Best Mattresses for Side Sleepers
Side sleeping asks more of a mattress than any other position. All your weight funnels through the shoulder and hip, so the surface has to cushion those points while holding your spine straight, a balance firmer beds get wrong in one direction and cheap soft beds get wrong in the other.
Getting it right comes down to a firmness that matches your build and a construction that contours rather than pushes back.
We don't sell mattresses ourselves, so what follows reflects what the position needs rather than what any brand wants to push.
Our picks for this sleeping position
Every mattress that suits this position
Emma Original Mattress
What side sleeping asks of a mattress
Lying on your side concentrates your weight onto two narrow points, the shoulder and the hip. A mattress that's too firm pushes back against them, creating pressure that shows up as numb arms and sore shoulders. Too soft, and the hips sink out of line with the spine. The job is contour with support: let the shoulder and hip settle in while the waist is held up, so the spine stays straight from neck to tailbone.
The firmness sweet spot
Most side sleepers do best between medium soft and medium, which is where the shoulder gets enough give without the hips losing support. Your build shifts the answer: lighter side sleepers should lean softer, since they barely compress a firmer bed, while heavier side sleepers can carry a medium firm comfortably because they press deeper into the same mattress.
Construction matters as much as firmness
- Memory foam is the classic side-sleeper material, contouring closely around the shoulder and hip.
- Hybrids pair that contour with springs, adding airflow and easier movement, a strong choice if you sleep warm or share a bed.
- Latex cushions responsively without the sunk-in feel, and sleeps cooler than memory foam.
- Zoned designs, softer at the shoulder and firmer at the hips, are built for exactly this position where offered.
Signs your current mattress is failing you
Waking with a dead arm, or with shoulder and hip soreness that eases once you're up, points to a surface that's too firm for side sleeping. A visible hammock through your hips points the other way, to support that's gone. Either way the fix starts with firmness, and for most side sleepers that means shopping medium soft or medium rather than anything firmer.
How we compare them
We use information from manufacturer and retailer specifications, verified owner reviews and our own catalogue data across more than 800 construction-checked models, with prices checked regularly across our UK retail partners. You can read more on how we assess mattresses and how we stay independent on How We Make Money.
What firmness is best for side sleepers?
Medium soft to medium suits most side sleepers, giving the shoulder and hip room to settle while supporting the waist. Lighter bodies should err softer, heavier bodies can go a step firmer, since weight changes how firm any mattress feels.
Is memory foam good for side sleepers?
It's one of the best-matched materials, because it contours closely around the pressure points side sleeping creates. If you sleep warm, a hybrid with a memory foam comfort layer gives similar relief with better airflow.
Why does my shoulder hurt when I sleep on my side?
A surface too firm for your weight is the usual mattress-related culprit, since it presses back against the shoulder instead of letting it sink. If pain persists across surfaces or into the day, it's worth speaking to your GP rather than assuming the mattress alone.
Can side sleepers use a firm mattress?
Heavier side sleepers sometimes can, because they compress it enough to reach some contour. For most, though, firm surfaces create exactly the shoulder and hip pressure side sleeping needs to avoid.
What pillow height do side sleepers need?
A relatively tall, firm pillow, enough to fill the gap between the shoulder and head so the neck stays level with the spine. A pillow that's too thin tips the head down and undoes the alignment a good mattress provides.