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From frozen towels to handheld fans: the products Which? experts rely on during a heatwave
Lars is a bloodhound when it comes to sniffing out bargains, including on major sales events such as Black Friday and Amazon Prime Day. He is also handy at unravelling tech jargon and anything related to gaming.
If you were sweltering during this recent heatwave, now's your chance to prepare for the next one.
We've spotted handheld fans, ice packs and unconventional products that should help you beat any heatwave without breaking the bank.
Read on to view our expert picks, verdicts, and get the best prices.
Looking for a bargain? Read our round-up of the best deals we spotted this month, or read up on the best John Lewis deals
What makes Which? deals different?
Retailers sometimes use misleading ‘was’ and ‘before’ prices to claim their deals are good. Media sites and artificial intelligence (AI) promote deals from retailers – but do they always check/verify them first? We don’t just take retailers’ word for it, we track actual market prices over six months. We share cheapest and average calculations and evaluate products against strict performance benchmarks. So you get good quality at honest prices.
*References to ‘average price' and 'cheapest price' are based on Which? market knowledge and information supplied by our partners. Prices are checked for the six calendar months prior to publication. Not all retailers are included in our checks.
Top affordable picks to beat the heat
JisuLife Pro1S handheld fan
Average price in the past six months £73
Cheapest price in the past six months £53*
We like: 100 speed settings
We don't like: One of the most expensive handheld fans we tested
While agencies like the Met Office recommended avoiding travel during this most recent heatwave, if you do have to leave your home, you'd better leave armed with ways to beat the heat.
This handheld fan isn't cheap, but it features a 5,000mAh battery and 100 speed settings you can adjust with a scroll wheel. JisuLife claims it can last up to 40 hours on low speeds.
Does shelling out the extra pounds pay off? Find out in our JisuLife Pro1S handheld fan review.
How it helps during heatwaves
Our expert says
Handheld fans are a great option when you're out in hot weather, especially when the humidity is high and the air is still. It moves fresh air across your skin, evaporating sweat and helping your body regulate its temperature. To keep hands free, opt for a neck fan. It sits on your shoulders, perfect if you're carrying bags or doing some gardening. Because the fans sit close to your ears they'll sound louder than most handheld fans.
These are our seven top tips on how to stay cool without air conditioning
SleepSoul Nebula mattress
Average price in the past six months £242
Cheapest price in the past six months £189*
We like: One of the coolest mattresses we tested
We don't like: Might not be the best in the winter months
If you're a hot sleeper, a cold mattress is a must during the summer months. Foam mattresses can absorb a lot of heat, leaving you feeling too warm. A pocket-sprung mattress, such as this one from SleepSoul, can be a better choice, as it won't trap as much heat beneath you.
This mattress was rated as 'very cold' in our testing, despite it being topped with a few layers of foam. It's also breathable, which should help with any night-time sweating.
Read our SleepSoul Nebula double mattress review, or take a look at the other cooling mattresses from our tests.
How it helps during heatwaves
Our expert says
A mattress is a long-term investment. It should last you eight to 10 years, so choose wisely. If hot flushes are an issue, or you sweat easily while you sleep, a cold feel is non-negotiable. However, cooling is only half the battle — breathability is the other. Ensure the materials used are designed to wick away moisture and circulate air, not trap it around you. We've tested mattresses across all types that achieve both of these.
Is it worth spending £300 on a pair of sleep earbuds? We've taken a look at whether this tech leads to blissful dreams, or if you should put it to bed
Boots Soltan Protect & Moisturise Spray SPF30
Average price in the past six months £5.50
Cheapest price in the past six months £5.50*
We like: Spray format may make it easier to apply
We don't like: Don't forget to reapply it
If you're going to be outside at any point during a heatwave, it's extremely important to slather on some SPF so you don't get burned.
This Boots sun cream is an affordable option and claims to protect from both UVA and UVB rays - though you'll need to read our review to see if it delivered.
Read the Boots Soltan Protect & Moisturise review or compare all of our sun cream reviews.
How it helps during heatwaves
Our expert says
Effective use of sun protection is a multi-pronged approach. We recommend a broad-spectrum sun cream (to protect against UVA and UVB rays) with at least SPF30, used in conjunction with other methods, including covering up with a hat and sunglasses and staying out of the sun during the hottest part of the day. Don’t scrimp when applying sun cream – you need around seven teaspoons for your whole body – and reapply regularly, especially after sweating or swimming.
Our experts have weighed in on whether or not you should buy a portable air conditioner or a fan this summer
Koolpak Reusable Cold Packs
Average price in the past six months £12
Cheapest price in the past six months £10*
We like: Three come in each pack
Watch out for: They'll need time to get cold in a freezer
While these gel packs are typically used to keep food chilled in a cool box or for injuries and muscle soreness, they can also be a cheap way to keep you cool during a heatwave.
Once frozen, just hold them against your skin – preferably above an artery, such as on your neck or wrists – if it's too cold, wrapping it in a tea towel can make it more comfortable. They can also be warmed up in the microwave, which can help you stay warm when it gets colder again.
How it helps during heatwaves
Our expert says
You can buy reusable gel cold packs that you keep in the freezer. Wrap them in a tea towel or pillowcase before applying them to your skin – it's more comfortable that way. That said, I prefer filling a hot water bottle with water and popping it in the freezer, which also works. It stays cool for ages and helps me stay cool in the heat.
Dunelm Ultimate Cotton Towel
Average price in the past six months £2
Cheapest price in the past six months £1.50*
We like: Lots of sizes available
We don't like: Not suitable for ironing
It seems like an odd addition, but another cheap way to keep cool is to run a towel under cold water and wrap it around yourself. It may not cool you off as much as the other items in this round-up, but it works in a pinch. Another tip: wrap it around your feet, as the cooling your feet can reduce your overall body temperature.
If you're after extra towels to have on hand – which is never a bad idea – these Dunelm bath towels were among the cheapest we tested. You can get face towels for just £1.75, and bath towels cost around £16.
Read our guide on the best bath towels to see how they compare to more expensive sets.
How it helps during heatwaves
Our expert says
When it’s really hot, I wet a towel with cool water and wrap it around myself. It instantly helps to bring my body temperature down.
Are fans and air conditioners more expensive during heatwaves?
Which? writer and researcher, Patrick Gallagher, says:
'The price of air conditioners and fans doesn’t typically rise in hot weather, as retailers don’t usually adjust pricing with the seasons.
'What heatwaves do tend to affect is stock levels, with higher demand meaning some popular models can become harder to get hold of quickly.'
Is summer 2026 going to be hotter than summer 2025?
The Met Office's central forecasting has predicted that 2026 will be one of the hottest years since 1850.
It will be roughly the same (if perhaps slightly cooler) than the record-breaking highs we saw in 2024. The Met has forecasted that temperatures in 2026 will be around 1.4°C higher than preindustrial levels, on average, which means we're likely to see more heatwaves in the summer months. For reference, we saw temperatures at 1.5°C above preindustrial levels on average in both 2024 and 2025.
