Best Mattresses for Side Sleepers

What Firmness Is Best for Side Sleepers

Most side sleepers in the UK benefit from a medium firm mattress, as it provides the ideal balance between pressure relief and spinal support.

When sleeping on your side, your shoulders and hips bear more weight. A mattress that is too firm can create uncomfortable pressure points, while one that is too soft may allow the spine to dip out of alignment.

As a general guide:

• Soft – Suitable for lighter individuals who need deeper contouring.
• Medium Firm (Recommended) – Best for most side sleepers for balanced comfort and support.
• Firm – Suitable for heavier side sleepers who require stronger support.
• Very Firm – Typically better for back or stomach sleepers.

Choosing the correct firmness depends on your body weight, comfort preference and whether you experience hip or shoulder discomfort.

Do Side Sleepers Need a Softer Mattress?

Not necessarily.

Many people assume side sleepers need a soft mattress, but in reality, medium firm is usually the safest and most supportive option.

A mattress that is too soft can:

• Cause the hips to sink too deeply
• Misalign the spine
• Increase lower back strain

A well-designed medium firm mattress provides enough cushioning for pressure relief whilst still supporting the natural curve of your spine.

Heavier side sleepers may benefit from a slightly firmer feel to prevent excessive sinking — read our guide for heavier sleepers.

How to Reduce Hip and Shoulder Pain When Side Sleeping

If you wake up with hip or shoulder pain, your mattress may not be providing adequate pressure relief.

To reduce discomfort:

• Choose a mattress with zoned support to distribute body weight evenly
• Ensure the comfort layers contour around the shoulders
• Avoid overly firm surfaces that create pressure points
• Use a supportive pillow that keeps your neck aligned

A mattress specifically designed for side sleepers can significantly reduce morning stiffness and improve overall sleep quality.

Mattress Buying Guide for Side Sleepers UK

When choosing the best mattress for side sleeping, consider the following factors:

1. Pressure Relief

Look for materials that cushion the hips and shoulders without collapsing under weight.

2. Spinal Alignment

The mattress should maintain a neutral spine position from head to hips.

3. Body Weight

Lighter sleepers often need more contouring, while heavier individuals may require stronger core support.

4. Temperature Regulation

If you sleep warm, consider mattresses with breathable comfort layers or cooling technology.

5. Durability

High-quality support systems ensure long-term performance and prevent sagging.

By selecting the right firmness and support level, side sleepers can experience improved comfort, reduced pain and deeper restorative sleep.