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15 September 2021

Best mattress deals for 2021

Best mattress deals, including pocket spring, memory foam and hybrid mattresses from a range of brands, such as Emma, Eve, Simba and more, carefully selected by Which? mattress experts
Lisa Galliers

With so many deals around, it can be hard to know which ones are actually worth it, and when it's the best time to buy, especially when we are bombarded with discounts throughout the year. 

Whether you want a traditional pocket-sprung mattress, a memory foam mattress or maybe something in between, such as a hybrid mattress, we can help.

Our expert pick of the deals available this month, of some of the most popular brands, will help you find a mattress without paying over the odds, perfect if you're on a budget, or just want to save some cash. And if you're not quite ready to buy, read on for our top deal-spotting tips.


Need to update a sagging old mattress but unsure how to choose a new one? Discover how to buy the best mattress.


Best mattress deals for September 2021

Our mattress experts have been keeping a close eye on the mattress deals popping up over the past months to bring you this round-up of the best mattress sales we've spotted on some of the most popular mattress brands searched for. 

Each mattress listed below has scored well in our independent tests. But, to find the very best and make sure the mattress you choose is right for your specific needs, check our thorough mattress reviews before you buy. 

Don't forget to check the small print if you're buying a mattress with a sleep trial nights offer. See how many nights are on offer and what you need to do to return the mattress.  

1. Emma The Original mattress: 45% off

The Emma Original mattress
  • We like Can be used on most bed bases, not too warm to lie on, 200-night trial, doesn't need to be turned
  • We don't like Only available online

Emma's Early Autumn Sale is offering up to 45% off, with 40% off the Emma Original mattress and it's for everyone, not just for new customers. This brings the usual price (£699) down to £419.40, which isn't the cheapest we've seen it, but it's just under £35 off the best price we've seen, so it's not a bad deal.  

The mattress is made up of a 19cm foam core, with an additional 2cm layer of memory foam and 4cm layer of ordinary foam, and it's not too warm to lie on. 

Read our full review of the Emma Original mattress.

Or buy it now at Emma.

2. Memory Foam Warehouse Coolmax Hybrid: £100 off

  • We like 100-night sleep trial, washable cover
  • We don't like Memory effect is high, which some people may not like

Currently, Memory Foam Warehouse is offering this double mattress with a discount of £100, bringing the usual price (£459.99) down to £359.99, which isn't as good as the discount that's just ended, but it's not bad. 

This mattress uses a mix of pocket springs, memory foam and foam. There's a 17cm foam base, with a 4cm layer of pocket springs, and a 3cm layer of memory foam on top, which the manufacturer claims will provide the ultimate comfort. But will be a dream to sleep on?  

Read our full Memory foam Warehouse Coolmax Hybrid review to find out.

Or buy it now at Memory Foam Warehouse.

3. Sealy Teramo 1400 mattress: 50% off

Sealy Teramo 1400 mattress
  • We like Doesn't need to be flipped, it's not too warm to lie on
  • We don't like It's heavy 

This Sealy pocket sprung mattress has been around for a fair few years, but if you're keen to step away from hybrid or foam mattresses it's worth a look. Also known as the Teramo 1400, Nostromo 1400 and Latex 1400, it can be hard to pin down the best deal.

For September, we've spotted it for £639.95 for a double (RRP stated as £1,216 on mattressonline.co.uk). While this isn't the cheapest we've seen this Sealy on offer, it's around £25 more, it's still a good chunk off the usual listed price, and it's cheaper than the £800 RRP listed by Next as full price.

It's made up of a pocket sprung core with a latex layer designed to improve comfort and support. This layer means the mattress doesn't need to be turned over, which is good, as it weighs 39kg. Sealy says this mattress is soft, and our independent firmness tests ranked it as an eight, where one is the firmest and 10 the softest. 

Read our full Sealy Teramo 1400 mattress review to see if it's the perfect match for you. 

Or buy it at mattressonline.co.uk now.

4. Eve The Original Hybrid: 20% off

Eve Original Hybrid mattress
  • We like It's not too warm to lie on, doesn't need to be turned, 100-night trial
  • We don't like It's heavy

This hybrid mattress from Eve Sleep is made up of an 11.5cm pocket-spring core, on top of which sits four different layers of foam, including a memory foam layer. The mattress cover is moisture-wicking, says Eve, so this should help prevent you getting hot or clammy. 

Eve Sleep's discount for its Original Hybrid has now dropped to 20% off the double mattress, but you can now only get this discount if you spend over £450 and use the code TAKE 20. This brings the cost back down to £615.20 (from £769). Generally the discount on this mattress has been around the 30% mark, so 20% is not the best deal we've seen, it's over £76.80 more expensive than the Bank Holiday deal. 35% is the biggest discount we've spotted so far this year. 

If you're after an Eve mattress, we say hold fire and wait for a better deal.

Read our full Eve The Original Hybrid mattress review.

Or buy it at Eve Sleep now.  

5. Nectar memory foam mattress: Save £419.85

Nectar mattress
  • We like: 365-night trial offer, extra-long warranty
  • We don't like: Feels warm to sleep on

You'll no doubt have seen the Nectar mattress splashed about social media, and hot on the heels of the 36% off bank holiday discount, Nectar has another deal for you. At the moment, for a double, the price is £594.15 (down from £699), but this price also includes a range of free gifts, so you'll get two premium pillows, a mattress protector, a sheet set and a duvet. Nectar says this bundle is usually worth up to £315. This offer is only available until October 5th.

