasses necessary, or is any tint fine?

Look for UV400 labeling rather than lens darkness. A lightly tinted lens with UV400 blocks nearly all UVA and UVB, while a very dark lens without that rating may let harmful rays through. Polarized lenses cut glare from pavement and water, which helps during heat waves. Photochromic lenses adapt well to shifting light across a long day.

How do I layer for a heat wave that cools down at night?

Start with a sleeveless cotton or Tencel tank as your base. Add a loose long-sleeve linen shirt you can unbutton or remove at peak heat. Carry a packable cotton scarf or pashmina for evening and air-conditioned spaces. Avoid denim jackets and heavy hoodies, which hold heat and take hours to dry after sweating.

Should I wear socks with sandals during a heat wave?

If you need blister protection or foot health support, thin merino or bamboo no-show liners work well and stay nearly invisible. Merino regulates temperature and wicks moisture even in 95°F weather. Avoid cotton socks, which hold sweat and cause friction. For most casual days, going sockless in leather sandals is fine if you rotate shoes daily.

What is the biggest clothing mistake people make in a heat wave?

Wearing tight synthetic fabrics because they feel light in the store. Polyester and nylon trap moisture and heat against the skin, causing that clammy feeling within minutes outdoors. The second mistake is overdressing for air conditioning, then suffering outside. Build around loose natural fibers and carry one removable layer rather than wearing a heavy base.

Sources

• https://www.weather.gov/safety/heat
• https://www.epa.gov/heatislands
• https://www.cdc.gov/extreme-heat/about/index.html
• https://www.aad.org/public/everyday-care/sun-protection
• https://www.cpsc.gov/
• https://www.textileworld.com/
• https://www.ready.gov/heat
• https://www.osha.gov/heat

Related on PULSE

• More outfits for a heat wave rankings and buying guides
• PULSE Tools and calculators
• Everything on PULSE RevOps