Best Mattress for Side Sleepers in the UK for 2026

General sleep-health guidance points most side sleepers towards a medium to medium-firm feel — roughly 5 to 7 out of 10 on the usual scale where 10 is firmest. The aim is a surface soft enough to let the shoulder and hip settle in and relieve pressure, but supportive enough that they don't sink so far the spine bends out of line. Lighter and petite side sleepers usually prefer the softer end of that range, while heavier side sleepers tend to need more support to avoid sagging. Firmness scales differ between brands — Emma, for instance, runs its own scale the other way round, with 10 as its softest — so use the numbers as a guide rather than an exact match.

Our top pick is the Emma Hybrid Airgrid, because its point-elastic AirGrid layer cushions the shoulder and hip with a soft, medium-soft feel while keeping the spine level, and it is the model UK reviewers name most often for side sleepers — it suits lighter and average side sleepers best. If you want deep, budget-friendly cushioning, the Nectar Hybrid's thick memory-foam comfort layer is the value choice, and if you're a heavier or combination sleeper who also lies on your back, the more heavily built Simba Hybrid Pro offers the strongest zoned support. The right one depends on your body weight and whether you sleep only on your side.

For the boxed hybrids in this guide, doubles are indicatively around £450 to £1,100 depending on the model and whether it's on offer, with the Nectar Hybrid usually the cheapest and the Simba Hybrid Pro the most expensive (RRP around £1,099). These brands discount heavily and often, so the RRP is rarely what you pay — it is worth waiting for a sale. All prices here are indicative and move constantly, so check the retailer before buying (figures checked September 2026).

Both can work well, and the difference is feel. Memory foam, like the comfort layer in the Nectar Hybrid, sinks slowly and hugs the body, giving deep pressure relief at the hips and shoulders that many side sleepers like — but it can feel harder to turn over on and sleeps warmer. Hybrids such as the Emma and Simba add pocket springs beneath the foam, so they cushion pressure points while pushing back more, which helps support, edge strength, cooling and combination sleepers who change position. If you sleep only on your side and want cushioning, lean foam-heavy; if you move around or share the bed, a spring-led hybrid is usually the safer choice.