Made up of a large 16.3cm foam core, topped with 3cm of memory foam and 2cm of foam topped off with a quilted cover, this foam mattress feel warms to lie on, so may not be the best choice if you prefer a cooler feeling mattress. Is this the perfect mattress for all sleeping positions? 

Read our full Nectar Sleep memory foam mattress review.

Or buy it now at Nectar.

How to get the best deals on specific mattress brands

Are you desperate for an Emma mattress, or have your eye on a Simba? Or do you want to swap your old mattress for a new memory foam mattress? It's worth keeping an eye out for mattress sales on your chosen brand's website. Social media is usually also a good place to spot a deal. 

There are plenty of deals and offers popping up throughout the year. But, be warned, the deals may not be offered on the particular mattress you want, if you have a specific one in mind, so check the T&Cs.  

Make sure you're prepared when the discounts start. Compare mattresses to find out which mattresses will be a dream and which ones could turn into an expensive nightmare, and don't forget mattress retailers may have other sales happening in-store. 

Dormeo mattress deals

You may have spotted Dormeo mattresses on TV, or ads popping up on Facebook, and generally we've seen a range of deals on offer. Last Easter it was offering free gifts such as pillows and duvets on top of existing sale reductions. And, although its mattresses can be found through other retailers, in the past we've noticed that buying direct from Dormeo can sometimes save you a small amount in addition to any free gifts it may be offering. This means it's worth checking out its website as a starting point, before comparing deals. Over the past year we've seen sales with up to 60% off.

Read our Dormeo mattress reviews

Emma mattress deals

The Emma mattress is one of the most popular reviews on the Which? website. This bed-in-a-box brand delivers its rolled-up mattresses direct to your door and offers a sleep trial (currently 200 nights). There are three mattresses in its range and, from what we've seen, a variety of deals are available during different months, so it's worth keeping an eye on the website or on social media. We've seen discounts up to as much as 45%, so this is a good guide if you're after an Emma mattress but aren't sure when to take the plunge.

Read our Emma mattress reviews

Eve mattress deals

Eve is another bed-in-a-box mattress brand. Mattress deals can be found on the brand's Eve Sleep website, or via some retailers, such as Next. Similar to Emma mattresses, Eve also offers trial nights so you can try the mattress. Currently there is a 100-night trial, and if you don't love the Eve mattress you can send it back free of charge. 

Be warned: if you buy an Eve mattress via another Retailer, such as Argos, the Eve trial nights offer doesn't apply. Check before you buy.

We've seen deals ranging from 20% to 30% off, but offers can be on certain mattresses only, so check the T&Cs before you buy. 

Read our Eve mattress review

Ikea mattress deals

You might not see Ikea mattresses discounted, but that's because these budget-friendly options are generally good value even when bought at full price. We've tested 13 Ikea mattresses, ranging from as little as £99 up to over £600, with an average price of just £284. Some of them even make the grade as a Best Buy.

Read our Ikea mattress reviews

Simba mattress deals

Simba mattresses arrive vacuum-packed in a box to your door, and the three mattresses currently in its range come with a 200-night trial. Simba offers free returns, and its website states that it won’t ask you to get the mattress back in the box for the return journey. We've spotted a range of deals from Simba, offering between 25% and 35% off, but sometimes we've spotted there's some sort of condition, such as a minimum spend or a discount on a particular mattress.

Read our Simba mattress reviews

couple mattress shopping

When and where are the best mattresses on sale? 

A decent mattress is key to getting the support you need, but don't lose sleep if your mattress budget isn't that big. As we've mentioned above, brands seem to have a fair few sales sprinkled across different months, but retailers will also offer their own mattress deals throughout the year. We've listed some below to get you started.

Argos mattresses

Bensons for Beds mattresses

Dreams mattresses

Furniture Village mattresses

John Lewis mattresses

Mattress Online mattresses

Black Friday sales

Black Friday mattress deals

The best time to buy a cheap mattress? Not necessarily. A new mattress can be an expensive purchase, but it’s always worth shopping around to find a bargain. 

While you’ll see a flurry of special offers and discounts as the annual Black Friday period approaches, not all Black Friday deals are good value. 

We spotted the best deals, for some brands, during August bank holiday weekend, beating the discounts given last Black Friday.  And some deals offered around Easter 2021 that matched those promoted for Black Friday.

With this in mind, don't rush into buying anything just to make the most of the 'sale' price. Some brands seem to have deals on all the time. 

Big sales periods include Easter, Christmas , the new year and bank holidays. This year we've even seen deals tied into Valentine's Day, Father's Day, Summer and even back to school time. Provided your current mattress is still serviceable, it’s worth waiting to find a mattress that will improve your quality of sleep for years to come, and a price that will save you some money, or a deal where you may get a few freebies thrown in.

Whatever you buy, it won’t matter how much money you’ve saved in a Black Friday deal if the mattress you end up with isn’t suitable for how you sleep. Read our mattress reviews to find the perfect mattress for you.

Prices and deals correct at the time of publication. Deals and prices may change at short notice.